Modern medicine has found that male hair loss is related to DHT (the metabolite of androgen) in the body, which leads to calcification, fibrosis, atrophy and death of hair follicles. Scientists still don't know whether DHT directly or indirectly causes hair follicle death, or why some people are affected by DHT and lose their hair, while others don't. Most scientists attribute it to the individual's genetic inheritance, and some scientists attribute hair loss to the individual's long-term internal inflammation.

In short, there is no doubt that DHT plays a role in a link of hair loss, so if the DHT in the body drops to a very low level, hair loss will stop or delay.

The eunuch cut off the testicles, so that the androgen in the body almost disappeared. If there are few androgens, there is almost no DHT (metabolite of androgens). Once there is no DHT, a link of hair loss will be destroyed, so it will stop or delay hair loss.

Of course, when you get older, hair loss will happen slowly, regardless of DHT. This is the process of aging. Judging from the preserved photos of ancient eunuchs, their hair seems to have fallen off a little, but it is impossible to determine whether it is hair loss or shaving by themselves. (See annex).

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Ancient eunuch pictures show that eunuchs also lose their hair?