identical twins

Ultra-processed foods have become ubiquitous in modern diets. Many of us eat them regularly without understanding their potential impacts on our health. 

From hidden additives to addictive properties, these highly processed foods can pose risks. 

Navigating the complex world of ultra-processing can be challenging, and many people struggle to understand what to avoid, how to break unhealthy habits, and make positive changes to their health.

In today’s episode, Jonathan is joined by a special guest, Dr. Chris van Tulleken, to explore the science behind ultra-processed food.

• Dr. Chris van Tulleken is an infectious diseases doctor at University College Hospital, in London, and one of the BBC’s leading science presenters. 

Chris shares the groundbreaking research from his own lived experiments, including the now famous study with his twin brother Xand. His book Ultra-Processed People is out now.

Jonathan and Chris are joined by ZOE regular Tim Spector. Drawing from their combined expertise, our guests provide practical tips and advice, empowering listeners to make informed choices and take control of their diets.

Download our FREE guide — Top 10 Tips to Live Healthier: https://zoe.com/freeguide

Timecodes:

00:31 Introduction

02:14 Quick Fire Questions

05:25 Start of Chris's journey in nutrition

06:47 Discordant twins - How can twin studies help us?

08:51 What part do genetics play in our differences in health?

12:52 What were the potential consequences of weight gain?

15:20 What is ultra processed food (UPF)?

16:54 What's the difference between processed and ultra processed food?

18:52 Is ultra processing purely about profit?

21:13 Examples of ultra processed foods (UPF)

23:13 ZOE UPF survey - How much does the ZOE community eat?

25:28 Are the products that say they're healthy lying to us?

26:12 Are certain ingredients hidden by UPF?

27:44 Is low fat yoghurt that good for us?

30:39 Is UPF just junk food?

32:56 Kevin Hall’s UPF study

34:19 What makes UPF addictive?

36:34 Chris' ultra processed food experiment

39:12 Could food manufacturers make healthier UPF?

41:23 How do we solve the issue of UPF as a society?

45:26 Practical advice for cutting down on UPF

51:37 Summary

55:15 Goodbyes

55:27 Outro

Follow Chris on Twitter: https://twitter.com/DoctorChrisVT

Follow ZOE on Instagram: https://www.instagram.com/zoe/

Episode transcripts are available here.

Is there a nutrition topic you’d like us to cover? Get in touch and we’ll do our best to cover it. 

Most of us would like something about ourselves or our lives to be different, but how easy is it to actually change?

Drs Chris and Xand van Tulleken are looking at whether people can change and how they do it. Exactly how much of any aspect of personality is genetic destiny and how much are we shaped by the world around us?

Chris wants to be a better doctor, friend, husband and father. But most urgently he wants to be a better brother, and is determined to improve his relationship with Xand. They’re best friends and talk to each other every day, but they are also business partners who find it very hard to work together without having a visceral row.

Chris wants to change how he relates to his brother and believes it is possible, but Xand is less convinced that we can or that he needs to change. In this series, Chris confronts that pessimism

In episode 1 - The Twin Effect - Dr Clare Llewellyn explains why we should all care about twin studies and the importance of understanding the impact of genetics vs environment on our development. Chris and Xand meet identical twins Mia and Alexandra who were separated at birth. They reflect on their twin dynamic through the years - what has it meant for their development and can they change the dynamic they have now? Presented by Drs Chris and Xand van Tulleken Produced by Hester Cant and Alexandra Quinn Series Editor Jo Rowntree A Loftus Media and van Tulleken Brothers Ltd production for BBC Radio 4

In December 1988, two sets of identical twins became test subjects in a study for which they had never volunteered. It was an experiment that could never be performed in a lab, and had never before been documented. This week, we revisit this fascinating story, told by psychologist Nancy Segal, about the eternal tug between nature and nurture in shaping who we are.

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Twin siblings are common enough that most people know a pair or two, but why does twinning occur? Josh and Chuckers explain where twins (and babies) come from, discuss different types of twins and debunk some "twin myths" in this episode.

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