Rowan Jacobson, a science journalist and author of "In Defense of Sunlight," dives into the often misunderstood benefits of sun exposure. He challenges the conventional wisdom around sunscreen use, arguing that its overreliance may lead to health issues in the West. Jacobson reveals how sunlight positively affects blood pressure, mood, and autoimmune diseases, emphasizing that these benefits extend beyond vitamin D production. He also discusses changing health recommendations in Australia and the importance of balancing sun exposure with skin cancer risks.