Watch “The Gut Health Challenge” on YouTube | LINKCan you boost energy, improve focus and lift your mood in just a few days, just by changing what you eat? In this episode, Professor Tim Spector and ZOE’s Head Nutritionist, Dr Federica Amati, break down the simple nutrition changes that help beat fatigue and shift how you feel. They speak to Lucy and Sarah, who put ZOE to the test and changed only their nutrition for six weeks. At the start, they were held back by brain fog, poor sleep, and constant tiredness. Could a six-week nutritional reset really move the needle? This episode shows what happened in real life as they explore why many people feel tired or flat, even when tests look “normal”. The episode explains why your gut microbiome matters, how you can feel better within days, and why consistency beats perfection.You will also hear the simple changes they made. Bigger breakfasts. More plant diversity. Easy food swaps. Small habits that fit into real life.If you feel tired but your tests say you’re “fine”, what would you change first? And if you felt better in days, would you keep going for six weeks?Join Prof Tim Spector behind the scenes, just search “ZOE Gut Health Challenge” on YouTube | LINKTimecodes📚Books by our ZOE ScientistsThe Food For Life CookbookEvery Body Should Know This by Dr Federica AmatiFood For Life by Prof. Tim SpectorFerment by Prof. Tim SpectorGood Mood Food (preorder) by Prof. Tim SpectorFree resources from ZOEThe Hormone Harmony Guide: Tuning Your Body’s Internal OrchestraEating for Better Brain Health: Your brain-gut blueprintHow to eat in 2026 - Discover ZOE’s 8 nutrition principles for long-term healthLive Healthier: Top 10 Tips From ZOE Science & NutritionGut Guide - For a Healthier Microbiome in Weeks Better Breakfast GuideMentioned in today's episodeThe Gut Health Challenge Have feedback or a topic you'd like us to cover? Let us know here.Episode transcripts are available here.The ZOE app and Gut Health test are for general health and wellness purposes only. They are not intended to prevent, diagnose or treat any medical condition.Sarah and Lucy received free access to the ZOE app and testing and Daily30 for their participation in the documentary.