Nitric oxide is a vital molecule involved in nearly every aspect of human health, yet it often goes unrecognized in mainstream medicine. In this episode, Dr. Nathan Bryan—a leading researcher in the field with over two decades of work dedicated to nitric oxide science—explains how this molecule influences cardiovascular function, insulin sensitivity, mitochondrial health, cognitive performance, and longevity, and why its decline with age contributes to many chronic diseases. Dr. Bryan shares practical ways to support nitric oxide levels through specific foods and lifestyle habits, and explains how certain everyday routines can actually disrupt its production. He also offers a personal story of reversing chronic illness in his father by addressing nitric oxide deficiency.