Numerous factors influence hair growth and loss, all of which can be avoided to varying degrees. The levels of certain hormones in the body are one factor that influences hair growth as you age. This short article explains some common hormone-related causes of hair loss.
The human scalp has approximately 100,000 hair follicles on average. When you are healthy, most of your hair follicles are in the anagen phase, when hair grows from the follicles. The remaining follicles are in the telogen phase or resting phase, during which hair is shed from the follicle.
Certain hormone levels that are low or changing can cause hair loss, thinning, and receding hairlines by causing more hair follicles to enter the resting phase.
Compared to other hormones, testosterone and other androgen hormones, such as DHEA, play the most important role in men's hair growth and loss. Excessive testosterone levels in the body can cause excessive hair growth, more so on the face and body than on the scalp. However, when your androgen hormone levels fall, the inverse can occur, resulting in hair loss and thinning all over your body, including the hair on your head.
Although men have higher testosterone levels, women also have small amounts of testosterone and other androgens in their bodies. Declining testosterone levels can cause hair thinning and loss in both genders, but the effects are much more pronounced in men.
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