136: Why is Vitamin D So Important in Health and Longevity?
Episode description
Vitamin D is more than a vitamin—it's a hormone that influences everything from your immune system to cardiovascular health, cognition, and longevity. In this conversation, Dr. Michael Holick breaks down the science of vitamin D synthesis, the truth about sun exposure vs. supplements, and why vitamin D deficiency is far more common—and more dangerous—than most people realize.
You'll learn how skin pigmentation, UVB exposure, and supplementation protocols impact your vitamin D levels, and why D3 is more effective than D2. Dr. Holick also dives into mood, cognition, and the controversial role of vitamin D in chronic disease and COVID outcomes.
With dosage guidelines by age and weight, plus practical advice on avoiding vitamin D toxicity, this episode is a masterclass on one of the most important—yet misunderstood—nutrients in health and longevity.
Learn more about Dr. Michael F. Holick:
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