What is testosterone?
Testosterone is the primary sex hormone produced in men’s bodies. Testosterone stimulates the development of the penis and testes, growth of facial and pubic hair, deepening of the voice, changes in body-shape, growth of bones, and increased muscle mass and strength. It helps maintain sex drive and the production of sperm cells, and it may play a role in balding. Mood is also affected by testosterone, and low levels of the hormone can cause severe and prolonged depression as well as fatigue. Testosterone is produced mostly in the testes and a small amount is produced from steroids secreted from the outer part of the adrenal glands called the adrenal cortex. Women’s ovaries also produce a small amount of testosterone.
In the male body, testosterone is the most important sex hormone. Testosterone is responsible for development of male characteristics such as body and facial hair, muscle growth and strength, and a deep voice. Normal levels of testosterone also influence the production of sperm, promote sexual function and promote sex drive. We now know that some men’s bodies do not make enough testosterone. These men may experience uncomfortable and sometimes distressing symptoms. The U.S. Food and Drug Administration (FDA) estimates that 4 to 5 million American men may suffer from low testosterone, but only 5 percent are currently treated. SYMPTOMS OF LOW TESTOSTERONE As men get older, the ability to produce testosterone declines. This decrease in testosterone production is sometimes referred to as andropause or male menopause. If testosterone levels fall below the normal range some typical symptoms may include: Low sex drive Erectile dysfunction (ED) Increased irritability or depression Fatigue Redu
