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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 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.

  3. 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.

  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. 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.

  7. 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.

  8. 10 truths about testosterone: What men need to know

    Jun 23, 2025 · Beyond sexual function and fertility, testosterone is the hormone that drives your masculine traits— facial hair, deeper voice, muscle growth. It also contributes to a man’s brain …

  9. Impact of Testosterone on Male Health: A Systematic Review

    Testosterone, a steroid hormone predominantly synthesized in the testes, is integral to a wide range of physiological processes that are crucial to male health; the regulation of testosterone levels operates …

  10. Surprising Signs Your Testosterone Levels Aren’t Normal

    Nov 22, 2025 · Normal testosterone levels in men are 300–1,000 ng/dL; in women, they are 15–70 ng/dL. Normal testosterone levels are important for both men and women, since this hormone affects …

  11. 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. When levels of testosterone drop below levels...

  12. High and Low Testosterone Levels in Men - MedicineNet

    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. Higher than …

  13. Testosterone: Everything You Need to Know - Everyday Health

    Mar 18, 2024 · Testosterone is the primary sex hormone in men, and it is responsible for the development of many physical characteristics that are considered typically male. Women also …

  14. What Is Testosterone? The Science Behind Its Impact on Your Body

    May 29, 2025 · Testosterone plays a central role in shaping both your physical characteristics and reproductive functions, like your testicular and penis growth, sperm production, muscle mass, and …

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

    Sep 6, 2024 · While testosterone is an androgen, or male sex hormone, both men and women have, and need, testosterone. Testosterone is produced by the testicles, the ovaries, and the adrenal cortex, …

  16. FDA issues class-wide labeling changes for testosterone products

    Feb 28, 2025 · Testosterone, a hormone essential to the development of male growth and masculine characteristics, is approved solely for use in men who lack or have low testosterone levels in …

  17. 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.

  18. 8 Proven Ways to Increase Testosterone Levels Naturally

    Apr 28, 2025 · Testosterone is important for muscle mass, fat loss, and health. Learn how to naturally increase your T levels with weightlifting and more.

  19. What It’s Like When Your Wife Goes on Testosterone

    Dec 26, 2025 · She went on testosterone to help with her menopausal symptoms. The effects had unexpected consequences for their marriage.

  20. Testosterone: Roles, Regulation, and Health Impacts

    Testosterone is a crucial hormone that plays significant roles in the human body, influencing various physiological processes in both men and women. It is primarily known as the male sex hormone, but …

  21. Exercise and Testosterone: Types of Workouts, Benefits

    Sep 25, 2025 · Certain workouts have been shown to increase testosterone, while other types have little effect on T. Doctors explain more about the connection.

  22. Low Testosterone (Low T): Causes, Symptoms & Treatment

    Sep 2, 2022 · Low testosterone (male hypogonadism) is a condition in which your testicles don’t produce enough testosterone. It has several possible causes, including conditions or injuries affecting your …

  23. Testosterone: What It Is, What It Does, and What You Need To Kow

    Jan 21, 2025 · Testosterone is a natural hormone produced by both men and women and is involved in regulating a number of functions within the human body. In men, testosterone is primarily produced …

  24. What Is Testosterone? Testosterone Functions, Deficiencies, & More

    Nov 22, 2023 · Testosterone is a hormone that is most closely tied to your sex drive, your fertility, your body’s ability to store and burn fat, red blood cell production, and even your emotions and mood.

  25. Testosterone: What is it, how it works & healthy levels

    Apr 16, 2024 · Testosterone is the main androgen (sex hormone) in men and normal levels are needed for physical and mental health.

  26. 5 Ways Testosterone Boosters May Affect Your Body

    Dec 26, 2025 · Testosterone boosters promise to improve energy, mood, and sexual health. The reality is that far from being cure-alls, some of them may lower your body's testosterone levels and pose …