Michael Holick, MD, PhD, an endocrinologist and leading Vitamin D researcher, dives deep into the vital role of Vitamin D in human health. He discusses its evolutionary significance and how sunlight exposure is essential for its production. The podcast tackles fascinating insights into the relationship between Vitamin D and skin cancer, emphasizing that balanced sun exposure may actually reduce cancer risks. Holick also critiques modern health guidelines, shedding light on the importance of proper supplementation and ancestral approaches to Vitamin D.