Testosterone is a sterol hormone secreted by male testis or female ovary, and a small amount of testosterone is also secreted by adrenal gland. The effects of testosterone can be divided into anabolic and masculine effects. Anabolic effects include the growth of muscle mass and strength, the increase of bone density and strength, the stimulation of linear growth and bone maturation.
The release of synthetic testosterone in the blood is very fast, causing the testosterone index to rise very fast, resulting in very large side effects. Therefore, in order to delay the release time and market of synthetic testosterone after entering the body, testosterone decanoate, testosterone enhate, testosterone propionate, testosterone cypionate and testosterone isocaproate appeared, Testosterone undecanoate these testosterone hormones that add other lipids to testosterone.