By: Kelly Callis APRN, Founder of Concierge Medical Clinic INTRO: Testosterone is one of the most talked about hormones in men's health — yet one of the least understood. Most men know it affects muscle and sex drive, but its role goes much deeper than that. Today let's talk about what testosterone actually does, why it declines and what you can do about it. — Kelly Callis APRN, Founder of Concierge Medical Clinic WHAT DOES TESTOSTERONE ACTUALLY DO? Testosterone is the primar