In short
Gut microbiome’s influence on brain health, immunity, and healthy aging; includes how specific gut bacteria may affect GLP-1 release, insulin sensitivity, neurodegeneration, and cancer immunotherapy response. Also discusses social connection as a major longevity factor and critiques long-term keto/ketosis as unsustainable.
Guests
Dr. William Li (physician/scientist; discusses medical training, microbiome research, and clinical studies). The host is not clearly identified in the transcript.
Key claims
- Akkermansia muciniphila (“acromantia”) helps the body release GLP-1 and improves insulin sensitivity; it’s linked to better cancer immunotherapy response.
- Keto/long-term ketosis is not recommended for healthspan; plant-based fiber/polyphenols better support gut microbiome.
- The brain has its own microbiome; gut-to-brain signaling may involve the vagus nerve.
- Lactobacillus plantarum (PS128) may slow early Parkinson’s progression; Lactobacillus reuteri may increase oxytocin and support brain/social function.
- Social connection is “overwhelmingly” important for longevity.
Notable examples
- Immunotherapy responders reportedly had Akkermansia present; non-responders were missing it (conference described: “Rethinking Cancer,” 2017).
- Akkermansia lives in the colon/cecum and feeds on mucus; foods/polyphenols that may increase mucus include pomegranate, cranberries (dried), concord grape, black vinegar, chili flakes, and peach juice.
Written by AI. May contain mistakes. Listen to the episode to check what was said.
Chapters
Tap a time to open that second in VOUnderstanding Akkermansia and Cancer Treatment
0:45 to 2:39
Discussion on Akkermansia's role in cancer treatment and immunotherapy responses.
“What do you think about people that have a very strong keto diet?”
The Importance of Social Connections
2:39 to 5:03
Exploration of how social connections impact longevity and health span.
“speaks to a dimension of humanity that we are able to confront now that we're going beyond the old argument of how many years you're going to be able to live.”
Aging Myths and Metabolism
5:03 to 7:30
Addressing misconceptions about aging and metabolism changes over time.
“that we all experience from the time we're born to our very last breath.”
The Vagus Nerve in Aging and Health
7:30 to 9:35
Insight into the role of the vagus nerve in health and aging.
“Their bones do get, their hormones change, their weight does change.”
The Brain Microbiome: New Discoveries
9:35 to 11:43
Discussion on the brain microbiome and its implications for health.
“But you can't recognize people, you can't communicate well.”
Healthy Bacteria in Unexpected Places
11:43 to 14:00
Exploring the presence of beneficial bacteria in various parts of the body, including the brain.
“again, when I was in medical school, I had to, in the first year, memorize bacteria.”
The Brain's Microbiome: A Surprising Discovery
14:00 to 14:47
Explore the existence and role of healthy bacteria in the brain.
“that you might not be able to cure, all right, with whatever antibiotics.”
Understanding Biohacking and Body Signals
14:48 to 15:51
Learn how to reconnect with your body and the significance of biohacking.
“And this is why we need to respect Mother Nature, why we need to listen to our bodies, because your doctor can't x-ray everything, blood test everything.”
The Disconnect Between Data and Feeling
17:40 to 18:35
Discuss the importance of listening to our bodies amidst a data-driven health culture.
“And this little gadget helps you on your journey.”
Gut Bacteria and Neurodegenerative Diseases
18:36 to 22:25
Explore how gut bacteria may influence neurodegenerative conditions like Parkinson's.
“I mean, I, you know, I'm the biggest conversation starter of that.”
Show all 29 chapters
Oxytocin Release: The Role of Lactobacillus Reuteri
22:26 to 25:05
Understand how Lactobacillus reuteri influences brain health and our social behaviors.
“More studies are going on on that, but it just shows us just the power of the bacteria and the brain.”
Understanding Probiotics and Their Importance
28:09 to 29:50
Learn about key probiotics and the challenges in identifying effective options.
“But I think that when it comes to probiotics, I try to look for, number one, whether it has the organism that I know something about that has research to support it, like Lactobacillus reidori or Lactobacillus plantarum.”
The Practicality of Probiotic Choices
29:51 to 31:44
Explore how to make informed choices when selecting probiotics.
“you know, we get on a podcast or we get on the podium or we get in front of the television and we talk about ideals.”
The Role of Acromantia in Metabolism and Immunity
31:45 to 35:39
Discover the significance of Acromantia mucinophila in health and disease.
“of information about them that makes me take it really seriously in my own life.”
Acromantia and Cancer Treatment Insights
35:40 to 39:28
Uncover groundbreaking findings on Acromantia's impact on cancer immunotherapy.
“So this is, like I said, a new frontier that's out there.”
Acromantia: Nutrition and Thriving
39:29 to 42:05
Learn about the dietary practices that can support the growth of Acromantia.
“our circulation is vital because we have the 60 ,000 miles of channels, highways and byways to bring oxygen and nutrients and blood cells to any medications you take to every single cell in the body.”
Understanding Acromantia: The New Gut Bacteria
42:05 to 43:14
Learn about the recently discovered bacteria Acromantia and its habitat in the colon.
“You know, just like any new animal you discover, you know, in the Amazon jungle, what does it eat?”
Role of Mucus and Nutrition for Acromantia
43:14 to 44:35
Discover how Acromantia thrives on mucus and the dietary fibers that promote its growth.
“So it's really quite amazing to think about it.”
Foods that Promote Acromantia Growth
44:35 to 46:44
Explore specific foods and their polyphenol content that help grow Acromantia in the gut.
“you can't eat acromantia from your food, but you can actually get it by, you can grow more of it, nurture it by putting more fertilizer, more food in for the acromantia.”
The Debate on Ketosis and Gut Health
46:44 to 49:03
Discuss the implications of a ketogenic diet on gut microbiome and overall health.
“So next time you're, I don't know if you like spicy food or not, but next time you have a little - I love spicy food.”
Finding Balance in Diet and Lifestyle
49:03 to 50:51
Learn how to integrate enjoyable foods into a healthy lifestyle without deprivation.
“Ketosis is sort of this reductionist way.”
The Holy Trinity of Beverages for Health
50:51 to 53:15
Understand the benefits of water, tea, and coffee as key components of a healthy diet.
“Yeah, well, I love that we're talking about that now because, you know, as this episode comes out, it's the end of 2025, beginning of 2026.”
Optimizing Beverage Choices for Gut Health
53:15 to 56:00
Tips on selecting and preparing beverages to maximize health benefits and gut microbiome support.
“in order to be able to hydrate yourself and get those polyphenols in.”
The Impact of Dairy on Gut Health
56:00 to 56:48
Learn how different types of milk affect polyphenol absorption and gut health.
“But cow milk actually has dairy fat, which forms little soap bubbles around the polyphenols.”
Hydration: A Key to Health
56:48 to 58:06
Discover the importance of hydration and strategies to ensure you're drinking enough water.
“Back to our conversation, the gut, the brain, the overall body, the metabolism, we don't want to be hurting that.”
How Cold Water Affects Your Body
58:06 to 1:00:01
Understand the benefits of drinking cold water and its role in metabolism and fat burning.
“It's so simple, but I think it's one of the most important overlapped messages of health.”
Finding Balance in Healthy Habits
1:00:01 to 1:02:39
Explore how to set realistic health goals and the importance of maintaining good habits on tough days.
“And when your brown fat is turned on, the mitochondria are in this brown fat actually start burning to generate literally heat to warm you up from the inside out because you drank something cold.”
The Role of Joy in Health
1:02:39 to 1:04:27
Learn why seeking joy and self-empowerment is crucial for a healthy lifespan.
“the, when we talk about health span, which is how long you can live in a good, healthy state, overall good health, the scorecard is not just your good days.”
Simplicity in Health Practices
1:04:27 to 1:06:05
Understand the importance of simplicity in health messaging and practices.
“And so I'm guessing, you know, the understanding that I've got from today is how important the mind, the body, but your emotional self-awareness is on your journey of your healthy lifespan.”
Transcript
Automatic transcript. May contain errors.0:00It's not a nice to have. It's a must have. It's not makes you a little bit healthier. It could be the difference between life and death. One thing that I've heard you speak about recently is the brain microbiome. We do know that certain bacteria can actually influence the brain. We'll talk about two of them. First, Dr. William Li returns to the conversation. What does acromancia do? What's the research there? It actually helps your body release its own GLP-1. The most jaw-dropping data on acromantia that I've seen has to do with response to cancer treatment. The people who responded to immunotherapy to cancer, life-saving, were the people who had acromantia.
0:36The people who didn't respond were missing acromantia. So when I saw that, I'm sure people sitting next to me heard my jaw drop and hit the floor. Well, it's interesting because you mentioned there a lot of foods that basically are fruit and vegetables. What do you think about people that have a very strong keto diet? Anybody who's really truly interested in living long and living well, that health span, ketosis is not the way to go. I know that some people might beg to differ, but I'm just telling you as a scientist, as a doctor, that's not what I recommend. And if you wanted to start thinking about one thing that can help to bulletproof you against many of the declines that we experience in aging biologically, medically, clinically, the time to start thinking about finessing your friend group and your social group and your family connections is probably like when you're hey guys i am very bad at asking for this but i wanted to stop for just one minute and ask a huge favor if you want to hear more diverse conversations from female voices such as myself i would love if you could hit subscribe we work so hard on this show to bring you some of the best guests in the world.
1:44And having a female voice sometimes gives a different perspective, and I really want to elevate more of that on this channel. So please hit subscribe if that's important to you, as it is to me. So if someone's listening to this, and they're going to the gym, they're driving to work, they've just had a long day, and they want to have one thing in their mind that they can still think about tonight to extend their lifespan, what would you say? I would say... the overwhelming evidence shows that to live a long and vibrant life, you have to have social connection. Surprisingly, this isn't about the food or the supplements or the injections, infusions, not even about exercise.
2:28And it's not necessarily about having a family necessarily either. It's really being surrounded by people and engaging with them. And I think that speaks to a dimension of humanity that we are able to confront now that we're going beyond the old argument of how many years you're going to be able to live. The other thing I want to bring up that I think will be interesting for your audience just to think about is that when you hear the word aging, you know, you're thinking 50, 60, 70 and older, right? But actually we're aging the moment we're born. I mean, there are these milestones where aging, in fact, is something very exciting.
3:14When did it stop being exciting? When did it stop being exciting for you? Do you know what? I'm a July baby, and in the UK, the year of school term runs from September to September, so I was always the youngest, the last one to be able to drive, the last one to be able to drink, all of those things. And I always wanted to be older, but now I love it that I for one basically 12 months younger than my peers who are in my year. I think mine started to turn, I think it might be different from a woman to a man, but I think for mine, mine was around 30. And I wake up on my 30th birthday in floods of tears, like floods of tears.
3:51And I haven't felt that since, but there's something about hitting 30 to me that felt that I had to have everything lined up perfectly. The relationship, like thinking about kids, like your career. And so that felt very pressurized. So for me, I think that's when it started to become more derogative than positive. So it's interesting, right? Because you point out as you entered your third decade, you began thinking about aging in a different way, not biologically, even though it may be connected to your biology, but it wasn't anything inside your body by itself. you don't start losing muscle mass until you're about 40.
4:30You don't actually start changing your metabolism till you're actually 60 if you're otherwise healthy. You sort of don't really, your brain actually doesn't really change until you're in your 40s or 50s as well. So there's, and I'm only bringing this up because we need to tease apart what society teaches us to think about aging versus what our biology tells us or tells us what to do or makes us feel. And this is where the mind and the body come together. And this is what I'm trying to say is that aging is the most natural process that we all experience from the time we're born to our very last breath.
5:10And so it raises this whole issue, this whole idea of social connection is really, really more important than we thought. And if you wanted to start thinking about one thing that can help to bulletproof you against many of the declines that we experience in aging biologically, medically, clinically, the time to start thinking about finessing your friend group and your social group and your family connections is probably like when you're 40. Wow. Okay. There's a lot that happens at 40, especially for women. I mean, that's kind of the start of the perimenopause and there's been so many conversations around this.
5:49You said something that made me stand up there, that metabolism doesn't change to your 60. I think a lot of people start thinking that, you know, when you're in your mid-30s, your metabolism changes. And that feels one of the biggest, that and wrinkles, I feel, on the artificial level. And then you've obviously got, you know, the bone density and fragility and all those things that are also kind of people think about as they get older. But if you're thinking about like the aesthetics, they're the two things I think that people think about the most. And that's just reframed how I thought about aging.
6:21Well, the other thing about how our metabolism changes is, and we made a talk about this on a past podcast episode, is these amazing realizations that the hardwiring in our body of how our body uses energy and generates energy, which on one hand is glucose metabolism, storage of our energy, then burning of our energy. That's what I meant by sort of your body doesn't actually change that many times in our lives. Like when you're born, your metabolism is set at zero. In the first year, it goes sky high, about 50 % higher when you're one year old than when you're in your 20s. And then it comes down between one year old and 20 year old.
7:10It actually declines to cruising altitudes. You overshoot in the beginning and then you hit your 20s. And it actually is designed to stay stable throughout your adult life from 20 to 60. And then only after 60, it declines a little bit, about 17 % until you're about 90. Four phases of human metabolism. Now, we, of course, know that everyone, when they hit their 40s and 50s, things do happen to their Bazi. Their bones do get, their hormones change, their weight does change. So what actually is happening? Well, I can tell you there, it's not the biology that's changing. It's that other forces surrounding us are putting pressure in our biology so that it's harder to hold up the lift of the metabolism that we're supposed to have, that we should be able to have.
7:59And this is an important point in terms of healthy aging and healthspan, which is that the things that, you know, you can't change your hormones that much, you know, as women who are going through menopause, but you can actually counter in other ways with stress mitigation, with exercise, with diet. All of those things matter and managing any chronic diseases. Now, an interesting, a super interesting area that I've been looking at recently is the impact of the vagus nerve. Love the vagus nerve. Okay. So I can, I'll give you like a very personal view of the vagus nerve. Okay. All right. Not my vagus nerve, but when I was a medical student, I was dissecting, you know, you're in the anatomy lab in your first year, okay?
8:46And you can track this gigantic nerve coming from underneath the skull, down through the neck, into the chest cavity. But now we know something really remarkable about this nerve that runs from the brain down to the gut. and that is that 80 to 90 percent of the signals actually don't go from the brain to the gut they run upwards it is really the telecommunication system from our whole body especially our gut up to the brain and so let's talk about aging and like the one of the most prized human qualities of being vibrant and thriving and and what most people i think would say is a non-negotiable when it comes to having good health span is having brain health, good cognition, right?
9:39Like, okay, where did I leave my keys? That's okay. But you can't recognize people, you can't communicate well. I think those are the things that people fear the most. Well, here is a new science that shows that whatever's happening in our gut, which is another area to talk about with healthy aging, is being communicated upstairs to our brain. And so this idea of gut microbiome, gut health is not just for people who are in the middle of their lives worrying about irritable bowel, but actually it's something that older people, as we go through our decades, really need to be thinking about having good brain health starts in the gut.
10:23Yeah, I think that is, I mean, it's integral. I think neurodegeneration is one of the most worrying things for most people listening, like thinking about their brain health, the lifespan of their brain. And I know we've spoken a lot about the importance of nutrients across the blood brain barrier of how we keep a thriving, healthy gut of all of these different components. One thing that I've heard you speak about recently is the brain microbiome, which I haven't really heard of before. I mean, it's interesting because we focus so much on the gut microbiome. We've got the skin microbiome. We've got so many different types of microbiome, the gut, the mouth, all of it.
11:03Talk to me about the brain microbiome. Okay. So, again, I'm going to come back to my medical school training. And I'm sharing this really for listeners and viewers because, you know, we count on doctors to be up on things. And I can tell you that we were taught certain things that we to believe as truth. And the nature of science is that things change as we learn more and what we're learning more about the human body. Just when we thought we knew pretty much everything there was to know about the body, we're discovering new nerve cells in the brain, new types of heart tissue, new kinds of stem cells.
11:37I mean, it's really mind-boggling what we're learning about the body. I will tell you the, again, when I was in medical school, I had to, in the first year, memorize bacteria. And along with the mantra that came along with memorizing bacteria was must kill bacteria. Then you had to memorize antibiotics, must use prescribed drugs to kill bacteria because bacteria are bad and they cause disease. Well, actually, as it turns out, most of the bacteria that we meet in our lives are not bad bacteria. Occasionally we meet some bad guys. Most of the time we are surrounded by and we are inhabited by beneficial bacteria that are good for us.
12:20We're surrounded by good guys and occasionally have a bad guy that needs to be put to rest. Now, we were also told in medical school that certain parts of the brain were sterile, guaranteed sterile. For example, mother's milk, completely sterile. There's no bacteria in mother's milk because, well, Mother Nature said you can't infect a baby, so it's sterile. Totally wrong. So the mother's milk, the first suckle, is filled with not only nutrients that we didn't appreciate before, but also bacteria that populate the baby's gut. So mom transfers healthy bacteria into the baby just with the first suckle, number one.
13:04Number two, we were told that urine was also sterile. And if you had bacteria in your urine, you had a bladder infection. That's still kind of the prevailing wisdom that's out there, but actually the bladder has its own microbiome, and it's healthy bacteria. So when you have a bladder infection, it's a dysbiosis. It's a disturbance of what's natural. Other sterile parts of the body, human semen was always thought to be sterile. It doesn't have bacteria. You can't have testicles loaded with bacteria. Wrong. We do actually have normal, healthy bacteria that live in the testicles as well. Interesting, right?
13:46So let's go to the brain. Of all the places that you do not want to have an infection, it's your brain, right? Meningitis is the lining of the brain getting infected. You have like a brain infection. When I was training to be a doctor, it was synonymous with a life-threatening infection that you might not be able to cure, all right, with whatever antibiotics. Well, it turns out now, because we're looking for healthy bacteria, the brain has its own healthy microbiome. It has its own bacteria, which to me is like a, it's a jaw-dropping thing to think about healthy bacteria living inside our brain.
14:27Number one, how does it get there? How do they get there? Number two, what are they doing in there, right? And we do know that bacteria and nerves communicate, like through the vagus nerve. And, geez, do we think that the bacteria in our gut hitched a ride up the vagus nerve and like taking an Uber and get dropped off in our brain? Maybe so. I love this analogy. Just imagine it. It's a remarkable area of research, and I think it causes those of us who – medical researchers like me get really excited by these discoveries because it means there's so much more for us to learn that can provide hope to people for good health span, for example, or overcoming disease.
15:11I also think that it forces us to assume a kind of humility in the medical community that even though we thought we knew a lot and where we have some tools that we can actually use, how little we actually know about how to heal. And this is why we need to respect Mother Nature, why we need to listen to our bodies, because your doctor can't x-ray everything, blood test everything. This is why biohacking is a useful tool to monitor. I mean, doctors biohack all the time. We take all kinds of tests, but we can't measure what we don't appreciate yet. And so I think this is why I always tell people, the first thing you need to do is to think about, reconnect with how your body feels.
15:59Listen to your body because it will be sending signals to you, communicating with you in ways that a doctor's test may not actually reveal. As someone who has spent a long time studying the mind-body connection, I'm constantly asked, what do I use to track my health? Since April, you've probably seen, if you're watching this show, me wearing a piece of tech on my arm, and that is NoWatch, because I genuinely believe it has been one of the most thoughtful and mind-aware pieces of tech that you can wear. Unlike most wearables that focus just on your steps or your sleep, NoWatch is a bit different.
16:32It gives you real-time insights into your nervous system, the invisible engine that calibrates everything from your stress to your sleep to your recovery, your rest, and ultimately, your health. With its stress recovery metric, it doesn't just show you how long you were stressed for, but also how long you recovered. It shows you your homeostatus. And that to me is where real health begins. And I think it's all something that we're craving. And most importantly, it does this without dragging you back to your phone, because that motion just depletes you. It delivers meaningful health insights to you only when something genuinely matters.
17:08Using AI to turn complex signals into clarity that you can understand. And in just five days, it calibrates to your body and creates your personalised health fingerprint. You can try it for 30 days completely free. And if you're curious, now's the time because they're giving you guys 15 % off with my code LWBW15 if you head to knowwatch.com. And you guys know as listeners of Live Well Be Well and this whole community that understanding yourself in the most mindful way is one of the most powerful things that you can do for your health. And this little gadget helps you on your journey. Do you think that's the most overlooked area right now of health, that we're just not connected to how we're feeling?
17:51Because we're so data-driven now, right? This is the big part of the biohacking world, that we're so driven by data that we sometimes forget to listen to our own data signals. Right. Well, it's interesting to think about. What is the data that we're actually processing in our brains when our gut doesn't feel well, right? Is it, are we feeling our gut? Are we feeling something in our brain? Or maybe both, right? And this is sort of this new world of self-awareness. And I think from a health and wellness perspective, we need to do a better job and we need to put more focus on helping people to listen to their own bodies and not just outsource it for the medical community or maybe even a smartwatch or, you know, a wearable to tell us what's wrong with us or what's right with us.
18:40We kind of know. Yeah. I mean, I, you know, I'm the biggest conversation starter of that. So we're talking about the brain and the gut together. And you sent me a, it must have been about a year ago now, a probiotic PS128 that potentially could support Parkinson's disease. not 100 % confirmed, but really interesting theory. People might not even know what that number is, might not understand what that means. Can you talk a little bit about how we might be able to target the gut microbiome for potentially treating neurodegeneration in the future? Right. Well, so here we are. We've been talking about the connection between the gut and the brain, the fact that the brain has its own healthy microbiome, well, that actually unlocks kind of a box that allows us to peer in to say, well, what else could we be doing to make healthier brains maybe with healthier bacteria?
19:42And the clues are starting to emerge. Again, you know, we're at the beginning of a new era of discovering how to achieve brain health. You know, we used to think, well, as you get older, the brain is going to decline. not necessarily, that if you damage the brain or their brain gets damaged, whether by trauma or by a stroke or even by cancer, it's not going to regenerate. Wrong. It will actually regenerate. And that, you know, pretty much if you lose certain functions, like whether it's smell or whether it's even vision, that once it's gone, it's gone. Not necessarily true. And so a lot of these previously long-held tenets about brain health are now, you know, just starting to be reconsidered when we looked at bacteria, healthy bacteria.
20:33So we do know that certain bacteria can actually influence the brain. We'll talk about two of them. First is Lactobacillus plantarum. So Lactobacillus is a whole class of bacteria that are really, really important for health. There's hundreds of them, different types of lactobacillus bacilli, and lactobacillus plantarum is one of them. Now, each type of genus and species, each type, each flavor of bacteria has lots of sub-flavors. You know, it's kind of like, I don't know, you look at, get coffee, you know, look at all the different types of coffee. You could have a pour-over, you could have an espresso, and bacteria the same way.
21:12So one of the interesting things is lactobacillus plantarum has been shown when delivered as a probiotic to smooth out and slow down the progression of Parkinson's disease. These are early clinical studies, but the fact that a single bacteria could actually have some measurable, discernible clinical effect when in people whose Parkinson's were not able to be well controlled. Now, this is early Parkinson's and they're looking at progression. So you can slow down that inevitable decline with bacteria. I had a really, really good friend of mine who passed away from ALS, which is Lou Gehrig's disease.
21:54That's a horrible neurodegenerative condition. We were lifelong friends, and I just watched him decline. In his last years, we were looking for, I was looking for bacteria that could actually help improve the brain. And that's how I first started to look at Lactobacillus plantarum. Now, he passed away from his condition, but the work has continued to go on in Lactobacillus plantarum. So it's called PS128. More studies are going on on that, but it just shows us just the power of the bacteria and the brain. the other thing that we know is that alzheimer's and other types of dementia seem to be linked to bacteria that are harmful in our mouth gum disease gingivitis inflammation of the gums due to bad bacteria growing in a dysbiosis in our gut like irritable bowel think about irritable mouth syndrome right so like uh except that we don't we don't see it we don't feel it the same way.
23:01You're not running to the bathroom all the time. You're just going about your way. But these unhealthy bacteria may be sending signals to upset the brain microbiome as well. So it kind of makes sense as we're discovering this and wondering, could it be that simple things that improve our mouth microbiome or a lower gut microbiome could actually reshape our trajectory of brain health. One of the bacteria that actually, lactobacillus, that actually helps the brain is lactobacillus reuteri. That's R-E-U-T-E-R-I, reuteri. This is an amazing bacteria. It used to be present frequently in the human gut, and over the last century, especially with the advent of antibiotics, it became less and less predictable, but we find it in foods.
23:56Lactobacillus ritori is very important. Let's first talk about the body. So it turns out that this is a bacteria that in pregnant moms hitches a ride on blood cells around eight months in pregnancy. And then circulates in your bloodstream. And like catching an Uber, it gets dropped off in the nipple so that when the baby takes the first suckle a month later, it squirts some lactobacillus down the baby's mouth into their gut. pretty amazing that a mom's colon bacteria could make its way into the mom's blood, get dropped off into her nipple, and then be delivered to the baby. So this is a kind of mapping, you know, kind of like the, how does this even occur?
24:39You know, and are there, and do bacteria like have their own ways where they can actually find their way to different organs? We don't know that, but we do know that lactobacillus reuteri actually does impact the brain and it impacts the brain by causing our brains to release oxytocin. Oxytocin being the social hormone is a hormone that floods us when we see somebody at the airport that we haven't seen in a long time that you like and you go up to arrival gate and give them a big hug you feel great that's oxytocin. When you get a kiss not just a peck in the cheek but a deep french kiss oxytocin have an orgasm that's massive amounts of oxytocin coming out and this is a bacteria that actually helps our brain dribble out oxytocin um and so again the brain is not just a collection of neurons that solve math problems but also helps us be that social organism that we talked about that's so important for healthy aging i'm interrupting for one moment to ask one small favor, please subscribe to the show.
25:46This helps it grow more than you know. And I'm so bad at asking this from you. I'm so bad at thinking about this, but you know, my goal is a hundred thousand to get to on YouTube. And I really want to bring you more content and better guests and bigger episodes. And we can only do that with your help together. So please do hit subscribe. Thank you. Okay. So I'm thinking people are probably now Googling these two probiotics that you were talking about, these two, well, they're not probiotics, they're gut bacteria. When someone looks, I know you mentioned food, but when someone looks at probiotics and they say, oh, it has 10 million in, 8 million in, all these different types of bacterias, how do we know if they've got these specific ones in?
26:31Because they don't obviously list all of the different types of bacteria. So again, it's so confusing for the average person. Yeah, you're asking the same question I've been asking for years, which is when it comes to dietary supplements and which probiotics fall into that category, how do you know what the right dose is? And how do you know what's in it? Because you hope that the manufacturers are reporting everything that's in it. And how do you know it's the right mix of bacteria or even if it's the right specific strain of bacteria? And if it's pure and manufactured properly, you know, every one of those questions, I think, still remains to be answered.
27:15But I believe, you know, if the same thing as food is medicine and medicine has a dose, so foods have a dose to optimize our health, so too do supplements actually have a dose that should be studied, right? So not just the maximum tolerated dose or the recommended dose. This is a whole area that I think, I don't want to use the word regulation, but I do think that we need to have better research connected to standards, connected to dosing, connected to recommendations so that different societies, whether it's a nutrition society or a medical society, can really begin to give better guidance on what we should be taking.
27:56In the meantime, what I would say is that I know I'm one of the people who really doesn't believe in extremes of reductionism. But I think that when it comes to probiotics, I try to look for, number one, whether it has the organism that I know something about that has research to support it, like Lactobacillus reidori or Lactobacillus plantarum. and you know this is all word salad to people who are exactly you know people have no idea and maybe we need to actually re even rename some of these bacteria like why do we have to give them the biop give people the biologist for you why don't we just call them sam and jerry and alice you know like there's a lot of opportunity here i think for people who are studying this to realize that these tongue twisters are really great for researchers like i'm a researcher so i can I can tackle that, but should we be helping people find an easier way to identify the bacteria that might be healthy for them, and therefore for the manufacturers of supplements to actually make it easier to be able to pick out the right ones, right?
29:01I don't know. I'm just raising that question. There's another bacteria that I'm really, I've done research with clinically that's also important. called Acromantia, Mucinophila. So these, you know, Lactobacillus plantarum, Lactobacillus ruteri, Acromantia mucinophila, I'm only listing three of trillions of bacteria that exist in a body. But those three, at least from my perspective, we know enough about. And for me, as a medical scientist, I know enough to take it seriously. So I think that, you know, I don't take a ton of supplements myself, but I'll take something that I know I will not otherwise get enough of through diet alone.
29:45You can't be eating fermented foods nonstop with every meal, right? It just doesn't happen. And I think this is the other kind of important thing about health and wellness is that, you know, we get on a podcast or we get on the podium or we get in front of the television and we talk about ideals. You should do this. It's plant-based eating. But the reality is we're We're all human, and we're going to go to birthdays and celebrations and weddings and wakes, and we're just going to be encountering food. We're just ordinary folk encountering our lives, right? And so I think that one of the things that we can do, anything that can make it easy, easier for us to make good decisions and be self-aware, not only of how we're feeling inside our own body, but how to make easy choices that can be helpful.
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30:31I think that that'll go a long ways in terms of providing the right answers, even for something like which probiotic should I take? Yeah. Well, I guess if people write down those three microbes that you just mentioned, would you be able to easily find that on a probiotic or would they list those ingredients or not? I mean, I would look for them, you know, I mean, listen, when I tell people like looking for a probiotic is recognize when there is a healthy bacteria Make sure it's in there, what you're buying. And I think it's a little bit buyer beware. You've got to do your research to pick it out.
31:10Listen, you're going to book yourself a hotel on a vacation to a place you haven't been. All right? Listen, you've got to do your research. Maybe if you do your research carefully, when you arrive at your destination, it should be exactly what you had hoped. It should be all you had hoped it would be. If you don't do your research and you just book wildly, who knows what you're going to get. You might be disappointed when you get there. So I think the same thing is when it comes to probiotics. So I'm not trying to plug any brand or manufacturer probiotic, but those three, I think, Lactobacilli, the Plantarum, the Ruderi, the Acromantia, those have a growing mountain of information about them that makes me take it really seriously in my own life.
31:56And I try to communicate this to people as well. What does Acromantia do? What's the research there? Is that for the brain mostly that you're talking about? Okay, so Acromantia mucinophila is a bacteria. So first of all, let's back up one second because we've tossed around a lot of Latin terms. Bacteria have a first name and a last name, a genus and a species. So Acromantia is the first name. Mucinophila is the last name, so to speak. All right. And then there's subspecies, relatives of all those. And it's actually only recently discovered. Only in the 1990s was this bacteria discovered. So it's not like Charles Darwin had it, you know, Acromantia in his logbook, you know, when he was around the Galapagos Island.
32:42This was really, really recent. The fact that we're still discovering new bacteria and identifying new bacteria, it's like going into the Amazon to see what kind of animals are out there. Well, we got our own Amazon we're walking around with, and it's the jungle of our gut bacteria, right? Amazing to me. I get really excited about this. So acromantia has been termed a keystone bacteria, meaning it's a really fundamental bacteria for health, and it does a lot of things. It helps to control our metabolism. So it makes our body's cells more sensitive to insulin, so we can absorb glucose more readily, which helps us lower our blood sugars in a better, more consistent fashion, so we have more energy.
33:31So that could be important for diabetics. It could be. Actually, it's very important for diabetics. In fact, there have been clinical studies done with acromantia showing that you can actually lower hemoglobin A1c by taking this one probiotic. So what I like actually are those - Why did doctors not say that? What I like is when these probiotic companies, which some of them regard, view themselves, portray themselves as biotech companies, they are investing in clinical trials to take a look at what these bacteria do. That's not food is medicine, it's probiotics is medicine. I'm a believer, and I like to see that data.
34:06So acromancy has been shown to to lower hemoglobin A1C, improve glucose regulation, insulin sensitivity, that's really great. It's not a great weight loss bacteria, but it can actually help your metabolism kind of like sharpen up a little bit. Newer research shows it actually helps your body release its own GLP-1. So, rather than paying hundreds of dollars for something you have to jab into your belly or your thigh, you know, take a bacteria that's gonna also help your body released GLP-1. Now, why is that, why could that be important? Okay, well, that might actually be helpful for weight loss or weight management, let's call it.
34:45It's probably a better goal to actually have. But GLP-1, and this is kind of emerging research, is not just for body mass, lowering body mass. GLP-1 is present, receptors present on every single blood vessel in your body, blood vessel cell. So 60 ,000 miles worth of blood vessels, 400 miles of which are in your brain, blood vessels, they all contain receptors for GLP-1. So now if you think about, again, this theme that we've been talking about, gut-brain, longevity, health span, brain health, think about that. So acromancy not only helps your whole body improve its glucose metabolism, but also can help to trigger blood vessels to be healthier, potentially, in all throughout your body, including your brain in terms of the circulation of your brain.
35:42So this is, like I said, a new frontier that's out there. The most jaw-dropping data on acromancy that I've seen doesn't have anything to do with metabolism, has to do with immune system, and it has to do with response to cancer treatment. And in 2017, myself and a group of colleagues across Europe convened a meeting in France called Rethinking Cancer. And this was intended to bring world-leading cancer researchers to the table to talk about their work with one ground rule. And that ground rule is you cannot talk about chemotherapy or drugs. Okay. So what's in a cancer research conference where you can't talk about cancer drugs or cancer therapies, right?
36:37Well, you got to talk about stress, sleep, diet, exercise, social wellness, all of the important things that cancer patients ask about, right? Well, the star presentation of that conference was a woman named Laurenta Vogel in Paris who was presenting work that she had done just then on 200 patients with different types of cancer, and they were receiving immunotherapy, which is not chemo. It actually activate your body's own natural immune cells to tackle cancer. And she was explaining her discovery that only about 20 % of people respond positively, meaning they benefit from having their own immune system woken up.
37:26Well, that really sucks if you're a cancer patient to know that immune treatment that could be lifesaving only works in 20%. So she set out to look at the differences between between responders where their immune system was woken up and supercharged and then goes after the cancer, whittles it down, in some cases to zero, stage four to stage zero. Okay, quite amazing. Versus people whose immune system are like duds. They don't do very much to the cancer. What's the difference? So she looked at gender. She looked at age. She looked at comorbidity. She looked at medications. Nothing. She looked at genetics.
38:04Nothing. The only thing that she found that was the difference between responders and non-responders was in the gut, the gut bacteria. And it was one bacteria, and it was acromantia. The people who responded to immunotherapy to cancer, life-saving, were the people who had acromantia. The people who didn't respond were missing acromantia. So when I saw that, I'm sure people sitting next to me heard my jaw drop and hit the floor, like that was just such a bombshell to recognize this is another important dimension of our gut health. It's not a nice to have, it's a must have. It's not makes you a little bit healthier.
38:47It could be the difference between life and death, you know, for a cancer patient. So for me, it sort of changed the way that I approach cancer as a disease, as a medical doctor advising patients and, you know, helping to guide patients. And so these are just examples of the profound discoveries that are being made with gut health, brain health, gut health, immune health. This is an area that if you want to have health span, like you got to survive cancer, you got to avoid dodge heart disease, you got to dodge dementia, you got to, you know, dodge all these other conditions. How do you do that?
39:26And I think it starts with the gut. Your circulation, our circulation is vital because we have the 60 ,000 miles of channels, highways and byways to bring oxygen and nutrients and blood cells to any medications you take to every single cell in the body. And they also may be kind of a transit. They might actually be public transportation in our body for our healthy bacteria as well. So can we get, what food is rich in, I can't even say it now, acromasia? I was literally completely fixated then on that. I literally had a text from one of my oldest friends last night to say that her dad is now going through six weeks of cancer treatment because they found cancer in his glands and his throat, but because it's too close to all the other glands, they can't operate.
40:19So he's going through really intense treatment. i'm now naturally thinking i need to tell her about well this microbe you know so again i can't give medical advice uh sort of on a podcast but you know and um but i would tell you that for um all cancers immunotherapy is something that every cancer patient should ask for should have a conversation with their oncologists about. And the reason is this is the first time in history, modern history, where a cancer treatment has the potential of completely reversing your disease. And if you can reverse your disease, the impossible becomes possible. And I've seen it now time and time and time and again in people receiving immunotherapy.
41:10Of course, if you're going to get immunotherapy, you want it to work. And now we're beginning to realize that what is in your gut, like acromantia, can make that difference. So for example, should someone we know be recommended to immunotherapy, they should also think very carefully about their gut health because we know organisms, healthy bacteria like acromantia, can play a critical role. So what foods should, I mean, I know it's very hard maybe for going through treatment, but thinking about this even for prevention, right? What are the foods that are rich in this microbe as well as a probiotic?
41:46So acromantia is not really present in food. So that's one of the reasons why taking it as a probiotic can be very helpful. Beneficial, okay. Beneficial. But foods that you eat can actually grow acromantia. So again, let's use the Amazon example again of digging in there, right? So here we have discovered this new bacteria. It's only about 30 years old or so. that we've even recognized it. And we have to observe what it does. You know, just like any new animal you discover, you know, in the Amazon jungle, what does it eat? Where does it live? What makes it thrive? And all that kind of stuff. Well, it turns out acromantia lives in the colon, the lower part of the large intestines.
42:30It tends to live in an area called the cecum. It's kind of like just the first part of your large intestines coming out of the small intestines. It's this kind of sack. Most of the bacteria, healthy gut bacteria live there. Incidentally, that same area, the cecum, is where the appendix lives. We used to think about the appendix as a vestigial organ. Get rid of it. No, it doesn't do any good. I don't know. Sometime when we were crawling out of the swamp as humans, you know, like we developed an appendix and we didn't need it anymore. We're rethinking that. we now are starting to believe that the appendix in the intestines and the cecum, which is located right where the gut bacteria are, which are so important for our health, might actually be a storage area for replenishing healthy gut bacteria, right?
43:22So it's really quite amazing to think about it. And also maybe immune reservoir as well. Okay. So Aggraminza lives there and what does it eat okay it eats mucus that's normally found in our gut people might say that sounds really disgusting but actually our gut is filled with mucus naturally we know this like if you ever had diarrhea you know like a lot of mucus comes out but even for normal stool your regular healthy mucus is part of our gut okay just like and it starts in our mouth we have mucus all throughout we've got mucus. Acromantia is called acromantia mucinophila. It likes mucin. It eats mucus.
44:05It actually eats it all up. So the more mucus you have, the more acromantia you can grow because you've got more food for it to eat. So how do you grow, get mucin? Fiber? Fiber is helpful. And acromantia will eat fiber. But it turns out that elagitanins, which are polyphenols found in certain foods can help your gut secrete mucin, which then is the natural food for the acromantia. So you can actually grow more acromantia with food. You can't eat it, you can't eat acromantia from your food, but you can actually get it by, you can grow more of it, nurture it by putting more fertilizer, more food in for the acromantia.
44:43So the foods that actually grow acromantia, pomegranate and pomegranate juice, cranberries, I'd say dried cranberries because not cranberry juice, because cranberry juice is so sour that you would almost have to put a ton of sugar to make it palatable. Don't do that. Just have dried cranberries. It's a wonderful little snack to give you those polyphenols. Concord grape juice. If you ever had grape candies when you were a kid, that flavor of grape candy is exactly how real Concord grapes taste. That's the model and what they were. But other things as well. It turns out Chinese black vinegar. If you've ever had soup dumplings, they have a little canister of black vinegar next to it.
45:28You put it in your spoon to have the soup dumplings with. That grows acromantia. Hot chili peppers, like dried chili flakes, actually will also grow acromantia as well. Peach juice has been shown to grow acromantia. So again, this is another one of those areas of research where we're beginning to discover more and more foods that can actually help your body grow. The acromantia, most of them actually work by helping your gut secrete more mucus that the acromantia thrives on. So it's got food to eat. So more of it will actually grow there. So question, a lot of those were juices. So if you had peaches, would it do the same thing?
46:03If you had grapes, would it do the same thing? If you had cherries, would it do the same thing? Yeah, I mean, that's exactly what it is. These are ways to, you know, my book Eat to Beat Disease, the whole point is, you know, like we can eat things that we like. I love grapes. I love pomegranate. Integrate those into your lives because you like them, but also because you recognize that researchers like me and others have figured out they actually do something good for your body. They help your body perform better. So if you're into optimizing your health, you know, live better, be weller, then these are the foods that you can actually add to your life to really enhance what you do.
46:45So next time you're, I don't know if you like spicy food or not, but next time you have a little - I love spicy food. Yeah, I love it too. You know, next time you see a little canister of dried chili flakes, think about it. That will actually help your body grow acromasia, which helps your body metabolism by using insulin more effectively and actually activates your immune system and potentially helps your immune system fight cancer if you are on cancer treatment. So these are the kinds of things that are, there's a lot of complicated science, but I would sort of encourage people to think about this conversation if you're listening or watching this.
47:22These are moments of joy to recognize the foods that we already love can actually be good for us. So we don't have to, you know, I think I like to think about health as something that we lean into. It's full of abundance, not deprivation, which is exactly flipping the script on what we used to think about healthy food, which is you got to cut everything out. Now, I think it's about identifying and recognizing the healthy things you can add in. Absolutely. Well, it's interesting because you mentioned a lot of foods that basically are fruit and vegetables. What do you think about people that have a very strong keto diet that don't include these foods?
48:02Because this feels very connected to the gut microbiome. Yeah. Well, look, I mean, I first learned about ketosis when I was in medical school. I'm bringing it back to my origin story as a doctor. And ketosis is not a good state to be in. Ketosis is like what happens to be out-of-control diabetes. And it's not sustainable. Like you should not be long-term in ketosis. Your body develops ketones really as a rescue mechanism because you're not actually having enough carbs or sugars. So it's got to do something in order to survive. You can't do that very long and expect to be very healthy. So I say anybody who's really truly interested in living long and living well, that health span, ketosis is not the way to go.
48:52I know that some people might beg to differ, but I'm just telling you, as a scientist and as a doctor, that's not what I'd recommend because it's not a sustainable state of health. And it'll actually pull the rug out from other systems in your body that also need to be healthy and work well together. Now, the thing is that I think it's important to recognize that those polyphenols that come in and the dietary fiber that come in the foods that are healthy for us, you know, and it's called plant-based foods, they actually help us sustain our systems overall. Ketosis is sort of this reductionist way.
49:34Let's look at ketones. Let's focus on one thing. And it worked. I mean, listen, it turns out that ketosis actually can be a powerful, has been shown to be a powerful way clinically to intercept epilepsy in children. It's also been surprisingly useful to intercept certain brain cancers to change the speed of growth of brain cancers. So, you know, there clearly has profound effects. The question is, and I think this is the one that really needs to be asked, anytime anybody thinks about any kind of diet that's kind of extreme, is it going to be good for you in a long run? It might be actually very useful for you in the short run.
50:13It's kind of like when you're trying to train for a marathon. You want to be disciplined or an actor, you know, training for a film role or a model, you know, needing to be prepared in a certain way. These are not necessarily healthy habits, or I would say in general, not healthy habits that you don't, you cannot sustain them for a long period of time. Here we are talking about living well and healthspan. You want to actually find that sweet spot where you get to do the things that you enjoy, where the things that you enjoy also do something good for your body and your brain and allow you to take your entire journey in kind of like a satisfying way.
50:51Yeah, well, I love that we're talking about that now because, you know, as this episode comes out, it's the end of 2025, beginning of 2026. this is naturally the time when people cut things out and I always find it quite an interesting period because it's like new year new you and there's so much pressure to live in this you know quotations optimized way and people kind of cut the joy out which also makes me believe that's why people don't sustain long-term goals and so for people like starting this journey going into 2025, 2026, what advice would you give with all the noise that's going to be around them and all their goals that they're going to want to achieve, like how to stay aligned to healthy aging and actually keep the habit going?
51:40So much to unpack there. I'm going to try to boil it down very simply because this is something that everyone can do no matter where you stand. I say start with beverages. I'm not talking about beer or alcohol. I'm talking about what I call the Holy Trinity of beverages that we should all do more of. And the Holy Trinity of beverages is water, which hydration is the key to life itself. You know, we don't have water, we quickly desiccate, we dry up, and we will not live a long time. Water, and then tea, which has water in it, but then the polyphenols from tea and some of the dietary fibers from tea.
52:23If you have matcha, for example, you're having dietary fiber from the tea plant, that's good for the gut microbiome as well. And then coffee. It turns out coffee actually is very, very robust with polyphenols and also good for many different parts of your body. I want to move the conversation about caffeine aside for one second. I'm happy to talk about that. But the polyphenols from tea, the polyphenols from coffee, and just the inherent goodness of water. If somebody wants to actually clean up their act and kind of like get into a new state of being, there's a million ways you can do this, you know?
52:58And this is why people hire life coaches and nutritionists and, you know, get into programs. And those are all things that you can do. And everyone's got a different starting point. But I'd like to boil it down simple. I say, start with your beverages, make sure you drink plenty of water and then drink tea and coffee and alternate with tea and coffee in order to be able to hydrate yourself and get those polyphenols in. Turns out that, and you can fine-tune those as well. With water, try to drink purified water, meaning some kind of filtered water, because we're now beginning to realize that the contaminants in water, which include microplastics and heavy metals, those things will eventually compromise your health span.
53:39So we want to get the cleanest water you can. simple way to do that just avoid drinking water out of a plastic bottle so and we've all done it right I mean for for years we were all being handed a plastic bottle of water on vacation now no don't do that anymore don't drink out of a plastic cup and then I think tea try not to use tea bags use loose leaf tea like they do in Asia and the little trick to get kind of the pro tip to actually get loose-use loose-leaf tea is you have really hot boiling water. Just get a pinch of tea leaves and put them in a cup. Pour in the hot water, like boiling water, just after boiling.
54:24Take it off the heat and then use it. And what happens is the tea will properly be steeped and ready to drink when the leaves have soaked up in a fluid and they actually drift their way down to the bottom of the cup. When the leaves are at the bottom of the cup you're ready to sip the tea and you can actually put more add more water to re-steep the tea like that two or three times and get more polyphenols out of it coffee you know there's it turns out that the polyphenols in coffee are in the you know you can anytime you're brewing coffee through grounds you are extracting those polyphenols the chlorogenic acid many other things good for you.
55:04And what you want to do is find what is the best kind of like roast of coffee. Turns out that it's medium roast that gives you the highest polyphenols that are beneficial to you, right? And organic coffee actually has a higher level of the polyphenols compared to conventional coffee. So again, three simple beverages that most of us probably like, Have to have water, tea, coffee. There's not a lot of controversy around those. There's no schools of thought about them. If you are sensitive to caffeine, decaf is okay. Just recognize that by removing the caffeine, you're also removing some of the polyphenols.
55:47You're not going to get them all, but you'll get still some. And even decaffeinated coffee or tea still has a little bit of caffeine left in it because it's impossible to remove the whole thing. The other little tidbit I would say about the beverages, if you wanted to start a new chapter, fresh, clean with these beverages, is don't add dairy milk to it. Plant milk is fine. Almond milk is fine if you like. But cow milk actually has dairy fat, which forms little soap bubbles around the polyphenols. So when you drink it, you're actually flushing through your gut. most many of the polyphenols about 80 you're only absorbing about 20 but plant-based milk won't form those little soap bubbles and don't add sugar to it i like my coffee straight i never put tea in my sugar in my tea and absolutely avoid artificial sweeteners which although we're still figuring it out does look like many of the common artificial sweeteners actually can damage your gut microbiome Back to our conversation, the gut, the brain, the overall body, the metabolism, we don't want to be hurting that.
57:00So if you want to actually start your new year with a new you, I think beverage is a simple weight actually that anybody can actually do. Yeah, I love that. And also, I see one of the biggest mistakes. Because hydration feels so simple, we overlook it more than we should. and then when we're dehydrated our thirst mechanisms switch on so two percent dehydration we're already sending signals to say I'm thirsty but the problem that I see is that a lot of people get that mixed up with hunger signals and so people end up turning to food instead of water to actually hydrate which also means that that's just a healthy habit but like my the thing that helped me the most and then has helped the clients that I work with is just always keeping water in eyeline.
57:47Because the amount of times that people might become hyper-focused on a task or they're busy running around, it's just not in their train of thought. And so I always say to people, put it in front of your eyeline because you're basically creating a stimulus of a signal to tell your brain, oh, I should maybe drink water, rather than having to seek water out when it comes to your mind. So that's such a... It's so simple, but I think it's one of the most important overlapped messages of health. It's a brilliant and simple tip that, you know, that we encounter all the time. And I will also tell you what's interesting about water.
58:24If you drink a little water at the beginning of your meal, you'll actually start to stretch your stomach a little bit because water takes space, right? Like if you've ever gone to a pet store to buy some fish, what do they do? They take a plastic bag and then they put some water in it. And then before they catch the fish, put your tank at home. Right. So think about it. You put a little bit of water in your stomach by drinking water. Just take a few, take a few gulps in the beginning. You're starting to stretch your stomach like that plastic bag in the pet store. And that stretch of the stomach actually starts sending signals to your brain to say, oh, we're getting filled up.
59:02So you're also less likely to eat as much. You'll start to feel full a little bit sooner. So that can be a little tip to help you eat a little bit less, which can be also healthy. The other interesting thing about water, if you have cold water. Now, I know different cultures have different feelings about warm water, hot water versus cold water. Like in Asia, they never want you to drink cold water. But I will tell you that there is some wisdom in drinking cold water. Like I always put ice in my water. I like ice. I would never think you'd do that. Let me tell you why. this isn't why i like cold water but though when you actually put cold when you drink cold water into your stomach guess what your stomach is is has got receptors uh that actually sense temperature and so it senses that it's got really cold temperature in your core right that's core your core temperature is down with some water and so what it does is that she turns on your brown fat to generate heat.
1:00:02And when your brown fat is turned on, the mitochondria are in this brown fat actually start burning to generate literally heat to warm you up from the inside out because you drank something cold. That actually, the brown fat, in order to get that energy for the mitochondria to burn hot to create heat, thermogenesis, it actually draws fuel from harmful white fat. So your good fat burns down bad fat when you drink cold water. And this has actually been studied clinically with people drinking cold water. Wow. Is that similar as why it works with ice baths? Well, that's another reason. That's another way to get it, except that now you're being surrounded.
1:00:42Now your whole body's being dipped like a popsicle into cold water. Yes, thermogenesis is actually, it's sort of a reboot to your metabolism, a wake-up call, right? And then, And oh, the other thing about cold water, this is not about drinking it, but this may not be well known to most people. If you splash cold water in your face, so you're getting up and you're like, oh, I feel so sleepy, I'm going to splash some cold water. You know, that actually, that cold water can be sensed by your face and it actually will stimulate your sympathetic nervous system. It'll turn down your vagus nerve and it'll snap you awake as well.
1:01:23So again, I'm just talking about cold water not being a harmful thing that they talk about in Asian cultures. Like you should never drink cold water. You have room temperature or slightly warm water. I'm just telling you, there is a biological reason why drinking cold water can be helpful. I love that. Well, I think these are really easy habits to put into the start of a new year, maybe post-Christmas. or even I always try and say like adding these in throughout even the hardest periods because I think the reason that I feel people I hate using the word fail but become deterred from eating well is because they always try and set themselves up for the best days like these are the most optimal even though we don't even know what the word optimal means but these are the most successful days and so if I can integrate it in these days then I'm going to be successful in keeping it going.
1:02:16But actually, we don't have great days every day. We also have really hard days. So you've got to make sure that when you start putting these habits in, you set them up for your hardest possible days, because that allows you to try and keep the retention of the habits that you're putting in, rather than, oh, I feel great today, so now I'm going to start, because actually that's the easiest. You know, I think what you're saying is so true. the, when we talk about health span, which is how long you can live in a good, healthy state, overall good health, the scorecard is not just your good days. The scorecard is really looking at all of your days and averaging them all out and seeing how you come out at the end.
1:03:02And I think this is why extreme, pursuing anything in extreme actually can work pretty effectively in the short term if you are having a very, very specific goal. So let's be really clear. I'm totally championing people who know their goals in the short term and really are dedicated to kind of achieving them in safe ways. But I think that overall, when you're talking about living a long, healthy life, you got to look at that scorecard as really the signal average of how you're doing overall. You're going to have some good days. You're going to have some bad days. And if you try to really, and this goes back to what my point about joy is, if you try to find joy in your own life, if you aim towards joy, like joy shouldn't be a gift that somebody else gives you.
1:03:53Sure, every now and then you might be surprised by somebody else doing something nice for you. But joy is something that we're all responsible for in our own lives. And I think this kind of self-empowerment is something that we almost are taught to remove from our psyche from the time we're young in school. You know, like, you must work hard. You must—no pain, no gain. I actually think that in order to get to good healthspan, we need to rekindle our own self-awareness of joy and give ourselves permission to seek it. Yeah, absolutely. And so I'm guessing, you know, the understanding that I've got from today is how important the mind, the body, but your emotional self-awareness is on your journey of your healthy lifespan.
1:04:42How important it is to have friends and social connection and feel supported by yourself and by others. The importance of polyphenols for acrymansia, which seems to be a bit like the supercharger when it comes to our health. and actually taking time to understand what brings us joy along that journey and also making sure that you're kicking up with your hydration and having lots of green tea and cold water, apparently. You know, I think those are all... You summarized that beautifully. But what's nice about it is that they're all practical. I know. Well, this is the thing. I think sometimes...
1:05:23And we spoke about this just before you came on, you know, So much now is over complication of health. And the sadness is that it's also marketable. And everyone wants to have good health. I mean, everyone has the same end goal, to feel well, to look well, to be well. But getting there now feels a little bit more foggy because we're just blocked by so much information. And it's not someone's job to understand what's right or wrong. We're hoping that people are telling us the right things. But actually, it's just so muffled now that we're trying to fight against it. And so it creates a longer distance and also a big friction point to getting there.
1:06:05Yeah, my philosophy is always, you know, keep it simple, make it joyful, and make it possible for you to do in the long run. Absolutely possible is so important. And joyful. It's a joyful season. We are recording this in December. so um will thank you so much for coming on thank you for having me on again it's always a pleasure so i have to leave with the last question i don't know if you remember i can't remember what you said on the last three times i might do a compilation of you four times saying the answer the question the answer to this question i'm about to ask you and see if it's changed okay we'll see if it stayed the same so my fourth time i'm asking you this which is will what does live well be well mean to you?
1:06:51I would tell you it's taking it easy on yourself because I think especially people who are high achievers who really are goal oriented we tend to be really hard on ourselves and one thing that I think is important to do is to be able to give yourself a break. Allow yourself to be able to find that joy. Make it easy for you to do that. And that's hard for a lot of people who are strivers. Yeah, I call them optimizers. And it's hard. It's hard to take a step back, but important. So thank you. I don't think you said that before, but I feel like this has been a bit of your own journey. Maybe. I think we're always connected to things that, you know, when it changes, it's like science.
1:07:41Exactly. Amazing. Thank you so much. Thank you. Thank you.
From the publisher
In this episode of Live Well Be Well, I’m joined by Dr. William Li, physician scientist, bestselling author, and president of the Angiogenesis Foundation. William is one of the world’s leading voices on food as medicine, and together we explore how nutrition, immunity, and brain health are deeply connected, often in ways we underestimate.
In this conversation, Dr. William Li shares how the body’s defence systems are constantly communicating with the brain, influencing inflammation, cognition, mood, and ageing. Drawing on decades of research, he explains how everyday foods can strengthen immunity, protect blood vessels, and support brain function, not through restriction or perfection, but through consistent, nourishing choices.
We discuss why immune health matters far beyond avoiding illness, how inflammation silently impacts mood and cognition, and why nourishing the body is one of the most accessible tools we have for long term resilience. This episode is an invitation to move away from fear based nutrition and toward a calmer, evidence led understanding of how the body heals, adapts, and thrives when supported consistently over time.
Here’s What We Dive Into:
- How the immune system influences brain health, mood, and cognitive ageing.
- Why chronic inflammation quietly undermines wellbeing long before symptoms appear.
- What angiogenesis is and why healthy blood vessels matter for brain function.
- How specific foods support the body’s natural defence and repair systems.
- Why food as medicine is about consistency, not restriction or perfection.
- What the science really says about nutrition and disease prevention.
- How everyday dietary choices shape long term resilience and longevity.
- Why empowering people with knowledge creates healthier relationships with food.
Love,
Sarah Ann 💛
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This episode is sponsored by:
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Connecting body and mind with unique stress recovery insights so you can live fully today
15% off with code LWBW15 at nowatch.com
***
👉 Practical beats perfect.Here’s a free 5-recipe PDF I use to support energy and stress during busy weeks.https://sarahannmacklin.com/5_free_recipes👉 If this resonates, you can join the thousands who readThe Compassionate Cure each week.https://sarahmacklin.substack.com/
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Intro (00:00)
Why Social Connection Is Essential for Longevity and Brain Health (02:11)
Reframing Ageing and Letting Go of the Decline Narrative (04:26)
How Metabolism Shapes Ageing, Energy, and Disease Risk (11:03)
Why Biohacking Misses the Bigger Picture of Longevity and Health (15:26)
The Brain Microbiome and How Gut Bacteria Affect the Mind (19:12)
Probiotics and Brain Health What the Science Shows (23:29)
How to Choose the Right Probiotic Based on Evidence (30:40)
Akkermansia and Its Role in Metabolism and Diabetes (35:46)
Gut Health, Immunity, and Cancer Treatment Support (40:02)
How to Increase Akkermansia Naturally Through Diet (41:37)
Do Restrictive Diets Support or Harm Gut Microbiome Health? (47:56)
Hydration, Polyphenols, and Healthier Beverage Choices (50:54)
The Simple Hydration Habit That Prevents Mindless Eating (57:12)
Balancing Longevity Goals With Joy and Simplicity (1:01:42)
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