This week, Dr. Jesse Mills is joined by Dr. Jasper Bash — men’s health expert, researcher, and occasional a cappella tenor — for a candid look at how to build healthier sperm. They unpack the latest findings on marijuana, alcohol, and other environmental exposures, including what’s myth, what’s real, and what’s actually reversible. Dr. Bash also shares practical timelines, clinical tips, and the fitness and nutrition habits that keep him performing at his best.