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[ What is the role of testosterone ]?
Before you learn about hypogonadism, get an understanding of what testosterone does.
- The effects of testosterone go beyond sexual characteristics and function.
- Testosterone levels between 300 ng/dL and 1000 ng/dL are considered normal.
- Testosterone is made in the testes. The brain and testes work together to keep testosterone levels within the normal range.
Testosterone is a hormone made in a man's testes.
- Reproductive tissues
- Sperm production
- Hair growth and distribution
- Muscle mass and strength
- Bone density and strength
- Distribution of fat
Total Testosterone Levels (ng/dL)
The lower limit of the normal range may vary by lab or test used.
There is a numerical range of testosterone levels which is considered normal. Testosterone levels obtained through blood tests are typically measured in nanograms per deciliter (ng/dL). Levels between 300 ng/dL and 1000 ng/dL are generally considered in the normal range.
The brain and the testes work together to keep testosterone levels in this range. When levels are below the normal range, the hypothalamus and pituitary gland in the brain signal the testes to make more. When there is enough, they signal the testes to make less.