The testosterone hormone, which is identified as a male hormone, affects libido, muscle mass formation and energy level resistance, and changes in secondary sex characteristics in men at puberty, for example, the sound changes to become heavier. Normal levels of the male hormone testosterone range from 250-1100 ng / dL (nanograms per deciliter) to an average level of 680 ng / dL. There are also studies that show that optimal levels of the hormone testosterone for men range from 400-600 ng / dL. This hormone increases during puberty and reaches a peak when men are around 20 years old. After 30 years and over, these hormone levels will decrease by about one percent each year. So when men reach the age of 65 years, their normal testosterone levels range between 300-450 ng / dL. The hormone testosterone is not only owned by men, but also by women. In women, this hormone is produced in the ovaries in small amounts. Together with the female sex hormone, estrogen, testosterone plays a ro...