ZOE Science & Nutrition

Why is it so hard to stop eating certain foods? Most of us assume it comes down to willpower. But according to today’s guests, the answer may actually lie in the difference between taste and flavour. Because while those two words sound interchangeable, they describe very different experiences.

Taste is often engineered - carefully designed by big food companies to keep us craving more. Flavour, on the other hand, is something deeper. It’s the rich, complex experience that comes from high-quality produce.

Today, Spencer Hyman and Professor Tim Spector explain how ultra-processed foods manipulate our brains and why rediscovering flavour could help us eat less without feeling deprived. They’ll reveal practical ways that you can retrain your palate and reconnect with real food.

🌱 Try our science-backed and tasty wholefood supplement Daily30

🌿Let your gut microbes snack on the ZOE Gut Health Bar

Get our brand-new app and Gut Health Test designed by world-leading gut health and nutrition scientists to build healthy eating habits 👉 Join ZOE

Follow ZOE on Instagram.

📚Books by our ZOE Scientists

The Food For Life Cookbook

Every Body Should Know This by Dr Federica Amati

The Appetite Reset by Dr Federica Amati

Food For Life by Prof. Tim Spector

Ferment by Prof. Tim Spector

Good Mood Food (preorder) by Prof. Tim Spector

Free resources from ZOE

The Smart Snacking Guide: How to feed your gut, fuel your day, and snack without guilt

The Hormone Harmony Guide: Tuning Your Body’s Internal Orchestra  

Eating for Better Brain Health: Your brain-gut blueprint

How to eat in 2026 - Discover ZOE’s 8 nutrition principles for long-term health

Live Healthier: Top 10 Tips From ZOE Science & Nutrition

Gut Guide - For a Healthier Microbiome in Weeks 

Better Breakfast Guide

Have feedback or a topic you'd like us to cover? Let us know here.

Episode transcripts are available here.

Can using food as medicine protect your heart health, prevent chronic disease, and help you live longer?

In this episode, leading cardiologist and Director of the Food is Medicine Institute, Dr Dariush Mozaffarian, explains how modern diets increase your risk of heart attacks and why standard medical advice often falls short.

Dariush looks at how past dietary guidelines shaped today’s food system and why shifting focus to whole, protective foods improves your health. He also explains why counting calories fails, shows how ultra-processed foods took over our food supply, and asks whether saturated fat deserves its reputation as a cause of heart disease.

Through the idea that food is medicine, you’ll learn how to adopt healthy eating habits by identifying protective foods - forming practical diet shifts that can control your blood sugar, lower cholesterol, support your gut health, and cut your risk of heart attacks and strokes.

What if the most effective prescription for a longer, healthier life is already on your plate?

🌱 Try our science-backed and tasty wholefood supplement Daily30

🌿Let your gut microbes snack on the ZOE Gut Health Bar

Build healthy habits. Download the ZOE app today 👉 Join ZOE

Follow ZOE on Instagram.

Timecodes

00:00 Intro

04:22 Is a poor diet deadlier than smoking?

09:13 Why the foods you're missing may harm you more than junk food

10:33 Could diet prevent half of all heart attacks and strokes?

11:29: Can diet reverse gut problems in months?

14:25 Why diet-related disease exploded in just 35 years

15:40 Nutrition science is younger than you think

17:51 Why poor nutrition became a national security threat in 1941

19:27 Why do we refine grains, then put the vitamins back in?

21:03 How bomb factories changed the food on your plate

24:46 Why did we go low-fat? The 1980 dietary guidelines mistake

26:45 Did tobacco companies really own food brands?

31:09 The 3 things driving the rise of chronic disease

33:52 Is fat really the problem?

36:38 Exercising more but still gaining weight? Here's why

37:33 Has our resting energy expenditure gone down?

39:28 Is modern food starving your gut microbes?

41:02 Are dietary guidelines any good? A cardiologist’s verdict

43:02 What do dietary guidelines say to avoid?

45:37 Do we really need more protein?

47:21 Healthy eating made simple: 3 food groups to know

48:17 How many calories does your gut microbiome digest?

52:29 Is red meat bad for you?

54:11 Is saturated fat bad for your heart?

56:21 How to lower cholesterol with food: a cardiologist's 2 tips

57:13 Should your doctor prescribe food?

1:00:37 Can we fix the food system in 10 years?

📚Books by our ZOE Scientists

The Food For Life Cookbook

Every Body Should Know This by Dr Federica Amati

The Appetite Reset by Dr Federica Amati

Food For Life by Prof. Tim Spector

Ferment by Prof. Tim Spector

Good Mood Food (preorder) by Prof. Tim Spector

Free resources from ZOE

The Smart Snacking Guide: How to feed your gut, fuel your day, and snack without guilt

The Hormone Harmony Guide: Tuning Your Body’s Internal Orchestra

Eating for Better Brain Health: Your brain-gut blueprint

How to eat in 2026 - Discover ZOE’s 8 nutrition principles for long-term health

Live Healthier: Top 10 Tips From ZOE Science & Nutrition

Gut Guide - For a Healthier Microbiome in Weeks

Better Breakfast Guide

Mentioned in today's episodeFood Additives: Emerging Detrimental Roles on Gut Health, FASEB journal (2025)

Diet Is the Single Most Important Predictor of Health, Alternative and Complementary Therapies (2019)

Total daily energy expenditure has declined over the past three decades, Nat Metab (2023)

Fermented foods have evolved from a niche health trend into a supermarket staple. Kefir, kimchi, kombucha. Our shelves are now filled with products rich in beneficial bacteria.

But with so many options to choose from, it can be difficult to know where to begin.

Today, Professor Tim Spector shares simple, practical ways to incorporate fermented foods into your daily meals. He’ll also show why fermenting at home is much easier than most people think, taking us inside his fridge to demonstrate how to make four of his favourite homemade ferments.

🌱 Try our science-backed and tasty wholefood supplement Daily30

🌿Let your gut microbes snack on the ZOE Gut Health Bar

Get our brand-new app and Gut Health Test designed by world-leading gut health and nutrition scientists to build healthy eating habits 👉 Join ZOE

Follow ZOE on Instagram.

📚Books by our ZOE Scientists

The Food For Life Cookbook

Every Body Should Know This by Dr Federica Amati

The Appetite Reset by Dr Federica Amati

Food For Life by Prof. Tim Spector

Ferment by Prof. Tim Spector

Good Mood Food (preorder) by Prof. Tim Spector

Free resources from ZOE

The Smart Snacking Guide: How to feed your gut, fuel your day, and snack without guilt

The Hormone Harmony Guide: Tuning Your Body’s Internal Orchestra  

Eating for Better Brain Health: Your brain-gut blueprint

How to eat in 2026 - Discover ZOE’s 8 nutrition principles for long-term health

Live Healthier: Top 10 Tips From ZOE Science & Nutrition

Gut Guide - For a Healthier Microbiome in Weeks 

Better Breakfast Guide

Have feedback or a topic you'd like us to cover? Let us know here.

Episode transcripts are available here.

Can what you eat protect your memory, ease brain fog, and lift your mood?

For a long time, we thought the brain was separate from the rest of the body. It's easy to assume that mood, energy, and memory have little to do with what's on your plate.

But in today's episode, one of the world’s leading experts in nutrition, Professor Tim Spector, explains how your gut health shapes your brain health. From low energy and anxiety today to dementia in later years, he shares what to eat to protect your brain throughout your life. Tim shares nine foods to add to your diet - from mushrooms and eggs to tofu and fermented foods - with easy ways to eat more of them, all drawn from his new book, Good Mood Food.

By the end of the episode, you will have learned quick, budget-friendly recipes that support the gut-brain connection and will clearly understand the four principles you need to start boosting brain function today.

What if your tiredness, brain fog, and low mood are linked to the food on your plate? What might change if you ate differently for two weeks?

🌱 Try our science-backed and tasty wholefood supplement Daily30

🌿Let your gut microbes snack on the ZOE Gut Health Bar

Build healthy habits. Download the ZOE app today and start your trial for just £2.30 for your first week. 👉 Join ZOE

Follow ZOE on Instagram.

Timecodes

00:00 Intro

04:24 Why better gut health shows up in your brain first

06:05 Gut-brain connection explained: the vagus nerve is 80% gut to brain

10:30 Is the “chemical imbalance” theory of mental illness wrong?

12:28 What a week of fried chicken does to your brain

15:20 How a gut-friendly diet sends calming signals to your brain

17:17 How inflammation and blood sugar spikes damage brain cells

19:33 Does type 2 diabetes really triple dementia risk?

23:03 SMILES trial: can a gut-friendly diet ease depression?

26:06 How many plants should you eat per week? 30 or 40?

28:22 Why ultra-processed food is bad for your brain:t’s not just additives

29:56 Can intermittent fasting lift your mood?

32:44 Always tired? Why it might be a brain signal

36:19 Healthy comfort food: mac and cheese, fish and chips

39:16 Are mushrooms linked to 25% lower dementia risk?

42:18 Are eggs good for brain health? How many a week is OK?

44:03 Best omega-3 foods for brain health: the SMASH fish rule

46:27 Is tofu good for your brain? How to cook it in 30 seconds

49:52 Do herbs and spices help your brain? What we know so far

52:10 Is your brain really made of fat? Why nuts and seeds matter

54:29 Do you need to soak beans and lentils for hours?

56:41 Don’t pour away chickpea water: egg white swap

58:52 Does heating fermented foods kill the benefits? Postbiotics explained

1:00:17 Where to start for better mood and brain health: try this for 2 weeks

📚Books by our ZOE Scientists

The Food For Life Cookbook

Every Body Should Know This by Dr Federica Amati

The Appetite Reset by Dr Federica Amati

Food For Life by Prof. Tim Spector

Ferment by Prof. Tim Spector

Good Mood Food (preorder) by Prof. Tim Spector

Free resources from ZOE

The Smart Snacking Guide: How to feed your gut, fuel your day, and snack without guilt

The Hormone Harmony Guide: Tuning Your Body’s Internal Orchestra

Eating for Better Brain Health: Your brain-gut blueprint

How to eat in 2026 - Discover ZOE’s 8 nutrition principles for long-term health

Live Healthier: Top 10 Tips From ZOE Science & Nutrition

Gut Guide - For a Healthier Microbiome in Weeks

Better Breakfast Guide

Mentioned in today's episode

Good Mood Food (preorder) by Prof. Tim Spector

The ZOE METHOD study, ZOE (2024)

Daily30: Does it work?, ZOE (2026)

ZOE’s Fermented Food study, ZOE (2025)

The ‘SMILES’ trial, BMC Med (2017)

Type 2 Diabetes and Dementia, J Int Neuropsychol Soc (2004)

The Big IF Study, ZOE (2023)

Mushroom Consumption and Dementia, J Am Geriatr Soc (2017)

Egg Consumption and Brain Function, Nutrients (2024)

Tofu Consumption and Reduced Cancer Risk, Nutrients (2024)

Unlocking Saffron’s Potential in Brain Health⁠, Cureus (2025)

Episode transcripts are available here.

Sleep. It’s a bizarre process when you think about it. We lie down, close our eyes, and before we know it, we’re waking up the next morning with a head full of hazy dreams.

Because of its mysterious nature, sleep has long been surrounded by all kinds of strange ideas and theories about what might help or harm it. From cheese causing nightmares to turkey making you sleepy.

So today I’m joined by sleep expert Dr Sophie Bostock to separate fact from fiction. She’ll debunk common sleep myths and share simple, practical tips you can use tonight to improve your sleep.

🌱 Try our science-backed and tasty wholefood supplement Daily30

🌿Let your gut microbes snack on the ZOE Gut Health Bar

Get our brand-new app and Gut Health Test designed by world-leading gut health and nutrition scientists to build healthy eating habits 👉 Join ZOE

Follow ZOE on Instagram.

📚Books by our ZOE Scientists

The Food For Life Cookbook

Every Body Should Know This by Dr Federica Amati

The Appetite Reset by Dr Federica Amati

Food For Life by Prof. Tim Spector

Ferment by Prof. Tim Spector

Good Mood Food (preorder) by Prof. Tim Spector

Free resources from ZOE

The Smart Snacking Guide: How to feed your gut, fuel your day, and snack without guilt

The Hormone Harmony Guide: Tuning Your Body’s Internal Orchestra  

Eating for Better Brain Health: Your brain-gut blueprint

How to eat in 2026 - Discover ZOE’s 8 nutrition principles for long-term health

Live Healthier: Top 10 Tips From ZOE Science & Nutrition

Gut Guide - For a Healthier Microbiome in Weeks 

Better Breakfast Guide

Have feedback or a topic you'd like us to cover? Let us know here.

Episode transcripts are available here.