The blueprint for your life starts much earlier than you realise - long before you took your first breath, before your heart beat its first beat, before your mum and dad even met.
This is the story of the first 1,000 days of life. From conception to age 2, a window so powerful that scientists now believe it influences our future risk of heart disease, obesity, diabetes, and even how our immune system reacts to the world.
In this episode, the world’s leading expert on how childhood nutrition and metabolism shape our long-term health, Professor Lucilla Poston, explains how early nutrition may influence appetite, metabolism, and future disease risk.
Lucilla and ZOE’s Head Nutritionist, Dr Federica Amati, break down what science says about pregnancy, early feeding and the food children eat, and questions how lifelong health is shaped before a child even chooses their first meal.
Lucilla offers practical guidance on what matters most and explains key nutrients to consider. They discuss why regular movement may help support healthy blood sugar levels. They also explain what a balanced diet can look like for parents and young children, why babies should try a wide range of whole foods, and why many packaged baby foods may contain far more sugar than parents expect.
What small choices can you make today to help shape a healthier future for you, your children, and your children’s children?
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Timecodes
00:00 Intro
03:47 Why the first 1,000 days can shape your entire life
08:12 What happens in the womb doesn’t stay in the womb
11:16 The tiny window where everything can go wrong
13:35 Why obesity in pregnancy is now a silent epidemic
15:17 Can a father’s health affect a baby before it even exists?
17:50 The missing nutrient most women don’t realise they need
20:35 The simplest way to improve your chances of conceiving
22:31 Should pregnant women worry about getting it wrong?
24:25 The biggest lies about pregnancy you’ve probably heard
26:47 Why pregnancy nutrition isn’t about being perfect
28:13 Why some children are at higher risk before they’re born
30:05 Can a mother’s diet rewire a baby’s brain for life?
31:47 The hormone that could make you crave junk food forever
35:11 When a normal pregnancy change becomes dangerous
39:04 Why pregnancy diabetes doesn’t end after birth
40:07 The one habit that lowers blood sugar during pregnancy
42:11 What pregnant women should actually be eating
45:37 The truth about ‘6 eggs a day’ and other diet myths
47:11 Why breast milk is more powerful than we ever realised
50:14 What babies should eat (and what to avoid)
52:13 The truth about baby food pouches parents aren’t told
55:20 The shocking reality of childhood obesity today
60:19 Is it too late to undo what happened before birth?
📚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
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
Paternal body mass index and offspring obesity, Annals of Nutrition and Metabolism (2023)
Lifestyle intervention in obese pregnancy, Nature (2022)
Exercise during pregnancy, BMJ (2026)
The long-term impact of obesity in pregnancy on offspring hypothalamic feeding pathways, Royal Society Open Science (2025)
Have feedback or a topic you'd like us to cover? Let us know here.
Episode transcripts are available here.
ZOE Science & Nutrition 
