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ZOE Science & Nutrition

ZOE Science & Nutrition

By: ZOE
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 The world’s top scientists explain the latest health, nutrition, and gut health research and translate it into practical advice to improve your health & weight. Join ZOE Science & Nutrition, on a journey of scientific discovery. Hosted by Jonathan Wolf.Copyright 2024 ZOE Hygiene & Healthy Living Science
Episodes
  • Which supplements work — and which are a waste | Prof. Tim Spector & Prof. Sarah Berry

    Which supplements work — and which are a waste | Prof. Tim Spector & Prof. Sarah Berry
    Jun 5 2025
    Can pills and powders really improve our health? Despite their clinical look, most supplements aren’t tested with the scientific rigour we expect from medical treatments, and many don’t live up to their promises. Today, we're joined by two of ZOE’s top scientists to uncover the truth. They share groundbreaking new research and reveal the results of a brand new randomized controlled trial that could reshape how we think about supplements and introduce an entirely new kind. Tim Spector is one of the world’s top 100 most cited scientists, a professor of epidemiology, and ZOE’s scientific co-founder. He’s joined by Dr. Sarah Berry, a world leading expert in large scale human nutrition studies, Professor of Nutrition at King’s College London, and Chief Scientist at ZOE. By the end of this episode, you’ll have the latest science to help you make informed decisions about supplements and understand what your gut health really needs in 2025. 🥑 Make smarter food choices. Become a member at zoe.com - 10% off with code PODCAST Follow ZOE on Instagram. Timecodes 00:00 Can supplements actually harm your health? 02:55 Why vitamin pills can do more harm than good 05:45 The truth behind scurvy, rickets, and early nutrition 08:30 Why we’re still stuck in a post-war supplement mindset 11:15 Should you supplement if you’re not deficient? 14:00 What calcium supplements are really doing to your heart 16:50 The real reason food companies add vitamins 19:20 The problem with your diet isn’t deficiency 21:45 Why fixing your diet is harder than it sounds 24:30 Why we need a new kind of supplement 27:10 Whole plants vs powders: why structure matters 29:40 Why plant diversity is the future of gut health 32:10 What’s the difference between prebiotics and probiotics? 35:05 Inside the randomized trial testing a new gut supplement 37:45 The science behind measuring real health impact 40:00 How the gut supplement changed the microbiome 42:30 Why probiotics worked… but much less 45:10 The surprising link between microbes and mood 48:20 How much did cholesterol and inflammation improve? 51:30 Could this reshape how we supplement in the future? 📚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 SpectorFree resources from ZOE Live Healthier: Top 10 Tips From ZOE Science & Nutrition Gut Guide - For a Healthier Microbiome in Weeks Mentioned in today's episode The Evolution of Science and Regulation of Dietary Supplements: Past, Present, and Future, The Journal of Nutrition (2024) Supplemental Vitamins and Minerals for Cardiovascular Disease Prevention and Treatment, Journal of the American College of Cardiology (2021) Long-term multivitamin supplementation and cognitive function in men: a randomized trial, National Library of Medicine (2013) A diverse high-fibre plant-based dietary intervention improves gut microbiome composition, gut symptoms, energy and hunger in healthy adults: a randomised controlled trial, MedRxiv (2024) On calcium supplementation: Dietary calcium intake and risk of fracture and osteoporosis: prospective longitudinal cohort study, British Medical Journal (2011) Vitamin D and Calcium for the Prevention of Fracture: A Systematic Review and Meta-analysis, JAMA (2019) Have feedback or a topic you'd like us to cover? Let us know here. Episode transcripts are available here.
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    56 mins
  • Recap: Do you need to eat meat to build muscle? | Simon Hill & Will Bulsiewicz

    Recap: Do you need to eat meat to build muscle? | Simon Hill & Will Bulsiewicz
    Jun 3 2025
    Today we’re diving into protein. It’s the nutrient at the centre of some of the biggest debates in nutrition - especially when it comes to building muscle. And as more people adopt plant-based diets, one question keeps coming up: Can non-meat proteins really support strength and overall health? So, what does the science say? Is it better to get our protein from animals or plants? I’m joined by nutrition expert Simon Hill and Dr. Will Bulsiewicz to break down the benefits of both, and to explore how we can build muscle in the healthiest, most sustainable way. 🥑 Make smarter food choices. Become a member a zoe.com - 10% off with code PODCAST 🌱 Try our new plant based wholefood supplement - Daily30+ *Naturally high in copper which contributes to normal energy yielding metabolism and the normal function of the immune system 📚 Books from our ZOE Scientists:The Food For Life Cookbook by Prof. Tim Spector Food For Life by Prof. Tim Spector Every Body Should Know This by Dr Federica Amati Free resources from ZOE: Live Healthier: Top 10 Tips From ZOE Science & Nutrition Gut Guide - for a healthier microbiome in weeks Have feedback or a topic you'd like us to cover? Let us know here Listen to the full episode here
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    15 mins
  • Harvard Doctor: Obesity, cancer, and the real cost of convenience food | Dr. Andy Chan

    Harvard Doctor: Obesity, cancer, and the real cost of convenience food | Dr. Andy Chan
    May 29 2025
    Ultra-processed foods now make up over half of what many of us eat - and the health consequences are only just coming into focus. In this episode, we reveal what’s really happening inside your body when you eat these foods daily. Our guest is Dr. Andy Chan, a Harvard professor and leading expert on gut health and cancer prevention. He heads the Clinical and Translational Epidemiology Unit at Massachusetts General Hospital and has published over 400 scientific papers. Dr. Chan breaks down the hidden links between UPFs, inflammation, and diseases like obesity, diabetes, and colorectal cancer. You’ll hear why some foods that look healthy on the shelf may be doing long-term damage - and how the gut microbiome plays a crucial role in the process. This is the research big food companies don’t want you to hear. If you care about what you and your family are eating, don’t miss this conversation. Unwrap the truth about your food 👉 ⁠Get the ZOE app 🌱 Try our new plant based wholefood supplement - Daily 30+ Follow ZOE on Instagram. Timecodes 00:00 How much of our food is ultra-processed? 02:24 Can UPFs increase cancer risk in children? 04:48 Why our kids get sicker, earlier 07:12 How convenience took over our food choices 09:36 Are food companies engineering addiction? 12:00 UPFs and early onset cancer 14:24 Why calorie counting misses the point 16:48 Can a mother’s diet shape her child’s future health? 21:36 Is a poor diet as harmful as smoking in pregnancy? 26:24 Preservatives vs calories: what’s more harmful? 28:48 Brand new science: not all UPFs are equal 31:12 ZOE’s new processed food risk scale 38:24 Why UPF labels are misleading and confusing 40:48 A simple trick: how to spot UPFs on food labels 43:12 Should schools and offices be UPF-free zones? 45:36 How to shape your kids’ eating habits for life 📚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 Free resources from ZOE Live Healthier: Top 10 Tips From ZOE Science & Nutrition Gut Guide - For a Healthier Microbiome in Weeks Mentioned in today's episode Trends in Adults’ Intake of Un-processed/Minimally Processed, and Ultra-processed foods at Home and Away from Home in the United States from 2003–2018, 2025, The Journal of Nutrition Ultra-processed food intake in toddlerhood and mid-childhood in the UK: cross sectional and longitudinal perspectives, 2024, European Journal of Nutrition The Healthfulness of the US Packaged Food and Beverage Supply: A Cross-Sectional Study, 2019, Nutrients Ultraprocessed Food Consumption and Cardiometabolic Risk Factors in Children, 2024, JAMA Network Open Maternal consumption of ultra-processed foods and subsequent risk of offspring overweight or obesity: results from three prospective cohort studies, 2022, British Medical Journal Have feedback or a topic you'd like us to cover? Let us know here. Episode transcripts are available here.
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    51 mins
All stars
Most relevant  
Once again, it is like Jonathan is reading my mind and asking all the questions I have! (except for the one on tomatoes...). Thank you for explaining the science and debunking the latest myth, which although one can see it's just aimed at selling a miracle cure in the form of one supplement, it's good to have the tiny doubts it raises squashed.

Great episode!

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Information given in an easy to understand way. Great advice for food hacks to manage blood glucose.

Informative podcast Zoe Nutrition

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Science before marketing, all the topics to date have been fascinating and informative. I’ve read books by Tim Spector and Will Bulsiewicz, all very readable science. Their interest in the microbiome points the way to the medicine of the future. I could listen to both all day.
I look forward to further podcasts.

21st Century scientific nutrition

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It is staggering how we as consumers are being misled and that food producers get away with adding so much rubbish to our food and so cynically add compounds that create addictions and health risks.
These podcasts, together with Tim Spector’s books are real eye openers.

Essential information

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Full of science based information. Keep them coming Zoe, they are absolutely brilliant 👏 👌 🙌

I hope the Government are taking note.

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Love listening and widening my knowledge. Helps me make better decisions every day and my family benefit too. Win win

Brilliant & thank you

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Fascinating and informative. Jonathan asks the questions I would ask, he’s on our wave length.

Love every episode

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Just listened to the programme about vitamins, and was amazed that the fact that BAME people deaths from covid were over represented and a link was made to lack of vitamin D. The advice given about vitamin D was clearly targeted at white people/those living in sunny climates. Those of us with melanin living in UK don't absorb enough vitamin D from sunshine. And if also a vegan then surely supplements should be taken? Also, there is an issue with absorption of vitamin D supplements. Even though I take supplements, my levels are still low. Why no research into why people of colour seem to not absorb vitamin D as a supplement?

Good information, annoying posh voices!

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The reports were skewed. The press coverage was incorrect. Millions of women have missed out on treatment. They included the data on much older females in the reports which affected the percentages.
HRT is safe. Go get some. Enjoy your life x

If you are a female you need to hear this

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An excellent overview of fermented food. Would like to know more about the effects of salt in fermented foods on the body, particularly for people that have heart disease. Are fermented foods with salt ok for those people? Always excellent information, clearly presented.

Excellent information

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