It regulates the sexual drive (libido) and affects the sexual functions. The erection of the penis is significantly affected by the testosterone levels. It also influences bone mass (density), body fat distribution, muscle mass and strength, red blood cells, and sperm production.
Testosterone is a hormone that plays important roles in the body. Testicles in men and ovaries in women make testosterone, and small amounts of testosterone are produced in adrenal glands in both sexes. Testosterone is more than a hormone. It has impact on many organs in the body and the general body health.
Testosterone is also produced in the ovaries of women. It is considered that testosterone regulates sexual desire in women as well, and has significant impacts on bone density. The amount of testosterone in women are quite less than in men.