A phenomenon that best proves a man's physiological ability

The reason why men grow beards is the result of androgen, a hormone secreted by the male reproductive organs (testicles).

The stronger the male reproductive function, the faster the beard grows

Recent studies have confirmed that the blood vessels that supply beard growth are more abundant than those at the roots of hair and are more easily nourished. Coupled with the stimulation of androgens, beards grow faster than hair, growing an average of about 0.40 mm per day (hair grows 0.27-0.40 mm per day). The stronger the male reproductive function, the faster the beard grows.

Of course, the growth of beard is also affected by hair follicle receptors. The more hair follicle receptors there are, the more "luxuriant" the beard grows. Because of the existence of hair follicle receptors, men with strong androgen secretion have very different beard shapes. Those with more receptors have denser beards, while those with fewer receptors have sparser beards. Due to genetic factors, everyone's beard is different. Some are like Li Kui, with full beards, some are like Yan Qing, with dots, some are like Guan Yu, with a long beard, and some are like Sun Quan, with a line hanging from the sky. However, no matter how strange your beard is, when it no longer "grows vigorously" as before and suddenly becomes sparse or even falls off, your sexual function will also show a downward trend like the number of beards.

Beards grow naturally and usually begin to grow during puberty, when the hair is quite soft.

After puberty, male beards generally grow faster than their hair. This is the result of the effects of male hormones. In adulthood, the color of the beard is generally the same as the hair, and the texture becomes harder. At this time, sexual function also tends to be stable.

After adulthood, there are two main reasons why beards grow wildly. One is when the body secretes too much androgen, such as adrenal tumors, and the beard will grow wildly under the stimulation of excessive androgen; the other is when taking too much androgen and its products, resulting in excessive androgen in the body, which will also cause the beard to grow wildly.