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Each day this week, we’re examining one of the world’s most popular diets. Putting the latest scientific evidence under the microscope, we’ll find out these diets' true impact on your health.

Today, we’re talking about the century-old paradigm of weight management — calorie counting. Rooted in the law of thermodynamics, the notion is simple: Consuming fewer calories than expended results in weight loss.

While seemingly straightforward, the practical application of calorie counting can prove challenging, with many of us underestimating our calorie intake or finding it difficult to maintain this diet long-term.

In this special episode of ZOE Science & Nutrition, Jonathan is joined by Christopher Gardner, Professor of Medicine at Stanford University and the Director of Nutrition Studies at Stanford Prevention Research Center. Together, they explore this diet's complexities, addressing its potential and pitfalls. 

If you want to uncover the right foods for your body, head to https://zoe.com/podcast and get 10% off your personalised nutrition program.

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Timecodes:

00:00 Introduction

00:42 Pre warning

00:52 Topic Intro

01:20 Why is calorie counting so popular?

02:40 Does it matter what you eat or only about total calorie intake?

04:14 What happens in your body when you eat fewer calories?

07:08 What does the science say now?

08:35 How does your metabolism change when you cut calories?

10:29 Why is the diet still so officially accredited?

11:23 What's the verdict?

12:30 Outro

Mentioned in today’s episode: 

• Energy compensation and metabolic adaptation: "The Biggest Loser" study reinterpreted, from Obesity                                       

Is there a nutrition topic you’d like us to cover? Email us at podcast@joinzoe.com, and we’ll do our best to cover it.

Episode transcripts are available here.

Brian Johnson, who will later become known as Liver King, grows up a scrawny kid who often gets picked on. He decides to start bulking up so that he won’t get picked on anymore. As an adult, he takes his fitness journey a step further and forces his family to go on an extreme diet: eating mostly raw meat. He thinks this caveman-style meal plan is marketable and turns to selling supplements so that others can follow in his footsteps. But after he starts posting viral videos as Liver King and building a massive following, incriminating emails surface that completely undermine his carefully crafted persona.

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0:56 Sam's introduction and incredible weight loss
4:13 Sam's nutrition growing up
8:47 Sam's weight as a child
10:35 How his weight ballooned in college
15:46 What finally made him change
22:06 When his weight loss first stalled
25:25 Sam felt unhealthy when we lost too much
30:18 How Sam found RP on Youtube
35:21 Ethan Suplee's similar weight loss journey
39:10 Sam started training with RP home workouts
42:50 Sam's learned everything he knows for free on Youtube
46:52 Biggest thing he's learned from RP
50:30 Sam's favorite YT video
51:18 Sam's new goals