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

    As testosterone in your blood increases, it suppresses the production of gonadotropin-releasing hormone, which helps maintain normal levels of testosterone. If any of these organs — your …

  2. 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 …

  3. Testosterone | Hormones

    Testosterone is a hormone that is responsible for many of the physical characteristics specific to adult males. It plays a key role in reproduction and the maintenance of bone and muscle strength.

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

    Signals sent from the brain to the pituitary gland at the base of the brain control the production of testosterone in men. The pituitary gland then relays signals to the testes to produce testosterone. A …

  6. Testosterone: Functions, deficiencies, and supplements

    Jul 18, 2023 · Testosterone is the key male sex hormone. Its functions include regulating fertility, muscle mass, fat distribution, and red blood cell production.

  7. Testosterone: What You Need to Know | Ada Health

    Sep 6, 2024 · Understand the functions of testosterone in the body, the signs of low levels, and how to maintain a healthy balance. Check the facts with Ada.

  8. Testosterone: What is it? Role, Function & Levels Explained

    Testosterone stimulates the development of male characteristics. Testosterone that our body makes is an anabolic-androgenic steroid. This means muscle building (anabolic), and male sex characteristics …

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

    Mar 17, 2023 · Testosterone is most often associated with sex drive and plays a vital role in sperm production. It also affects bone and muscle mass, the way men store fat in the body, and even red …

  10. Testosterone: Functions, Imbalances, and Health Strategies

    Dec 1, 2025 · Testosterone exerts a powerful anabolic effect, promoting protein synthesis and facilitating the growth and repair of skeletal muscle tissue. This action is particularly noticeable in the …