The “Calories In, Calories Out” Myth: Dr. Robert Lustig episode artwork

EPISODE · Sep 2, 2025 · 58 MIN

The “Calories In, Calories Out” Myth: Dr. Robert Lustig

from Vitality Made Simple · host Debbie Ozment, DDS, MS

Think all calories are equal? Think again. In this episode of Vitality Made Simple, Dr. Robert Lustig joins us to explain how the “calories in, calories out” weight loss model fails to account for the complexities of our biology. He explains why equal calorie counts can have unequal effects: fiber reduces absorption, protein costs energy to process, fats are not metabolically equivalent, and fructose impairs mitochondria and drives insulin resistance. Dr. Lustig delves into why intact fiber is much better at slowing sugar absorption, while pulverized fiber, like juice and smoothies, can instead spike insulin. He also weighs on GLP-1 agonists, which can be helpful but have significant drawbacks like digestive issues, muscle loss, and weight regain. He stresses that true health comes from eating whole foods, exercising, and finding joy beyond sugary treats.Disclaimer: This podcast is for general information and entertainment purposes only and does not constitute medical or dental advice. Any mention of products, services, tests, or supplements is not an endorsement and may include affiliate links. Guest views are their own and may not reflect the views of Dr. Debbie Ozment or this podcast. Always consult a qualified healthcare professional for advice specific to your situation.Visit my website DrDebbieOzment.com for valuable free downloads.  Additionally,  you will find shopping links which I have curated on the website.  Please follow me on instagram at drdebbieozment.

Episode metadata supplied by the publisher feed · Published Sep 2, 2025

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Think all calories are equal? Think again. In this episode of Vitality Made Simple, Dr. Robert Lustig joins us to explain how the “calories in, calories out” weight loss model fails to account for the complexities of our biology. He explains why equal calorie counts can have unequal effects: fiber reduces absorption, protein costs energy to process, fats are not metabolically equivalent, and fructose impairs mitochondria and drives insulin resistance. Dr. Lustig delves into why intact f...

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The “Calories In, Calories Out” Myth: Dr. Robert Lustig

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