Testosterone is a sex hormone also called androgen, androgen is also found in the female body. In men, testosterone is mainly secreted by the testes and adrenal glands, while in women it is mainly secreted by the ovaries and adrenal glands. The level of testosterone in adult men is about 20 times higher than that in women. Testosterone plays a big role in the physiological functions of the body, such as the maintenance of male secondary sexual characteristics, if the development of vulva, penis development, pubic hair development, the development of the throat knot, including the male is active, good fight, are to go to the body of androgens in action. If a woman has elevated testosterone levels, she will develop signs of generalized hirsutism and polycystic ovaries. However, if the level of testosterone is too low, there are several situations, as follows: 1, children with low testosterone levels, will be manifested as developmental delays; 2, older people with low testosterone levels, there is the occurrence of menopause in older men, their whole body muscle atrophy, fat increase, low bone density, like sweating will occur, so testosterone is very important to men, as the saying goes, testosterone shaped the male.