Testosterone is responsible for the development of the male sex organs and secondary sexual characteristics. It is a steroid hormone, structurally similar to cholesterol. Testosterone was first synthesized from cholesterol in 1935 to treat diseases of hormone deficiency.

Testosterone is often identified with masculinity.Testosterone is often identified with masculinity.

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Despite being a male sex hormone, females also produce testosteron in smaller quantities. While the testosterone level of a female body is around 1 nmol/l, men normally have thirty times more male sex hormones.

Testosterone is manufactured by chemical and microbiological modification of readily available naturally-occurring materials.

Testosterone molecule