The normal testosterone levels in males varies depending upon the person’s natural hormone levels. Most physicians agree that the range of a normal level is 250 to 1,000 nanograms (ng) per deciliter (dL) of blood. For young males under the age of 30, the normal range is upwards of 600 ng/dL. Normal testosterone levels in males naturally decreases as men age. Men in their 50s usually test in the mid-500 ng/dL. Each man’s production of the hormone is different, so ranges will vary depending upon the individual.
Testosterone is an androgen-type steroid hormone produced by males in the testes and by woman in the ovaries, and it is created from cholesterol. The pituitary gland is responsible for signaling the testes to begin or stop the production of testosterone. Natural testosterone levels in males are higher than in woman, and the hormone is responsible for the development of sex organs in men. The hormone is also involved in the development of male characteristics, such as the growth of hair, the adam’s apple, and low body fat mass. Testosterone is used by the body for the growth of organs and muscles, and it stimulates sexual functions and the production of sperm.
Levels of testosterone are highest in the early morning or after physical activity. Some people think that the higher the levels of testosterone, the better the man will feel and look. Many body builders and men wishing to increase their testosterone levels take supplements containing testosterone because the hormone is used naturally by the body when creating muscle mass. This can be unsafe if not directed by a physician, and some forms are considered anabolic steroids and have negative side effects. Studies have shown that high testosterone levels can cause a man to become angry, decrease the size of the testicles, and increase the amount of acne on the skin.
Too low of a level of testosterone on a consistent basis can be the result of a condition known as hypogonadism, in which the gonads produce hormones in such low amounts that other bodily functions are affected. Many men experience depression, erectile dysfunction, low bone mass, infertility, and hot flashes. This condition can also occur during fetal development and in young boys, which may lead to other physiological issues from the lack of development of primarily male characteristics and fully developed sexual organs. A simple blood test can confirm if the person’s testosterone levels are low, and then a physician may order additional tests to confirm the diagnosis. Testosterone replacement therapy is main type of treatment option for hypogonadism, which will help to restore normal testosterone levels in males.