Male fertility is in a global tailspin, but the crisis goes far beyond the ability to conceive. Stanford’s Dr. Michael Eisenberg reveals why your sperm count is a "sixth vital sign" that can predict your risk of chronic disease and even your lifespan decades in advance Why is male fertility collapsing globally, and what does it mean for the future of our species? In this episode, Dr. Mark Hyman sits down with Dr. Michael Eisenberg, Director of Men’s Health at Stanford University, to discuss infertility in men, the alarming decline in semen quality and testosterone levels. They dive into the "sixth vital sign"—the revolutionary idea that sperm count and quality are direct reflections of a man’s overall metabolic and cardiovascular health. Dr. Eisenberg explains the "toxic soup" of endocrine-disrupting chemicals, microplastics, and lifestyle factors like obesity and sedentary behavior that are driving this reproductive health epidemic. You’ll learn actionable strategies to optimize hormonal health, including the impact of saunas, laptop heat, and specific antioxidant supplements like CoQ10 and spermidine. Whether you are looking to conceive or simply want to live a longer, healthier life, this deep dive into men’s sexual health provides the roadmap you need We cover: • Why sperm quality may be one of the strongest early indicators of overall health and longevity • How metabolic dysfunction, belly fat, and low testosterone impact fertility and sexual function • The role environmental toxins and endocrine disruptors play in declining sperm counts • What men can do right now to protect fertility and long-term vitality When we look at fertility through the lens of whole-body health, it changes how we think about prevention, risk, and longevity. Male fertility isn’t just about reproduction. It’s a signal. Register for The Ultra Learning Series: Functional Fertility on Thursday, February 12 at 12PM ET ⁠here - https://us06web.zoom.us/webinar/register/WN_D-Tzh9z8QmyQdZpBOgohKQ#/registration⁠. ⁠View Show Notes From This Episode⁠ https://drhyman.com/blogs/content/podcast-ep1111 ⁠Get Free Weekly Health Tips from Dr. Hyman⁠ ⁠https://drhyman.com/pages/picks?utm_campaign=shownotes&utm_medium=banner&utm_source=podcast⁠ ⁠Sign Up for Dr. Hyman’s Weekly Longevity Journal⁠ ⁠https://drhyman.com/pages/longevity?utm_campaign=shownotes&utm_medium=banner&utm_source=podcast⁠ ⁠Join the 10-Day Detox to Reset Your Health⁠ ⁠https://drhyman.com/pages/10-day-detox⁠ ⁠Join the Hyman Hive for Expert Support and Real Results⁠ ⁠https://drhyman.com/pages/hyman-hive⁠ This episode is brought to you by Qualia, Seed, PerfectAmino, Sunlighten, BIOptimizers and Korrus. Go to ⁠qualialife.com/hyman⁠ and use code HYMAN at checkout for an extra 15% off. Go to ⁠seed.com/hyman⁠ and use code 20HYMAN to get 20% off your first month. Go to ⁠bodyhealth.com⁠ and use code HYMAN20 to get 20% off your first order. Visit ⁠sunlighten.com⁠ and use code HYMAN to save up to $1400. Head to ⁠bioptimizers.com/hyman⁠ and use promo code HYMAN at checkout to save 15%.Upgrade your lighting. Enjoy 15% off at ⁠korrus.com/drhyman⁠. #MensHealth #FertilityCrisis #Testosterone