I am Han nationality. Why are there many red and gold beards in my beard?

There are two possibilities: one is genetic variation, inherited. Second, the living environment, soil and water, diet and other possible effects on the human body.

Beard, commonly known as beard, refers to the hair that grows on men's upper lip, chin, cheeks, cheeks or neck. Men after puberty generally have beards. Beard grows faster than hair, which is the result of androgen.

If we want to distinguish carefully, "Hu" originally refers to the hair that grows on the mouth, while the upper lip is called "moustache" (in Cantonese, moustache, moustache and two-lipped beard), the chin is called "goatee" and the temple is connected with the chin.

Growth and development

A long beard is a sign of a man's secondary sexual characteristics. The emergence of secondary sexual characteristics is stimulated by androgen secreted in the testis after men enter puberty. There are few male hormones in boys before puberty, and there is little difference between male and female signs. There is no strict time limit for boys' puberty development.

Beards grow quickly. A healthy man's beard grows 0.4 mm a day, which is faster than his hair (0.2 ~ 0.3 mm a day). This is because the blood vessels in the beard are more distributed than the hair roots, and nutrients are easy to get.

The average adult has about 25,000 beards, which vary greatly according to different individuals. Men begin to grow beards in their teens, and they grow most luxuriantly around the age of 30, and will gradually decrease after the age of 30, so the beards may not be shaved more and more.