Did Sugar Cause The Obesity Epidemic?
Did Sugar Cause The Obesity Epidemic?  
Podcast: The Dr. Layne Norton Podcast
Published On: Mon Oct 06 2025
Description: Is sugar really to blame for the obesity epidemic? In this episode, I break down one of the most common nutrition myths. Using evidence from epidemiology, randomized controlled trials, and meta-analyses, Layne explains why sugar and high fructose corn syrup aren’t the independent culprits they’re often made out to be. Instead, he reveals what the research actually says about calories, metabolism, and how oversimplified narratives mislead the public. If you’ve ever been told “sugar is poison,” this episode will challenge your perspective with science, not fear.SPONSORS• REPS Research Review: https://biolayne.com/reps• Carbon Diet Coach – Achieve your goals with Carbon’s adaptive macro coaching app: https://joincarbon.com/podcastLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:02:49 - Research Funding and Bias0:14:52 - Previous Beliefs on Sugar0:15:31 - Types of Sugar0:17:42 - Previous Beliefs on HFCS0:19:37 - Leptin0:23:56 - Gary Taubes0:24:33 - REPS0:25:22 - Carbohydrate Insulin Model of Obesity0:27:42 - The Case for Sugar Causing Obesity0:30:08 - The Moment I Started to Change My Mind0:32:29 - Ice Cream0:34:18 - Researching Sugar0:39:15 - Mechanisms vs Outcomes0:41:10 - Classic Study0:42:28 - Mark Haub Twinkie Diet0:45:46 - Carbon Diet Coach0:46:46 - Metabolic Health0:48:03 - Glycemic Index0:49:51 - Sugar Intake vs Calorie Intake0:52:30 - Sugar Addiction0:54:21 - Let's Be Clear0:56:36 - Data Over FeelingsSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/did-sugar-cause-the-obesity-epidemic-episode-12