Just as estrogen and progesterone are the female sex hormones, testosterone is the male sex hormone (although women have testosterone levels one-tenth to one-twelfth those of men). Testosterone is the main hormone produced in the testicles and secreted by the testes.

Testosterone Benefits (Result may vary by individual)

The major effects of testosterone is that stimulates the growth of certain organs, promotes protein anabolism, that is, the use of protein to build muscle, skin, and bone, and militates against protein catabolism, or breakdown. Testosterone regulates the production of prostaglandin, which seems to keep prostate growth under control.

The effects of testosterone are most pronounced during puberty. It brings on the enlarged larynx, thicker vocal cords, new body hair, increased muscle mass, and increased oil-gland secretion by the skin commonly associated with puberty. After puberty, levels of testosterone drop gradually in men, with profound effects on physical health and well-being and particularly on mood and libido.