Dr. Tim Spector: The Truth About Diet, Gut Health, and Why Calories Fail | Health & Wellness | E410

3 Aug 2026 · 1 h 14 min · 29 chapters

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In short

Argues calorie counting fails for long-term weight control; emphasizes gut microbiome-driven individuality in food responses; promotes shifting focus to food quality/structure and avoiding ultra-processed foods. Covers organic labeling skepticism, protein vs fiber misconceptions, and grocery-label “red flags,” plus practical microbiome-support tips and a Zoe app “ultra process risk score.”

Guest

Dr. Tim Spector, founder of the UK’s largest twin study; co-founder of Zoe (personalized nutrition). Background includes training as a rheumatologist, then epidemiology/genetics; has published nearly 1,000 papers and studies large cohorts (up to ~300,000 via Zoe).

Key claims

Identical twins can have markedly different gut microbes, showing environment/food quality matters beyond genetics. Microbes act like “mini pharmacies,” producing chemicals affecting metabolism, nervous system/mood, and immune function. Ultra-processed foods are absorbed early, starve microbes of fiber/polyphenols, and include additives/emulsifiers that can disrupt microbes; they also drive overeating via “hyperpalatability” and softer textures.

Notable examples

Fruit fiber/polyphenols reaching the lower gut vs UPF being absorbed in the upper intestine; “Daily 30” prebiotic mix (34 plants) outperforming standard probiotics; red flags include many unfamiliar ingredients, emulsifiers, low-fiber, “low fat,” and “low calorie” products.

Written by AI. May contain mistakes. Listen to the episode to check what was said.

Chapters

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The Reality of Protein and Fiber Needs

0:34 to 1:29

Discover the surprising statistics on protein and fiber needs in our diets.

“Only 10 percent of people need more protein, whereas 95 percent of people need more fiber.”

Understanding Organic Labeling

1:29 to 2:06

Gain insights into the implications of organic food labeling and its effectiveness.

“I can't wait to learn all about gut health and the types of foods we should be eating.”

The Impact of Gut Microbiome Research

2:06 to 3:15

Explore how twin studies reveal the individuality of our gut microbiomes.

“It's taken me 30 years to get to this point.”

Exploring the Microbiome's Role

3:15 to 5:10

Learn about the microbiome's functions and its relationship with our health.

“So that really fascinated me is this extra bit of individuality we've all got that you can see clearly in these identical twins that's quite difficult to see in the general population.”

Food Choices: Whole vs. Ultra-Processed

5:10 to 8:59

Understand how different food types affect microbiome utilization and health.

“You know, you name it, the immune system now is involved.”

Promoting a Healthy Microbiome

8:59 to 13:20

Discover effective strategies for maintaining a diverse and healthy microbiome.

“It sounds like we really should not be eating a lot of ultra-processed foods.”

The Fallacy of Caloric Counting

13:20 to 13:33

Uncover why experts no longer support calorie counting for health.

“And we should be thinking about the quality of the food we're eating and ignore calories because calorie counting just doesn't work.”

Meal Prepping and Plant Diversity

13:33 to 14:00

Learn how to effectively meal prep while ensuring plant diversity in diets.

“Yeah, this gives us so much to kind of dig on.”

The Importance of Dietary Variety

14:00 to 15:00

Learn why varying your food choices is crucial for gut health.

“You can get like Persian carrots, which are purple, different to orange ones.”

Understanding Processed Foods

15:00 to 17:00

Discover the difference between processed and ultra-processed foods.

“So if they were meal prepping, you just add these 30-odd extra dried plants, and that gives you the diversity.”
Show all 29 chapters

The Misconceptions Surrounding Canned Foods

17:00 to 20:00

Canned foods can be nutritious; learn why they are often misunderstood.

“Like yogurt is technically processed, right?”

Reevaluating Ultra-Processed Food Definitions

20:00 to 23:00

Understand how ultra-processed foods are classified and the implications.

“People focused on these red dyes or something else, but that's just one part of the story.”

Introducing the Zoe App

23:00 to 23:40

Learn about the Zoe app and its role in identifying food risks.

“So it's understanding the basic science of what they're trying to do allows us to then combat it and realize, okay, this is the antidote.”

Identifying Red Flags in Food Labels

23:40 to 26:30

Get tips on what to look for on food labels to avoid ultra-processed items.

“So what is some quick ways, like for reading the back of a package and looking at the ingredients, Like, what are some red flags to show, okay, this is ultra processed?”

The Downside of Calorie Tracking

26:30 to 28:00

Learn why tracking calories may not be the best approach to dieting.

“So when I'm online and I'm following all these fitness influencers and nutritionists that are influencers, a lot of them are telling you to track your calories, track your macros, and they're really obsessed with that.”

The Misconception of Caloric Intake

28:00 to 30:58

Learn why calorie counting can be misleading and how whole foods impact hunger.

Understanding the Food Matrix

30:58 to 33:50

Discover how food structure affects calorie absorption and health outcomes.

“It's, you know, how do I shift everything about my body and my gut microbes in that right direction that's going to last me for decades and help my immune system and everything else?”

Personal Health Transformation

33:50 to 36:58

Hear Dr. Spector's personal journey and health awakening after a mini stroke.

“And if it can get you that food down, say, you know, you finished your meal in 15 minutes or 10 minutes or whatever, then your hunger centers won't have kicked in in your brain as well.”

Navigating Career Changes in Medicine

36:58 to 39:58

Understand the challenges and insights gained from shifting medical specialties.

“but also to rewrite a lot of these nutritional guides because a lot of the nutritional guidelines haven't caught up with the latest science and they're always lagging at least 10 years behind.”

The Moral Implications of Food Choices

39:58 to 42:00

Explore the ethical issues around food production and marketing strategies.

“Generally, you know, US students, usually male, usually, you know, under 25.”

The Power of Food Choices

42:00 to 43:10

Learn how making better food choices can lead to a healthier life.

“it was all about vitamin deficiency, not about, you know, dealing with modern food and the food industry.”

Debunking Grocery Store Labels

43:10 to 46:46

Understand the meanings behind common grocery labels and their implications.

“So I thought we could play a little bit of a game where we talk about the grocery store label lies.”

The Misleading 'Natural' Label

46:46 to 49:16

Discover why terms like 'natural' and 'made with real fruit' can be deceptive.

“Now, everything says the amount of protein on the front, high protein, high protein.”

Navigating Common Grocery Items

49:16 to 53:16

Learn tips for choosing better quality bread and yogurt while shopping.

“So they realize the consumer doesn't want artificial dyes, but they would be happy if there's something called a natural dye made from carrots or beetroot.”

Concerns Around Food Packaging

53:16 to 56:05

Explore the impacts of food packaging on health and practical ways to reduce plastic use.

“But I think work out what you're having regularly and then always get the better version of it, I think is what we should be aiming at.”

The Importance of Fermented Foods

56:05 to 1:03:48

Learn why fermented foods are beneficial for gut health and the immune system.

“So I want to close out today's interviews talking about fermented foods.”

Improving Mental Clarity Through Diet

1:03:49 to 1:06:45

Discover how dietary changes can enhance mood and cognitive function.

“All the experiments we've done at Zoe have shown that the first effects of improving your diet from a gut point of view are in the brain.”

Personalized Nutrition for Entrepreneurs

1:06:46 to 1:10:01

Understand the significance of personalized nutrition for optimal performance and health.

“So to recap, 30 different plants a week, three different fermented foods a day.”

The Impact of Food Choices on Health

1:10:01 to 1:10:21

Explore how food choices influence health and personal goals.

“As Tim told us, we make hundreds of food choices every week.”
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Transcript

Automatic transcript. May contain errors.

0:00Hala Taha:Calorie counting just doesn't work. We've been brainwashed for the last 40 years into thinking that calories were the thing. When you look at the actual data of all the studies done, 80 or 90 percent have returned to their baseline weight and then they tend to overshoot. Dr Tim Spector is the founder of the UK's largest twin study and the co-founder of Zoe, a personalized nutrition company. This episode deep dives on how gut microbiome determines our individual response to food and why shifting focus from calorie counting to food quality is the real key to long-term health. 70 to 80 percent of people believe that if they see high protein in a product, it's healthy.

0:39Only 10 percent of people need more protein, whereas 95 percent of people need more fiber.

0:44Hala Taha:If something is labeled organic, is that something that we should take seriously or is that just hype? The certification of organic in the US is pretty poor, and you might end up paying twice as much for something that says organic. There are lots of exceptions, but food companies deliberately make food softer and faster to eat. They want you to absorb it without noticing in front of the TV. We all know that feeling where it's a big bag of Doritos or Pringles or whatever it is. They've got exactly that formula. We're reading the back of a package and looking at the ingredients. What are some red flags to show?

1:20Hala Taha:okay, this is ultra processed. If you had to look at one thing on there, even if it says low fat on the front, that's a pretty good red flag because... Tim, welcome to Young and Profiting Podcast. Great to be here. I am very excited for this interview. I can't wait to learn all about gut health and the types of foods we should be eating. And when I was studying you, one of the things that I found really interesting is that you've done an extensive amount of studies on twins. You And based on that, you realize that genetics aren't the major factor when it comes to what we eat and how it impacts us.

1:58Hala Taha:And that different foods can actually impact people with the same genetics differently, which I just thought was so mind-blowing. Can you explain to us some of the studies and research that you've uncovered via twins that helped you understand how food really impacts our bodies? It's taken me 30 years to get to this point. so it wasn't overnight. And I was a very keen geneticist, thinking that everything was genetic, and a big proponent of that. And it took really one experiment to change my mind, which was looking at identical twins who were raised together and really lived together until they were in their 20s, and looking at their gut microbes and seeing that when you looked in detail and you sequenced their gut microbes, the species they had were really very different.

2:53They only shared a small fraction of all those species and even less of the subspecies. And that was the first time in about 20-odd years that I'd seen anything really different in identical twins. Generally, they matched because they either had the same environment or they had the same genes. There wasn't this rather randomness of finding these microbes. So for me, that was a big turning point in my career as a researcher and got me moving away from genetics, which I thought was the magic bullet for everything, into this new field. this is about 15 years ago of the microbiome and gut health because for me it was perhaps this missing link between you know what we've misunderstood about food thinking that everyone who eats the same food reacts the same way and suddenly you realize well if identical twins have different microbes then they in a way react with food differently that could explain why they I have different conditions, why one gets ill, the other one doesn't, et cetera, et cetera.

4:00So that really fascinated me is this extra bit of individuality we've all got that you can see clearly in these identical twins that's quite difficult to see in the general population.

4:12Hala Taha:I don't think our listeners truly understand what microbiome means. This is a really trendy word that we're hearing. I just had Naveen Jain on the show, and he was talking about gut health and microbiome. And I'm curious to understand, like, what is the job of the microbiome? Like, what does it actually do? I know it transforms simple food into more complex food. And I don't think people quite understand, like, what is the job of a microbiome? But we use them as chemical factories. They're like a whole grouping of communities of mini pharmacies that are converting the components of the food we eat into amazingly helpful chemicals for our body.

4:56And so I think that's the best way of thinking of them is this really rich, diverse community of, you know, maybe everyone has maybe a thousand different species and subspecies inside them, all of which are producing different chemicals. and they do that depending on what you if you feed them right you get the biggest diversity of chemicals and those chemicals go on and help us in three key ways they they help our metabolism to stop us uh you may be overeating and putting on too much fat and and sorting out our heat heat and you know the general mechanics they also um are important for our nervous system so things travel up from our gut to our brain and they will determine things like our mood and influence whether inflammation your gut is going to cause depression things like this and they're also really important for our immune system and this uh we're realizing more and more how important the immune system is for every every aspect of our health because it stops us aging it It stops us getting cancer.

6:03It stops us getting allergies. You know, you name it, the immune system now is involved. So that's what they're there for. As far as we're concerned, they're just trying to survive. But we're, in a way, we give them a nice home in our gut and a place to live. We feed them every day. And in return, evolution has worked out that they provide us with a lot of these chemicals. Some of them are things like vitamins and all the B vitamins, for example, they produce, as well as lots of gut hormones for breaking down food. So it's a really close relationship we've got with them that we've evolved in millions of years, really, to have.

6:49Hala Taha:Can you give us a concrete example? What happens when we eat a piece of fruit versus when we eat something ultra-processed in terms of how our microbiome utilizes that food? Yeah, a piece of fruit that won't be absorbed in the upper part of the gut. It goes right down to the lower part, the lower intestine, so it takes longer to get there. And the skin particularly will have lots of fiber in it and also have these polyphenols, which are the defense chemicals you find in natural fruits that protect the plant, but also our microbes extract from that fruit. So they're extracting the fibers. They break it down in our gut.

7:32They use the fibers for energy and to produce other chemicals. They're like the building blocks of these chemicals we're talking about. And the polyphenols, these defense chemicals that give the color to the fruit or the bitterness, say in olive oil, they're used by the microbes as fuel. so their extra source of fuel again to make them grow better and produce more goodness now that's what should happen and that's what happened to their ancestors when we have ultra processed food upfs what happens is that most of that it's eaten very fast uh it gets mostly absorbed in the upper part of our intestine so our microbes generally don't get to see it and it has very little fiber in it.

8:21So they're basically being starved of food and the sugars and the fats are getting absorbed quite quickly with any modest interaction with our gut microbes. There's also none of these natural defense chemicals, these polyphenols. And then you've got these unnatural chemicals like artificial sweeteners, emulsifiers, preservatives, et cetera, which some of them are absorbed, but others do go into the gut where they can cause problems for our gut microbes, make them stick together, make them produce chemicals that might lead to diabetes, and have various different effects that we hadn't really thought about 10 years ago.

9:04Hala Taha:It sounds like we really should not be eating a lot of ultra-processed foods. And I definitely want to talk about how we can tell the difference between a processed food that might be okay for us versus an ultra processed food. But first, I want to understand, how do we have a healthy microbiome? What are your tips in order for us to have diversity and what should we be eating to have a healthy microbiome? Well, we get our first microbiome from our mothers, so we need to thank our mothers for that. And birthing is a messy business and that's designed that way. So a bit of your mother's microbiome gets into all our mouths during birth and then over the first next four years we slowly build up this microbiome through breast milk and that allows us to digest breast milk and then increasingly through the diversity of foods which start to then feed different microbes that we're experiencing in the in our surroundings when we're picking up you know you get lots of microbes just on food itself you get it from surfaces you get it from soil from trees you get it from your the rest of your family you get it from your playmates in in nursery school so a lot of there's microbes all over the place and they eventually settle down and the way to then nourish them is essentially to work out what they want to eat.

10:37We've come up with a few basic principles of what the microbes really want. And we did this in conjunction with the company I co-founded, Zoe. And these principles, which we're trying to sort of educate everyone with, are that microbes like to eat diversity of plants. So eating the same kale salad every day isn't going to work because each plant has different fibers and therefore it has a very different chemical composition and our microbes are fussy. And that's why we've come up with eating 30 different plants a week as a goal to try to hit that target and exceed it. And if you do that, that's the best way to get a diverse growth of all these microbes, because the more you have, the healthier you'll be.

11:28Second would be to eat the rainbow so that you're getting these defense chemicals, these polyphenols. So you pick brightly colored plants, also bitter ones. So things like dark chocolate, olive oil, coffee, even red wine have some benefits because of the polyphenols. then you've got uh eating fermented foods so uh studies have shown that if you have at least three portions of fermented food you can really really enhance your immune system and get your your gut going in ways that are different to the diversity so in a way that's a complementary system and fermented foods are contained live microbes in food um so that they're like probiotic tablets but actually living and they're in in food and they're much more diverse and then you've got other other little tricks such as um trying to eat more legumes as a source of protein rather than just raw you know big chunks of meat giving your gut a rest after so it's time restricted eating we know that your gut microbiome and the gut lining improve when you have at least 12 hours overnight when you're not eating so cutting out late night snacking then you've got um a crucial one is to cut out ultra processed foods as much as possible we can talk about which ones because they're not all the same and they're not all bad um and then finally i think the the key is to think of food and has a quality not calories because yeah the food companies want us to think about food solely in terms of macronutrients and calories.

13:15And that helps them, but it doesn't help your gut microbes. They want quality. They want real food. And we should be thinking about the quality of the food we're eating and ignore calories because calorie counting just doesn't work. Nobody in my field in nutrition now believes in them.

13:33Hala Taha:Yeah, this gives us so much to kind of dig on. So first, with the 30 different plants in a week, That can sound really overwhelming, but that also includes things like spices, correct? A teaspoon of spices counts as a plant. You're talking about every different type of nut and seed. There's many of those. You can put them in a jar, which I do every morning. So herbs, spices, nuts, seeds, even different colored vegetables. You can get carrots. You can get like Persian carrots, which are purple, different to orange ones. They have different chemical compositions. So as far as the microbes are concerned, it's a different treat for them.

14:16And yeah, it's really important.

14:18Hala Taha:I think this goes against like what is viral on social media, because everything is about meal prepping and making one meal and then eating it all week. Like that is like a big thing that a lot of health conscious people do. They're trying to eat healthy. So they're meal prepping the same meal, then eating it every day. So to your point, if you're eating like different nuts or like other ways to kind of get different food into your system, if you're meal prepping, like that's ideal. Yeah, I mean, nothing wrong with meal prepping if it's a healthy meal and you wouldn't otherwise be having healthy food.

14:50But I think finding ways to enhance the plant count and vary it a little bit is really important. that's so you know this whole concept uh is really important because it people have got used they get into a rut you know you go and you say what's my average lunch and you always have the same salad in the same place and it seems healthy but if you've got microbes you know they get bored and only those guys will survive you know we know from some of our studies that um there's a microbe inside you that only eats coffee and so if you never drink coffee this guy is never going to grow and so there might well be one for avocados or blueberries or baobab you know and so being more adventurous is part of this and and the fact that some people find it hard they say oh it's too hard i can't do that so we did actually come up at zoe with a solution a prebiotic mix of 34 plants, most of them freeze-dried, that people could add to their food.

15:55So if they were meal prepping, you just add these 30-odd extra dried plants, and that gives you the diversity. And we did a study on it. It's called Daily 30. And it actually had more effect on your gut microbes than, say, a standard probiotic. I think it's just a different mindset of what you need to do to eat well. It's to really be adventurous in what you're adding and just think, what haven't I had this week?

16:26Hala Taha:And I know we want to discuss the difference between ultra-processed food and just processed food, because a lot of guidance out there is like, don't eat anything in a box, don't eat anything in a can. But that's not necessarily true. And that's also not practical for a lot of people. Cans are generally pretty healthy. So I eat lots of stuff out of cans and often they're minimally processed and very nutritious so you buy a can of beans and if there's not too much of a sweet sauce on it or no sauce it is ideal and there's you can get 20 different types of bean just about in the united states very cheap very nutritious good source of protein but also importantly lots of different interesting fibers and then you've got um uh you know you can buy cans of tomatoes they're actually better in a in a can often than buying them from a store they've actually have they've done tests on it and some of their nutrients like lycopene which is uh preventive for some cancers like prostate cancer there's more of it in the in the in the can variety uh than not so cans are great frozen the frozen is also really good interestingly so if you buy the pure stuff i'm not talking about you know the ready meals but if you're buying just some chopped vegetables beans peas or frozen berries actually they're often at least as nutritious as the fresh ones so and that's something you can always keep in your freezer and pull out when you need it it doesn't have to be seasonal and they're very cheap So I think the idea that cheap means processed isn't always correct.

18:11And I think that's a big misconception.

18:15Hala Taha:And I also think people get confused. Like yogurt is technically processed, right? Sourdough is technically processed. So these are actually pretty healthy foods if you're getting, you know, if it has like pure ingredients and doesn't have like any funny ingredients in it. Those are technically processed foods, but still very good for you, right? Virtually everything is processed to some degree. As you said, yogurt, cheese, all the dairy products. And we know that things like yogurt have been shown to be healthy for us. So I think we need to stop worrying about that and start thinking more sensibly.

18:51Has that processing led to something unhealthy about it? And the current definitions of UPF are really far too broad. because the current definition is not a it's not a health score it's a processing score so it's saying how much uh according to these uh brazilian researchers this food has been processed in very broad categories there are only like four categories of them and um something can have very minimal amounts of processing that aren't harmful for your health and yet it's included in the top category. So I think they were fine for research at population level, the sort of stuff I do epidemiology, but not for an individual.

19:36And that's why we've come up with a new way of scoring this, that instead of 60 % of all your food being UPF, you have to avoid, we've cut it down to about 25 % of the real ones. And it's not just processing score, it's actually accounting for all the things in ultra-processed food that are bad for you, which is quite interesting, really, because up until recently, we had no clue what they were. We thought it was just the additives. People focused on these red dyes or something else, but that's just one part of the story. So we took really separate categories. So what we did at Zoe was we looked at those additives, but we only included additives we worried about that had been associated with some health problem because some additives are like vitamin C, right?

20:28So you're not going to say, I'm not going to eat that because it's got vitamin C in it or iron or something else like that. So that was one category. The second was something called hyperpalatability, whether it's, has it been designed by the food companies to make you keep eating it and never get full, right? This is this so-called bliss point in the brain that the scientists in these companies are really brilliant at. And we all know that feeling where it's a big bag of Doritos or Pringles or whatever it is. They've got exactly that formula that is that combination of the sugar, the salt, the fat that just makes you keep eating and overrides those signals.

21:14So you just stuff your face. You're not really getting the normal signals that you should be. So hyperpalatability is the second thing that we measure. And about 70 % of these foods have that particular quality. And it's good to have that warning about it. Then you've got things like the texture of the food. so we know that food companies deliberately make food softer and faster to eat and so there's been some recent studies showing giving people two identical diets and one was textured really softly the other one the original texture so one was processed same basic ingredients calories etc and those people at about nearly 400 calories more a day just because the food was softer.

22:05And we know now that generally when you're having these particular high-risk foods, you will overeat by about 500 calories a day, which is over 20 % of your intake without knowing it. And you can have the identical food made from scratch, the identical food made there. But now we're starting to understand the mechanisms. And so this is why we've come up with an app that gives you this new ultra process risk score so you can scan stuff in a store and work it out because it's not easy in your head to work out all these different combinations and this is what the manufacturers really rely on that it's so hard to tell because they've all got health claims on the front and they all look fantastic and you know lots of healthy farmers and happy people and pictures of vitamins dancing around.

23:00So it's understanding the basic science of what they're trying to do allows us to then combat it and realize, okay, this is the antidote. These are the ones you have to avoid.

23:11Hala Taha:That's really fascinating. So is the app, is it like the Zoe app, and is it available in the U.S. as well? Yes, and it's currently free to download. So if anyone's listening, it's a fantastic way, an aid to understand this whole thing. And you just use AI, you snap food or you go into a store and snap the barcode and you can learn a lot from it. So yeah, download it while it's still free. So what is some quick ways, like for reading the back of a package and looking at the ingredients, Like, what are some red flags to show, okay, this is ultra processed? And then secondly, like, what are some examples of some foods that they're making softer that we should be aware of?

23:55Assume you don't have the app, you're in a hurry, you're looking at the back. General, as a broad rule, the number of ingredients, things you don't understand. hand, if there's several that you don't know what that means, that's a sign that there's lots of processing in there. If you've got lots of emulsifiers in there, which are these things, these glues that stick the food together, that's generally a red flag. And of course, the more they've tried to color it or add taste flavors to it, it's a sign that more they've distorted the actual original structure of that food and are making it in the way that you shouldn't it also generally they're low in fiber so trying to look at the fiber count if you had to look at one thing on there generally and it might say low fat on the front that's a that's a pretty good red flag because they generally it's cheaper for them to add in other texture products like starches that are slightly sweet and remove the fat which saves them money and so you end up having more sugar and less fat and uh helping their profits so uh yeah generally look at the back um total number of ingredients i don't understand any of these you know the worst offenders are really obvious um there are some subtle ones that are quite hard the texture of the food is really important um food companies want you don't want you to chew they want you to just sort of absorb it without noticing in front of the tv then they're doing their job so i think they've really changed most meals so most ready meals you buy that you just stick in the microwave they're they're extremely soft you never get if you never know you know your pasta's never al dente when you when you've got it in a microwave meal um in the same way that it might take you time to chew there's hardly any examples of a really tough um product that takes time to chew and that i think is really important because it it doesn't contain the whole foods they're too expensive or they um they don't store very well so you won't get the the whole grains the nuts um you're getting the soft inner parts of the of the product rather than the whole thing um and And that's really the giveaway across the whole area.

26:25Everything is softer. Everything is easier to eat. Nothing really requires much in the way of chewing.

26:31Hala Taha:So when I'm online and I'm following all these fitness influencers and nutritionists that are influencers, a lot of them are telling you to track your calories, track your macros, and they're really obsessed with that. I know that you have an opposing view that calories are probably unnecessary to track, and we really need to think about the quality of our foods. Can you help us understand what we actually need to be looking for and why calories is not the right way to look at things? Yeah, well, we've been brainwashed for the last 40 years into thinking that calories were the thing to eat. And this was really led by the food companies, but also the diet industry, the classic Weight Watchers and all the others that came off of that, because it's a really easy thing to give people goals and say, right, success or failure, you've failed, it's your fault, it's not our fault.

27:32Therefore, they keep coming back and paying them more money. But I'm a scientist foremost. and when you look at the actual data of all the studies done even in trials where people are given amazing amount of support to do calorie restricted diets you know the most they can go is is about two years and the vast majority 80 or 90 percent have returned to their baseline weight by that time and then they tend to overshoot so they often do worse having gone through this so everyone you know most of these people are getting paid to get people into these programs uh there's plenty of them short-term programs easy to track your food ai now does it for you um but you know it works for six weeks you lose some weight but then you get incredibly hungry your body senses you're not getting enough energy um your fullness uh signals are not you're not being filled up and you will revert and those hunger signals just get dialed up and becomes and it becomes unbearable all you're thinking about is food and that's how we've evolved as humans so that's why you know this isn't true and and as i was saying these experiments which we did with ultra processed food we're using identical meals in terms of calories so if you think about it if you're only talking about calories um you could be out by 500 calories a day because you're eating the junk food with low calorie rather than the real low calorie made from scratch and you'll be having 20 more food in that day just because you're picking the junk and you're counting you can be counting of calories so clearly you know something's wrong with this equation it isn't a one size fits all that everybody's the same you know and why you know why should you only have 2 000 calories how you know how's that worked out um we've all got different exercise levels but it all comes this there's a there's a big industry around calories diet foods you know short-term uh goals people love a single number we you know humans are suckers for the the quick solution and oh well i just need this this is a fantastic low calorie thing um i can take it it's like the magic pill um but it doesn't work like that it's all about the hunger levels and that's why zoe you know we're trying to we say you know don't mention the c word right it's like we it's really important you've got to stop thinking about it and have more to add more to your plate you know which means more you know in bring enjoyment back into food but going back to those whole foods that have lots of fiber in it lots of diversity lots of plants um but you know still having your your meat if you like it it nothing's off the table even the occasional donut it doesn't matter as long as you've got a long-term goal that 80 of the time you're doing the right thing and that's That's really our idea is to really make people think about food in a different way because it's not about a few weeks and I can lose a few pounds.

30:58It's, you know, how do I shift everything about my body and my gut microbes in that right direction that's going to last me for decades and help my immune system and everything else? And once you start to feel better, then it becomes obvious. And our studies have also shown that if you do this and you disregard calories, you will lose weight and you actually get less hunger. So all of the trials we do, whether it's with our prebiotic, our fermented food, or following the app, hunger signals go down. And this is because when you're eating things like plants and improving your gut microbes, it's sending different signals to your brain than if you're just having low calorie junk food.

31:42And I think that's really important. We've got to get back to quality of food and not about calories and quantity.

31:50Hala Taha:Speaking of quality of food, you talk about something called the food matrix. Can you help us understand what the food matrix is? When I heard of it, I thought of the food pyramid, but I'm not sure that's the way that I should be thinking about it. No, the food matrix is really another way of talking about food structure. And it's another example of how calorie counting is way off because it will treat a bag of whole almonds the same as a bag of almond flour. and yet we know from careful experiments that if you give people almond flour they'll be getting like 20 percent more calories from that than the raw almonds uh and at the energy because if you break it down as the as the pro you know in industrial food places do into its tiniest components you're breaking apart the cells of the plant and when you do that you're releasing sugars or fats that are stored inside there.

32:55Whereas if you have the whole nuts, for example, a lot of those fats and sugars in those are not going to be absorbed until really low down, or they might actually pass out in the toilet. So that's what we're talking about women's structure. And there's lots of examples, whether it's nuts or chickpeas is another one. You know, if you have whole chickpeas rather than you mush it up as hummus, there's a slight there's a slight difference in that in how you absorb it and its effect on the body so all comes back to the quality and the more whole foods you're eating the better it is for your body and your metabolism it sort of makes sense from an evolutionary point of view because it also takes more time to eat gives your body time to react normally in the way we were evolved to do and also fills you up as it's supposed to do.

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33:46Whereas everything about the industrial process is to speed it up. And if it can get you that food down, say, you know, you finished your meal in 15 minutes or 10 minutes or whatever, then your hunger centers won't have kicked in in your brain as well. So it's all part of the same idea. So structure is very important. Again, it goes with texture and softness and all these things.

34:09Hala Taha:I want to spend a moment on your story. So I found out that your father actually passed away quite young, around 50 years old, of a heart condition. And it was kind of unexpected. And it was a turning point for you, maybe not immediately, but at some point when you had your own health scare. Talk to us about the things that have happened in your life that made you realize that things really need to be different and that even though you thought you were operating in a healthy way, you needed to change your own health. Yeah, well, there's nothing quite like, you know, personal experience or tragedy to wake you up.

34:51And, you know, for much of my 30s and 40s, you know, I was an arrogant, cocky MD. uh you know who are particularly arrogant you know confident because that's what we're trained to do um thinking that i had the answers and that you know uh we didn't learn much about food or nutrition at medical school but no one no one did but um i still had the answers because you know the pills were the answer and everything else and i you think you're in fairly invincible then you don't worry about long-term health. When I was 54, I had this mini stroke as I was on the top of a mountain in Italy and had some high blood pressure.

35:40I got better in three months, but it was a bit of a shock to the system because I suddenly realized I was so close to when my father had died. And it sort of got rid of that complacency in me. So I certainly had a bit of a reality check and said, gosh, this 20 pounds I've put on in the last 20 years, maybe it's not all muscle. A lot of men just say, hey, I'm bulking up. This is great. I didn't look fat, but it has certainly been slowly accumulating. I suddenly realized my diet was pretty terrible. Once I started researching this, I was writing a book on the microbiome at the time called The Dartmouth and I really started breaking it all apart and suddenly realizing that you know my breakfast was wrong, my lunch in the hospital, the sandwich and orange juice and a bag of chips was wrong, you know me just having lots of low-fat foods and lots of pasta and bread really wasn't very good for me and so yeah I suddenly realized that I had to change if I was going to avoid the fate of my father.

36:52And it really drove me not only to look after myself, but also to rewrite a lot of these nutritional guides because a lot of the nutritional guidelines haven't caught up with the latest science and they're always lagging at least 10 years behind. So that was really important to me, but it was a bit of a journey.

37:16Hala Taha:Yeah. And you actually basically pivoted your career at that point. And you started putting yourself in conversations. And was it hard to gain that credibility initially with other thought leaders? Because they're like, who's this guy? He came out of nowhere. Yeah, no, it was. And yeah, you get treated like shit. Who is this guy? He hasn't done 10, 20 years in the field like we have. But I was sort of used to it because I've changed careers a few times. um i started uh as a rheumatologist i was you know like a board certified rheumatologist um and then i got into epidemiology so i went back to school um did my thesis on that and then i got i had to teach myself genetics so um i i got a few you know cold shoulders doing that as well as you can imagine.

38:12So by this time, I got over that initial thing. And it's probably the reason most doctors don't change specialty is doctors don't like change. And they feel like I've spent the hard yards doing all this, you know, all my certificates on the wall, you know, why am I going to listen to this new guy? But I think it's been great, really, because it gives you a much broader a view of everything. And medicine really needs a holistic view nowadays, rather than these minute, you know, these people who have these tiny specialties that miss the point. And I think this is what I'm realizing more and more.

38:50Hala Taha:Totally. And I'm sure your work with genetics really helped you understand nutrition even more and in a different way than everybody else did. Yeah, I think that's right. And we realized we only cracked genetics when we got really big numbers. So for 10 years, I was writing lots of papers. I've written nearly 1 ,000 papers. It's crazy. But a lot of them were rubbish. They were just, in the early days, you thought this gene was associated with this. And we found the obesity gene. We found the depression gene. It was all nonsense until we got really big numbers. We're talking 10 ,000, 100 ,000 people.

39:27Then we started to see some real answers. And the same has been true in nutrition. And that's driven me both you know nutrition and gut health that's why we're doing studies now with 300 000 people which uh you know through all these members of zoe now that we can really separate uh the wood from the trees in ways that we couldn't do before and and that's been a huge lesson for me which you know the nutrition fear was quite happy to look at 20 people at a time. Generally, you know, US students, usually male, usually, you know, under 25. So not very generalizable. So I think it is, yeah, experience in other fields really important.

40:10And I think more people should definitely do it and take the plunge. Although, you know, the first time you do it, it's not easy.

40:17Hala Taha:And I think more people should get involved in this food revolution that's going on because it is so needed. Like it's, it's absolutely mind blowing to me when I have these conversations with scientists and doctors like you, when we just realized that so much of what we're eating is basically food that is not really food, but just edible and, and kind of mimics what food should be. And that these scientists that work at these food companies are modifying food in a way that makes us eat more, that makes us like hungry all the time, that's not actually giving us nutrition, that's ruining our microbiome.

40:53Hala Taha:It just seems so immoral. It is when you put it that way. But it's like, we haven't been educated. We don't get taught in school about nutrition. We've had very little way of fighting back. And as I said, we're susceptible to the easy solution, aren't we? You know, we like, we propose something, oh, this is the cure. You just have to take these pills. You can tap the crappy diet. But as long as you've got these supplements, which make huge amounts of money for those companies, you'll be fine. And then you get these influencers who are paid by the supplement companies to tell you exactly that. And again, people want a simple black and white solution.

41:35And of course, it's very complex. You know, nutrition is moved from being the most boring science subject to probably the most complex and interesting, in my view. So, you know, no doctors went into nutrition because it was too dull. That's the honest. That's why there are no real MD nutrition experts or very few of them. It was incredibly dull because, you know, after the Second World War, it was all about vitamin deficiency, not about, you know, dealing with modern food and the food industry. So it's sort of understandable why we're in this. But I think given that we have incredible power over what food choices we make, at least most of us do, not everybody, you know, but those with any sort of income, you know, we're making hundreds of food choices a week.

42:29And it's not like exercise where you have to give up, you know, several hours of every day. It's just a simple choice. You can say, I can put this in my mouth or I can, I know, I can pick something else. And that's what we're not realizing, but we've got this incredible power to change ourselves and to change our destinies and live another 10 years of healthy life just by making better food choices, not by spending lots more time in the gym.

42:59Hala Taha:Well, this is such a great segue because like you just said, we have agency, but we need to understand how to kind of understand the marketing that's getting pushed at us and what is real versus what is BS. So I thought we could play a little bit of a game where we talk about the grocery store label lies. So what do these labels actually mean and what do we need to look out for? So the first one is when we're in the grocery store and we see something that says low calorie. A lot of people will pick that up, think that's healthy for us. Why is low calorie not necessarily healthy? I'd stick that in the trash because it means that they've reduced the sugar in some way.

43:43Generally, it's the sugar they go for. And they've replaced it with something else. and that could be low quality fats like palm oil or they've added artificial sweeteners and a mix of those so um or they've just given you a very small portion size that's the other way around it so you know baby portions but generally for me it's a red flag that um i would never buy anything that says uh low calorie on it because you know unless maybe you know you wanted to switch from regular Coke to diet Coke, which is probably slightly better for you. You know, if you've got diabetes or something, yes, in those instances might be worth it.

44:27But generally, it's a red flag.

44:29Hala Taha:To me, soda in general, like don't put it in your grocery cart, right? Just avoid at all costs. Yes, the whole area is a massive red flag. And if you're not having lots of sugar, you're having lots of chemical sweeteners. And we still don't know the long-term effects of those. Okay, if something is labeled organic, is that something that we should take seriously? Or does organic not really matter? Is that just hype? Well, it sort of depends on what product you're looking at. In general, the certification of organic in the U.S. is pretty poor. so there's lots of misclassification and misselling um and you might be end up paying twice as much for something that says organic um if it's a product for example that has high pesticide or herbicide use buying an organic one is likely to give you less of that chemical so a good example might be if you have oats for breakfast every day then you'll be getting you know only 20 percent of the spray chemical on it the glyphosate or on your oats if you chose the organic one and it was true but for many products it's it's probably not worth it and i'd rather people spend their money buying you know better quality uh fruit and veg than only getting organic i mean in general though we you know we should support farmers that try and do things organic because it means they are taking more care um over those products and so there are lots of exceptions but um some things it's not worth you know um if you're worried about the spraying of chemicals and you're buying an orange well you just peel the orange you know it's got a thick skin so you're not going to get it anyway things you're having a lot of then then you might want to reduce your those uh particular risks like berries and strawberries get sprayed a lot.

46:31So again, if you're having those regularly, it might be worth it. But as a general rule, I think it's slightly overhyped. There's no big evidence of people shifting makes a massive difference. If you've got the money, go for it. If you haven't, don't worry about it.

46:47Hala Taha:Now, this is a really popular one. Now, everything says the amount of protein on the front, high protein, high protein. Is that becoming like the new low calorie, low fat? Yeah, for a year or two now, there's been protein mania. And food companies love it because there's lots of cheap protein out there they can add in powders to anything. I've seen surveys in the US showing that 70 to 80 % of people believe that if they see high protein in a product, it's healthy. And they don't look beyond the protein. so it's definitely going to replace the low calorie and you know you see this turning up in all kinds of terrible snack bars that uh look are incredibly unhealthy and they've just added a bit of soy protein or milk protein on the top and it's like protein bars that we all get yeah they're generally absolutely terrible so yeah i think that's a real red flag uh you know if you want protein get the high quality stuff uh you know uh if you want you know dairy and uh red red you know lean meat and uh things like this uh and legumes um don't buy in a chemical form because the average american is already getting uh more than enough protein there are you know a few people who are protein deficient but the vast majority of people uh unless they're sick elderly or you know, bodybuilding are not really going to be needing any extra.

48:18There's getting plenty.

48:20Hala Taha:Yeah, you say there's a fiber crisis, not a protein crisis. Like, we've got it backwards. Yeah, that's right. You know, only 10 % of people need more protein, whereas 95 % of people need more fiber. We're really deficient in the Western world on fiber. And yeah, the USA is leading the world on that. Yeah, it's something we don't want to be number one for, for sure. What about the word natural? Pretty meaningless. You know, opium is natural, isn't it? And, you know, it's sort of necessarily good for you. So, yeah, lots of natural things. Yeah, it's a meaningless term. It doesn't have a clear definition.

49:05It's used on marketing. uh again uh it doesn't mean it's necessarily bad but it's just a sign that someone's got to they're trying a bit hard to market this at you um by using a meaningless term um full of natural goodness and of course you know natural there's this definition between natural and synthetic so people are using um flavorings and colorings which might I might say a natural in those products, whereas in the past they didn't worry about that. So they realize the consumer doesn't want artificial dyes, but they would be happy if there's something called a natural dye made from carrots or beetroot.

49:53They feel a bit happier with that. But in general, yeah, it's a pretty meaningless term.

49:59Hala Taha:When something says made with real fruit, what do you think they're typically hiding? either there's virtually none in it or um they're using uh some pulp of the of the fruit and they're mixing it with other things um so a lot of yogurts and breakfast cereals have say made with real fruit uh it they don't have to say how much what percentage is is actually real fruit and uh generally you know you shouldn't have to tell a consumer it's got real fruit you should be able to see it right and generally you can't and um certainly uh things like children's yogurts and breakfast cereals have these reconstituted flavored berry flavored um bits of starch and uh crumbs that they they pass off as fruit and they might have added some puree at some point so they can claim it.

51:00Somewhere in that product is some real fruit. But generally, yeah, that's another red flag.

51:07Hala Taha:Is there anything we didn't talk about that we should be aware of when we're grocery shopping? There are some really difficult items when you're shopping. I find bread really tough, getting a good bread because they all claim to be the same. and it's often the ratio of the how much sugar there is in that bread compared to the amount of fibers in that bread and that's quite a hard calculation to do in your head um so again look really carefully uh think because people have a lot of bread you know they have it regularly so it's it's the items that you buy all the time are really important to to scrutinize and trying to get the best one so you should be looking at the highest fiber content and the relatively lower sugar amount, and you don't want a big list of chemicals as well.

51:57So that's one I find difficult.

52:00Hala Taha:Yogurt could be like really good or really bad too, right? Yeah, exactly. It's really hard in some parts of the US, I found, to get a yogurt that has nothing in it at all, apart from the milk and the microbes. Vanilla is added to standard. um you get uh sweeteners in there you get uh bits of fruit and whatever so you just got to try and get the least amount of ingredients the simplest it is uh that you know it's going to be good and particularly children's yogurt is even worse if you've got kids uh or you know then really important that you you don't get them those brightly colored ones which probably have got no live microbes in them at all and uh they'll neutralize any any of the goodness in that in that yogurt as well so i think yes the two aisles where i think you know things like the children's aisle the yogurt aisle um the bread aisle that's really where you should become an expert but some of these ones you know it may be obvious you can work it out if they're so full of uh cartoons and messages that's obvious other ones you may have to you know barcode scan it you know uh with an app like Zoe's, it can be really tough.

53:17But I think work out what you're having regularly and then always get the better version of it, I think is what we should be aiming at.

53:24Hala Taha:I learned that you had a high microplastic count in your blood at some point. How do you feel about food packaging? Are you concerned with that? I know you were talking about canned foods being okay, but I think there's aluminum in canned foods and that could be really bad for us as well. So I looked into this and I'm fairly relaxed about canned foods. You know, they've done lots of studies. They've been around for, you know, hundreds of years. But I'm more concerned now about having too much plastic and obviously clear dangers of buying, say, bottled water in plastic. You leave them in your car.

54:04It gets a bit hot. All those chemicals leak out into the water. And then if you, you know, that's part of your regular drink. that's not good so um i'm trying to cut down on my plastic containers um as much as i can and making sure also when you you might microwave or heat something up you take it out of the original plastic container and put it in some uh glass or ceramic i think we just we've got a bit complacent around plastic um it's very cheap it's you know a byproduct of the petrol industry um it's you know it's virtually forced on us it's very hard to avoid it and yeah nobody wants to be think this you know their brains are slowly filling up with microplastics um even if we even if we don't know exactly what they do again if there's a simple choice going back to my idea of you know we're constantly making these little food choices you know am i going to bother putting into another bowl yes you know do i want my water bottle to be plastic or i want it to be metal or made to something else.

55:08Hala Taha:These are very easy choices for us to make without, you know, ruining your life and getting super stressed about it because you can't avoid plastic. And I think we don't want to be so plastic phobic. We go the other way, which would make, would probably have negative effects on your mental health. Yeah. I feel like for me, one of the biggest health changes I could make is to start to just avoid plastic more often and avoid plastic water bottles. Like how do you drink your water? Like What do you use for your water at home? After my scare, I went and got water filters installed. And so my water tastes better and you get any of those microplastics filtered out.

55:52So I'm quite happy to have my filtered water. Or if I do buy specialty waters, you know, I like a nice Italian or Spanish mineral water. i'll buy in a glass bottle um and so that that works for me and yeah and i i i carry a metal water bottle with me so yeah i could do more but i reckon that you know there's a sort of very easy easy way of doing this um and no one really knows you know i had above average microplastic levels but nobody knows what's what's critical you know hopefully hopefully i'll die before I have any problems due to them, but it's very early science. I think there's probably many other things in our food that are worse for us than those, although they sound scary, but we're surrounded by a lot of these, just starving our microbes, I think is a worse crime than having a little bit of plastic every time we have a drink.

56:57Hala Taha:So I want to close out today's interviews talking about fermented foods. you just mentioned starving our microbes. And I know fermented foods is something our microbes really like. You actually changed your mind on this. You thought fermented foods was for like hippies. And then you changed your mind. So what made you change your mind about fermented foods and what should we know about them? So what really changed my mind was understanding a mechanism of how they might work. Because the field as a self-nutrition is not well funded the studies are small you know some of them are funded by dairy companies and etc um which you know can be biased so i thought well they might have some advantages but the evidence isn't very strong and there's no evidence that these microbes when you drink them say in a yogurt or a keff milk kefir they stay in your gut and they take over you know so that was always a bit odd so how do they work if they're not hanging around very long you've got to keep drinking them and they have this effect.

57:59And how are they working? Because they'd be really outnumbered in your gut, you know, because there are billions of them when you drink them, but there's trillions, hundreds of trillions of the other guys, right? So it's like you going into a football stadium and, you know, waving your hands around hoping everyone's going to notice, you know? It's like that scale. So it was a study about three or four years ago by a colleague of mine, Christopher Gardner and Justin Sonnenberg in Stanford, where they gave 28 volunteers really large amounts of fermented food, five portions a day. They took blood every day on these guys.

58:43And they noticed that after two weeks, they'd reduced the inflammation levels in their blood by about 25%. And that was the first time anyone had really shown in a proper, really high-level experiment that microbes have this effect. And they have an effect that we didn't expect, I didn't anyway, that it would be directly on the immune system, not by just inhabiting our gut microbes. They're tickling something in our gut that is sending signals to the rest of the body to say, calm down, relax. It's like having low dose of steroids, really. and to me that was a game changer i said wow suddenly we've got a mechanism here we know how it works and then i went and i did a because it was only 28 people usually you know young males uh as always in these studies so we did a real life study with zoe we got um uh we asked 9 000 zoe members to do a citizen science study and take fermented foods they weren't fermented food people and we asked them to take three portions a day for two weeks and six and a half thousand did it a thousand more dropped out they didn't like it but those that did go to the end and take it over 50 of them felt better in terms of mood energy and hunger and they can all be related to inflammation and brain effects and to me those those two studies plus you know all this old literature that have been around there convinced me that these have a really important effect on our immune system via our gut microbes and we should be having much more of it in our in our diets and, you know, they're not.

1:00:29And until recently, you know, they haven't been recommended, although the latest U.S. guidelines, they've now put them back in really as a, and the gut microbiome for the first time this year suddenly got a place.

1:00:43Hala Taha:What are some examples? So there's like kombucha, yogurt, kefir, any other big ones that you think we should be aware of? I remember by the four Ks. So I get kombucha, kefir or kefir, which is fermented milk. You've got kimchi, which the national dish of Korea, which is one of the best ones because it's got so many microbes in it. And then you've got krauts. So that's things like sauerkraut, but also could be beetroot kraut or any vegetable you can make into a kraut. um then you've got um all the japanese dishes so anything based on soy fermented soybeans so that includes um miso uh miso soup miso paste um which i now use instead of a stock cube um make my own miso and you know suddenly it's in everything and it tastes amazing and then you've got other things called there's a something called tibikos or water kefir, which I think is going to get more attention.

1:01:49Again, it's a bit like kombucha, but you add fruits to it and it's really exciting. And every country has got its own fermented food, apart from the English-speaking countries, which seem to have got rid of them pretty quickly. If you travel around, you'll go to Africa, you get various porridges and other ferments you go to india they've got uh lots of ferments there and lassies and things like this that um are made made with ferments so uh there are hundreds hundreds if not thousands of different ferments around the world and uh yeah you can either buy them in a store make them yourself you know that's why i wrote my book ferment which is really trying to understand the science of this and try to get more people having ferments because I think the goal should be to get trying at three ferments a day.

1:02:43And if you also think that some of the things you don't think of as fermented, you've got cheese, of course, and just got to make sure it's real cheese. It doesn't come in a plastic wrapper. And I've had a cheese on my shelf from that famous brand Kraft that's lasted five years. It's still nice and orange and shiny. there's not many microbes there. But interestingly, I did do an experiment on Philadelphia cream cheese, one of America's favorite. That's got some live microbes in it. So that probably means it's also good for you. So there's lots of stuff out there. You just got to, again, think about food in a different way.

1:03:25What can I add? And you can add these things to your meals. You can start using yogurt or kefir instead of cream. um you can um put all these these mixes you can put add your krauts to soups or curries lots lots of things you can you can do to get ferments in your diet and start slowly you don't have to go uh hardcore that's the other thing now for the listener who's an entrepreneur and

1:03:54Hala Taha:they're obsessed with hustling working hard productivity performance thinking clearly and maybe their motivation for eating right isn't necessarily like longevity, but it's more about how do I like decrease my brain fog, have a better mood and be more productive? What do you want to say to them? All the experiments we've done at Zoe have shown that the first effects of improving your diet from a gut point of view are in the brain. And if you value your brain and you want to improve your mood and your energy your tiredness then a gut-friendly diet is the way to go and it doesn't matter whether you're just shifting yourself a little bit towards more fiber and more diversity give yourself fermented foods or you're actually taking you know our prebiotic supplement on top of your food they all work and you know my mood has really improved since i started doing this and and it's something people don't associate with food um i think that's the other important thing that um we're never told you know oh what you had for breakfast could influence how you feel three hours later but it does and it and you only notice it when you start to record it and that's what we're trying to do is to get people to make this link between the food they chews or what they ate last night you know how much gap they left overnight but you know by me if i went back to my old way of having breakfast which was you know um you know granola uh an orange juice a bit of low-fat milk and tea or maybe a bagel or a croissant you know compared to what i have now which is you know a yogurt a kefir nuts seeds my daily 30 and some berries is it's night and day three hours later.

1:05:51You know, I don't need, you know, a double coffee and a chocolate biscuit or a snack at 11 o 'clock in the morning. You know, I'm full and I'm mentally focused. So I'd say to anyone listening, give it a go, and you'll notice the difference in two weeks. If you think about, you know, if you're recording what your energy and mood levels are before and after. and you're focused on it. And hopefully in the app, we haven't got it there yet, but we're going to start having a way of people can track their mood and energy, which I think will be a real step forward in this because doctors never ask it.

1:06:33It's just not something that we don't talk about really. You know, we always assume it's other factors. It's the fact that I've got a busy life, I don't sleep well. We don't actually make that link with food, but it is, I've learned it's really crucial.

1:06:46Hala Taha:So to recap, 30 different plants a week, three different fermented foods a day. Any other big ones that you want to call out? Yeah, lots of bright color on your plate. So you're eating the rainbow. You've got lever gap, so no late night snacking. So you're getting at least 12 hours overnight. Switch protein source, get lots of legumes in there. Beans, lentils, chickpeas, all those things are really good for you. So cut out your UPFs as much as you can. Maybe use our app if that's helpful for you. And forget about calories. And I think do all those things and you'll be a new person. Amazing. Well, Tim, thank you so much for joining us on Young and Profiting Podcast.

1:07:37Hala Taha:Where can everybody learn about what you do and where can they find you? You can follow me on Instagram and all the things I've been talking about. There's research studies at Zoe, at Zoe.com. Our website there has got all our research papers. We've got over 70 research papers from the team there, as well as the products that are available. And yeah, so, and we also have a podcast. So the Zoe Nutrition and Science Podcast is also another free to listen to for anyone who's out that wants to dive deeper into this area. The Zoe Podcast and YouTube channel is actually like huge. So we'll stick all those links in the show notes.

1:08:21Hala Taha:I found it really entertaining and educational. So, Dr. Tim, thank you so much for joining us on Young and Profiting Podcast. It's been a pleasure. Yeah, fam. This conversation with Tim challenged one of the biggest assumptions we've been taught about nutrition. that if we eat healthy foods, we all get the same healthy results. Tim's research showed that even identical twins with identical genetics can have dramatically different gut microbiomes. That helps explain why some meals can leave one person energized while the other person feels depleted and hungry. It's a great lesson to stop chasing generic advice from social media and start paying attention to your own body signals.

1:08:57Hala Taha:When it comes to nutrition, personalized data will always be trendy one-size-fits-all solutions, and that's really the future of healthcare and nutrition. Tim also encouraged us to stop obsessing over calorie counting and start focusing on food quality. As he said, think of foods in terms of quality, not calories. Calories don't tell you how a food impacts your microbiome, your hunger, your immune system, or what long-term health benefits they have. Instead, focus on feeding the trillions of microbes that help power your body. Aim for roughly 30 different plant foods each week. This can seem overwhelming, but it also includes herbs, spices, nuts, and seeds.

1:09:34Hala Taha:Add fermented foods like kefir, kimchi, sauerkraut, or yogurt into your routine. And rather than avoiding all processed foods, which some processed foods like frozen foods and canned beans are actually good for you, learn to recognize and limit ultra processed foods that are engineered to keep you eating more and hungry. For entrepreneurs, this isn't just a health conversation. It's a performance conversation. Your focus, energy, resilience, and decision-making all depend on the fuel that you give yourself. As Tim told us, we make hundreds of food choices every week. Those choices add up. So the next time you're standing in the grocery store, don't just ask, how many calories are in this?

1:10:13Hala Taha:Ask yourself, what is this doing for the person I'm trying to become? And is this healthy for my microbiome? Thank you for joining me on this episode of Young and Profiting. Every week, you're investing in your growth, your future, and the impact you want to make in the world. So if this episode changed the way that you think about what's on your plate, share it with a friend, family member, or anyone who needs a more freeing way to think about food. Until next time, it's your host, Halataha, aka the Podcast Princess, signing off.

From the publisher

After decades of human health research, Dr. Tim Spector believed our genes largely determined why people got sick, gained weight, or aged the way they did. But 30 years of studying identical twins revealed something unexpected: people with the same DNA could respond to the same foods in completely different ways. That breakthrough led him to uncover the powerful role of the gut microbiome and co-found ZOE, a company focused on personalized nutrition and gut health. In this episode, Dr. Tim exposes the biggest diet myths and shares simple habits to improve gut health, boost energy and productivity, and support long-term health, without obsessing over calories.

In this episode, Hala and Dr. Tim will discuss: 

(00:00) Introduction

(01:30) What Twin Studies Reveal About Food

(04:11) How the Gut Microbiome Works

(10:32) Building a Healthier Gut Microbiome

(17:46) Processed vs. Ultra-Processed Foods

(31:22) Does Calorie Counting Work?

(36:42) The Food Matrix and Food Structure

(39:03) Dr. Tim’s Health Wake-Up Call

(47:50) Grocery Store Label Lies Exposed

(1:02:00) Fermented Foods for Energy and Focus

(1:08:54) Gut Health Tips for Entrepreneurs 

Dr. Tim Spector is a professor of genetic epidemiology at King’s College London and director of the TwinsUK registry, one of the world’s largest twin studies. He is the scientific co-founder of ZOE, a nutrition science company built on gut microbiome research, and has published more than 900 research papers, placing him among the top 100 most-cited scientists in the world. He is the bestselling author of several books on nutrition and gut health, including The Diet Myth, Spoon-Fed, Food for Life, and Ferment. 

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Resources Mentioned:

Dr. Tim’s Company, ZOE: zoe.com  

Dr. Tim’s Book, The Diet Myth: bit.ly/DietMyth 

Dr. Tim’s Book, Ferment: bit.ly/-Ferment 

Dr. Tim’s Instagram: instagram.com/tim.spector

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