Unexplainable Unexplainable

An argument for the sun

Jul 27, 2026 · 30m

Summary

Host Sally Helm interviews Rowan Jacobson, author of *In Defense of Sunlight*, to explore the complex relationship between humans and solar energy. They discuss the history of heliotherapy, the shift toward sun avoidance due to skin cancer fears, and emerging science on sunlight’s benefits for heart health and mortality. The conversation challenges conventional wisdom, suggesting that moderate sun exposure offers profound physiological and cosmic connections beyond just Vitamin D.

Topics discussed

Sponsors: Mount Sinai and JustWorks Introduction: The sun's effect on mood and health Guest Rowan Jacobson joins to discuss his book History of heliotherapy and the sanitarium era The shift to sun avoidance and skin cancer warnings Swedish study: Sunlight reduces blood clots and mortality Discovery of nitric oxide release from skin by sunlight Cardiovascular benefits vs. skin cancer risks Why vitamin D supplements fail to replicate sun benefits The complexity of sunlight's biological effects Sponsors: Robling Sport, Verizon, JustWorks, Indeed Red light therapy and mitochondrial energy production Current medical advice and the 'light diet' Philosophical view: Humans animated by light Outro, credits, and final sponsor messages
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