Methyltestosterone can promote the male sex organs and used in seedling stage sex change. Methyltestosterone is a steroid hormone from the androgen and is found in mammals and other vertebrates, Methyltestosterone is primarily secreted in the tests of mails and the ovaries of female, although small amount are also secreted by the adrenal glands, Methyltestosterone is the principle male sex hormone and an anabolic steroid.

Methyltestosterone plays a key role in the development of male reproductive tissue such as the testis and prostates. In addition, Methyltestosterone is essential for health and well-being as well as the prevention of osteoporosis, Methyltestosterone is conserved through most vertebrates, although fish make a slightly difference from called 11-ketotestosterone.