Testosterone

Testosterone is the most important sex hormone in men.  The brain controls testosterone production, which occurs mainly in the testicles (small amounts are also produced by the adrenal glands).  A part of the brain called the hypothalamus releases a hormone which signals another gland, the pituitary, to produce two other hormones (FSH and LH).  These hormones stimulate testosterone production in the testicles which is then released into the blood and travels throughout the body.

Testosterone is responsible for the development of typical male features including facial, body and pubic hair, muscle growth, and a deep voice.  It creates sex drive and sexual function, and influences sperm production and fertility.

Testosterone also helps to keep the heart, muscles and bones healthy.

Testosterone affects men differently throughout their lifecycle. As men age, testosterone levels may gradually start to fall off.  This decrease may be mild and a normal part of aging.  After the age of 40, testosterone levels start to fall at a rate of approximately 1–2% per year.  Testosterone levels vary greatly among older men, with some men maintaining robust levels well into their seventies or beyond.

Some testosterone related issues:

• Puberty
• Delayed Puberty
• Illegal steroid use
• Hypogonadism (low t)
• Bone density