Why can't China people keep the thick beards of Europeans and Americans?

Anthropologist Joseph Denick found that people with the most beards and body hair include Ainu, Iranian and Australian aborigines, Todarans, Dravidians and melanesians, while American Indians, Bushmen, Mongols and Malays have relatively less hair. Hairy men have thick beards, eyelashes and eyebrows, but their hair is often sparse.

A beard is a collection of hairs that grow on the faces of human beings or some non-human animals: lips (moustache), chin (goatee), cheeks and sideburns. Commonly known as beard in China. Visually, the beard extends from the cheeks to the chin, hence the name beard.

In humans, only teenagers and adult men usually grow beards, but some women with hirsutism or endocrine disorders often grow beards.

Extended data:

The development of beard begins in adolescence. The growth of beard is related to the stimulation of dihydrotestosterone on facial skin hair follicles. After puberty, dihydrotestosterone continues to affect the growth of beard. Hair follicles in different skin areas are affected by hormones differently, some are stimulating and some are inhibiting.

Dihydro testosterone is also the main cause of male baldness. Dihydro testosterone is obtained by the reaction of testosterone in the body. During the year, the testosterone level in the body is different in different seasons, so the beard often grows faster in summer. In the early stage of scientific research, it is difficult to quantify the growth of beard due to the limitation of technology, so there is a great controversy when studying the evaluation of short-term beard storage effect with hormone activity.

Beard can be regarded as an indicator of the overall state of men. The amount of facial hair will affect the attractiveness of men. Because beards tend to fall into activities that are dangerous to their lives, biologists speculate that beards must have other very strong evolutionary advantages to offset the negative effects of this risk.

Beard often symbolizes the high testosterone content in men. It has been found that the high testosterone content is related to the immunosuppression process, which is beneficial to the spermatogenesis process.

References:

Baidu encyclopedia-beard