A definitive number result can be provided for both free and total / no reporting cap. Total Testosterone measures the amount of testosterone in your blood. This measurement represents the amount of T your body is producing. Free Testosterone measures the amount of testosterone that can be used by the body. Testosterone is a hormone produced in the body which helps to; maintain reproductive tissues; stimulate sperm production; stimulate and maintain sexual function; increase muscle mass and strength; maintain bone strength; decrease risk of disease and death.