The facts about testosterone and sex

Can boosting testosterone levels improve your sex life?

The hormone testosterone plays a big part in men's health, but perhaps its most meaningful role is to fuel sex drive and performance.

Testosterone levels tend to decrease with age. They peak by early adulthood and then can drop by up to 1% per year beginning around age 40. Sometimes an abrupt fall occurs because of an injury or illness (such as an infection), chemotherapy or radiation treatment, or certain medications.