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  1. Testosterone - Wikipedia

    In humans, testosterone plays a key role in the development of male reproductive tissues such as testicles and prostate, as well as promoting secondary sexual characteristics such as increased …

  2. Testosterone: What It Is, Function & Levels - Cleveland Clinic

    Sep 1, 2022 · What is testosterone? Testosterone is a hormone that your gonads (sex organs) mainly produce. More specifically, both testicles and ovaries produce testosterone.

  3. Testosterone: What It Is and How It Affects Your Health

    Mar 17, 2023 · Testosterone is most commonly associated with sex drive in men. It also affects mental health, bone and muscle mass, fat storage, and red blood cell production.

  4. Testosterone | Definition, Effects, & Facts | Britannica

    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 deepening of the voice.

  5. Testosterone therapy: Potential benefits and risks as you age

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

  6. The brain and pituitary gland, a small gland at the base of the brain, control production of testosterone by the testes. From there, testosterone moves through your blood to do its work.

  7. Testosterone — What It Does And Doesn't Do - Harvard Health

    Want to know how much testosterone is okay for you? The answer may surprise you. Learn all about the male sex hormone here, including its primary benefits.