"Über krystallinisches mannliches Hormon aus Hoden (Testosteron) wirksamer als aus harn oder aus Cholesterin bereitetes Androsteron" [On crystalline male hormone from testicles …

Testosterone is a hormone that your gonads (testicles or ovaries) mainly produce. Testosterone levels are naturally much higher in males.

Mar 17, 2023 · The hormone, which is found in both men and women, is most often associated with sex drive, but it also affects bone and muscle mass.

Dec 19, 2025 · Testosterone, hormone produced by the male testis that is responsible for development of the male sex organs and masculine characteristics, including facial hair and …

Oct 30, 2025 · High or low testosterone levels in men can cause symptoms and signs of weight gain, osteoporosis, decline in sexual desire, and a decline in physical energy and stamina. …

Jul 18, 2023 · Testosterone is a sex hormone that regulates sexual development, muscle mass, and red blood cell production. It originates mainly in the testicles and influences sex drive, fat …

Apr 3, 2024 · Testosterone production in men peaks in your teen years and remains high until your mid-thirties when T levels naturally start to decline.

Oct 18, 2025 · Testosterone replacement therapy can help men with low testosterone levels and symptoms of hypogonadism. Men interested in future fertility should avoid testosterone …

Jan 19, 2024 · Testosterone therapy — Explore the potential benefits and risks of increasing your testosterone level.

Jan 2, 2023 · Testosterone is the primary male hormone regulating sex differentiation, producing male sex characteristics, spermatogenesis, and fertility. Testosterone’s effects are first seen in …