Professor Tim Spector: I was wrong about Vitamin D & sunlight! The 7 health habits he's changed his mind about

Professor Tim Spector: I was wrong about Vitamin D & sunlight! The 7 health habits he's changed his mind about

What health habits actually protect your brain and long-term health? In this episode, Professor Tim Spector shares the seven health ideas he has changed his mind about after reviewing new research. From oral health and inflammation to vitamin D, sleep, and exercise, Tim explains the daily habits he now prioritises and helps us understand what we should do differently if the science changes. Tim revisits 7 common health beliefs and explains how new evidence has shifted his thinking. He explores the link between oral health, inflammation and brain ageing, and discusses vitamin D, sunlight and omega-3s. The conversation also looks at sleep timing, exercise and how everyday habits interact with our biology. Tim also shares the small changes he now makes in his own routine and provides practical ideas for incorporating them into your daily life. We all know that science evolves as new evidence emerges, so if the research changes, should our daily health habits change too? 🌱 Try our science-backed and tasty wholefood supplement Daily 30+ 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. Timecodes 00:00 Intro 04:00 The nutrition advice scientists completely reversed 08:30 How scientists decide if a health trend is real 10:30 The vitamin D discovery that fooled scientists for years 12:35 The one health belief Tim is more convinced about than ever 14:00 The public health threat Tim says may be worse than smoking 15:20 The new research linking oral health to dementia 17:05 How mouth bacteria may affect your brain 18:20 The test that revealed plastic in Tim’s blood 20:15 The simple changes Tim made to reduce microplastics 21:40 The omega-3 test most doctors still don’t use 23:05 Why Tim chose food over omega-3 supplements 24:50 The omega-3 measurement scientists now care about most 26:40 Should vegans worry about omega-3? 29:25 The vitamin deficiency Tim has had since he was 18 31:20 The surprising brain benefits of folic acid 33:10 Why supplements should be personalised 34:30 Why Tim changed his mind about vitamin D 36:15 The simple way sunlight doubled his vitamin D 38:10 Why we shouldn’t fear winter sun 39:45 The exercise change Tim made this year 42:05 The muscle supplement Tim thought was “complete rubbish” 43:30 The sleep rule Tim now follows every night 45:30 The unusual sleep experiment Tim tried 📚Books by our ZOE Scientists The Food For Life Cookbook Every Body Should Know This 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 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 What is your gut-brain connection and what role does nutrition play? Oral Health and Dementia, Journal of Dental Research (2025) Neuroinflammation: A Distal Consequence of Periodontitis, Journal of Dental Research (2022) Vitamin D Supplementation and the Incidence of Fractures, JGIM (2024) Does a good diet reduce your heart disease risk? Vitamin B12 and Age-Related Cognitive Decline-Dementia and "Alzheimer's Disease", FNB (2024) Vitamin D and Risk for Type 2 Diabetes, Annals of Internal Medicine (2023) Effects of Creatine Supplementation and Resistance Training, Nutrients (2024) Why you're probably breathing wrong (and what to do about it) | James Nestor Have feedback or a topic you'd like us to cover? Let us know here. Episode transcripts are available here.

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Episoder(355)

Most replayed moment: How to stop fighting your body clock | Prof. Debra Skene

Most replayed moment: How to stop fighting your body clock | Prof. Debra Skene

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How to eat to lower inflammation - the top 5 foods to boost energy, stop pain, and to live longer | Prof Luke O’Neill

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Most replayed moment: The hidden dangers of hearing loss | Prof. Marcelo Rivolta

Most replayed moment: The hidden dangers of hearing loss | Prof. Marcelo Rivolta

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29 Sep 9min

Inside Tim Spector’s weekly food shop - 6 grocery rules to lower your blood pressure, cholesterol, and heart disease risk | Prof Tim Spector & Prof Sarah Berry

Inside Tim Spector’s weekly food shop - 6 grocery rules to lower your blood pressure, cholesterol, and heart disease risk | Prof Tim Spector & Prof Sarah Berry

Supermarket shelves are full of foods promising to be healthy: high-protein, low-fat, gluten-free, sugar-free. How do you know what's true? Today, Professors Tim Spector and Sarah Berry, world-leadi...

24 Sep 1h 2min

Most replayed moment: What your wearable is really telling you | Dr Malcolm Finlay

Most replayed moment: What your wearable is really telling you | Dr Malcolm Finlay

From smartwatches to fitness trackers, more of us than ever are monitoring our health in real time. With just a glance at our wrist, we can check our step count, sleep quality, heart rate and, more re...

22 Sep 14min

Is your gut the secret to anti-aging? 6 science-backed ways to boost your bone strength, muscle, and balance | Prof Elaine Dennison

Is your gut the secret to anti-aging? 6 science-backed ways to boost your bone strength, muscle, and balance | Prof Elaine Dennison

Picture the sound of a bone snapping - the kind of sound that makes you wince - and ask yourself how often you’ve thought about your bone health. Most of us only think about bone density when somethi...

17 Sep 55min

Most replayed moment: How to build a better breakfast | Prof. Ben Gardner & Tim Spector

Most replayed moment: How to build a better breakfast | Prof. Ben Gardner & Tim Spector

We’ve all heard the saying: Breakfast is the most important meal of the day. And while it may sound like a cliché, there’s some truth to it. Because for many of us, breakfast is the one meal we keep t...

15 Sep 14min

The science behind food that isn’t food, why you love it and why you should not fear it all | Prof Tim Spector & Prof Sarah Berry

The science behind food that isn’t food, why you love it and why you should not fear it all | Prof Tim Spector & Prof Sarah Berry

Are some of your "healthy" foods actually high-risk ultra-processed foods? For decades, nutrition advice seemed relatively straightforward. Eat less sugar. Less salt. Less saturated fat. Then it all...

10 Sep 1h 13min

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