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Testosterone is the primary androgen — or male hormone — in your body. Low testosterone affects up to 39 percent of adult men in the US over the age of 45, and becomes increasingly prevalent ...
Total testosterone levels tend to decline about 1.6 percent a year, ... Low testosterone can cause fatigue and even depression, which likely decreases someone's urge to work out or generally stay ...
Normal total testosterone levels depend on the man's age but generally range from 240 to 950 ng/dL (nanograms per deciliter) or 8.3–32.9 nmol/L (nanomoles per liter). [11] According to American Urological Association, the diagnosis of low testosterone can be supported when the total testosterone level is below 300 ng/dl. [12]
As men get older, declining testosterone levels are as inevitable as death and taxes. Around the age of 30, men's T levels start to dwindle by about 1 percent a year.
Testosterone levels in males and females ; Total testosterone Stage Age range Male Female Values SI units Values SI units ; Infant: Premature (26–28 weeks) 59–125 ng/dL: 2.047–4.337 nmol/L
[13] [54] This is known as hormone replacement therapy (HRT) or testosterone replacement therapy (TRT), which maintains serum testosterone levels in the normal range. Decline of testosterone production with age has led to interest in androgen replacement therapy. [55] It is unclear if the use of testosterone for low levels due to aging is ...
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