Low T can cause hair loss, and low E in women can lead to hair growth on face and arms etc.
Search "testosterone hair loss" You will see tons of sites backing claim, there is also many peer reviewed studies on the matter. There are other causes for hair loss, but low T is the only one you can do anything about.
>There are three main causes of thinning hair or balding in men:
-This is perhaps the most common reason for baldness and hair loss. If hair loss runs in your family and you are genetically predisposed to baldness, there isn’t much you can really do to stop nature from taking its course.
-Hormonal imbalances, such as low testosterone levels, can lead to a number of hair issues and they can cause coordinating health issues as well.
-Age is another one of those common causes that you simply cannot do anything about. The older you are, the more likely you will experience thinning hair or hair loss. In fact, by age 45, 1/3 of men will begin losing their hair and nearly all men experience some form of hair loss by age 70.