Full Show Notes: bengreenfieldlife.com/drandrew2

In this episode, Dr. Andrew Koutnik returns for part 2 of our deep dive into metabolism and nutrition. We explore why you need far fewer carbohydrates than you think—both during daily life and intense exercise—and how sustained blood glucose levels for brain energy metabolism matter more than muscle glycogen stores. Andrew breaks down the different types of exogenous ketones, debunks liver toxicity concerns, and shares groundbreaking research on ketones for sleep quality and sleep apnea treatment from his NASA astronaut studies.

Dr. Andrew Koutnik is a research scientist whose career bridges cutting-edge science, elite performance, and personal experience living with type 1 diabetes for over 17 years. His work focuses on how nutrition, metabolism, and lifestyle can be leveraged to maximize human health, performance, and resilience across diverse conditions—from chronic disease to extreme environments.

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Why You Need FAR Less Carbs Than You Think (Especially During Exercise) & Ketones As An "Alternate Fuel", With Dr. Andrew Koutnik - Part 2