Ep. 11 - Ozempic, Yo-Yo Diets & the Science of Weight Loss, with Dr. David Allison

Obesity is one of the most misunderstood and emotionally charged topics in health. But what does the science actually say? Dr. David Allison is one of the world’s leading obesity researchers and biostatisticians. Today, he’s here to cut through the noise.

A professor of paediatrics and director of the USDA Children’s Nutrition Research Centre, David has spent decades challenging assumptions in the field. His rigorous, evidence-led approach is exactly what this conversation calls for.

He sits down with Charlie and Greg to unpack what obesity actually is, what drives it, and how to think about managing it in a way that’s realistic, compassionate, and grounded in evidence.

Starting with the science, David explains why BMI is more nuanced than its critics suggest, and why the conceptual definition of obesity - excess body fat that impairs health or longevity - is harder to work into practice than it sounds. He walks us through what we can say with confidence about obesity’s health risks, the role of energy balance and diet composition, and why body weight tends to creep back up after dieting (with some surprisingly reassuring findings along the way).

In the practice segment, David, Greg, and Charlie get into the practical side of weight management, including:

•        Why higher protein intake is one of the biggest levers for body composition

•        The case for resistance training – especially if you’re using GLP-1 medications

•        How to evaluate diet advice using a simple evidence checklist

•        Why the ‘dental model’ of weight management might change how you think about yo-yo dieting

•        What to know before starting semaglutide or other obesity medications

 

Finally, in the experience section, we turn to listener questions. We tackle navigating weight management during perimenopause and menopause, how to evaluate conflicting health claims online, and what to do about hair loss while using Mounjaro and GLP-1s.

Enjoy this conversation, and if you’d like to send us your health questions for future episodes, remember to email us a voice note or write in at themethod@thriva.co.

 

To explore further

•        David Allison – Website: https://www.linkedin.com/in/david-allison-2917963b/

•        USDA Children’s Nutrition Research Centre: https://www.bcm.edu/research/research-centers/usda-ars-childrens-nutrition-research-center

•        Greg Potter – Website: gregpotterphd.com

•        Greg Potter – Instagram: @gregpotterphd

•        Thriva – Website: thriva.co

 

About Thriva

Thriva is a proactive health platform built for the modern age. The promise of longevity often comes with years spent in poor health. We want to bridge the gap between lifespan - how long we’re living - and healthspan - how well we’re living. We combine powerful at-home blood testing with wearable insights and expert guidance. So you can know exactly what’s going on inside your body - and what to do about it - before issues arise. With this podcast, we hope to bring listeners confidence in everyday health decisions.

 

To learn more about Thriva’s values and services, visit https://thriva.co/.