Testosterone Side Effects - There’s a good reason guys go girl-crazy in their teens and twenties: Their testosterone levels are at their peak. From there though testosterone levels slowly decrease.

After age 30 most men begin to experience a gradual decline in testosterone. Although testosterone levels never reach zero (as estrogen levels do in women during menopause) low testosterone levels men to experience symptoms such as fatigue low sex drive and loss of muscle mass.

While low testosterone is more common in older men it can occur in younger men as well. Fortunately all of the causes of low testosterone in young men are treatable so if you experience such symptoms at any age there’s no reason to ignore it.

For younger men a drop in testosterone levels can be caused by some illnesses including type 2 diabetes chronic liver or kidney disease COPD or other lung disease or pituitary gland problems.

Genetic causes of low testosterone in men include the diseases Klinefelter syndrome Kallmann syndrome Prader-Willi syndrome and Myotonic dystrophy. Another disorder that can cause low testosterone is hemochromatosis which makes the body store too much iron.

Doctors categorize causes of low testosterone as primary or secondary.

Primary hypogonadism stems from a problem in the testicles. This could be from a developmental issue injury to the testicles or radiation or chemotherapy treatment. In secondary hypogonadism the testicles are normal but function improperly because of a problem with the hypothalamus or pituitary gland.

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