Why do men grow beards?

It has to be admitted that beards have become an important symbol of masculinity on the male body. When people think of beards, the first thing that comes to mind is often men. After entering puberty, small fuzz will gradually appear on the male chin. As time goes by, these small fuzz will gradually become thicker and harder. Although most men grow beards around their chins, what are the causes of beards on men?

Beard growth is a secondary sexual characteristic of human beings, which is caused by the testicles, the gonads in men's bodies. The testicles have two very important abilities: one is to produce sperm, which is used to produce offspring; the other is to produce testosterone. Testosterone is a male hormone that promotes hair growth. Modern medicine believes that the hair follicles on a man's upper lip and cheeks contain an androgen receptor, which is quite sensitive to the effects of androgens, which is the main reason for beard growth. But in women's bodies, this androgen is very small and the dominant one is estrogen, which does not promote hair growth.

If there is an abnormal phenomenon between men and women: men do not grow beards, but women grow beards, it is most likely that there is a problem with androgen levels.

This is the result of androgen dominance in the male body. Many differences in physical appearance and even personality between men and women are affected by sex hormones. The difference is that men’s bodies are dominated by androgens, while women’s bodies are dominated by estrogen.

The growth of hair on our bodies, including our beards, is largely regulated by these two sex hormones. For hair in different parts of the body, the two have different effects. Estrogen promotes hair growth and inhibits beard and chest hair growth, while androgen has the opposite effect. This creates the phenomenon of "women have a lot of hair but no chest hair, and men grow beards"...

In addition, due to the different levels of sex hormones in each person's body, the sensitivity of hair growth to sex hormones is also different for each person. Therefore, it is common for men to have denser hair than women, or for women to have a little moustache under their noses.