In this foundational episode, Dr. Scott Watier and Tommy Welling explore why fasting insulin may be the most critical yet overlooked health metric for preventing chronic disease and achieving lasting weight loss. They break down insulin's essential roles throughout the body—from brain health and bone growth to muscle building and hormone production—while explaining how insulin resistance silently develops years before diabetes diagnosis. The hosts reveal why standard medical testing focuses on downstream markers like fasting glucose and A1C instead of measuring insulin directly, and they provide practical guidance on how to order your own fasting insulin test for as little as $20. They discuss optimal insulin ranges based on leading researchers, explain the HOMA-IR calculation for assessing insulin resistance, and deliver actionable strategies including time-restricted eating, protein prioritization, zone two exercise, and stress management. This episode empowers you to become your own health advocate by understanding and optimizing this upstream marker that connects to eight of the top ten causes of mortality.

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