What is heart-protecting hair?

Heart protection hair is actually chest hair. The growth and development of human hair is controlled and inhibited by androgen and estrogen, which have special stimulation or inhibition effects on the growth and development of hair in different parts of the human body. Male hormones stimulate the growth and development of beards and chest hair, while estrogen inhibits their growth and development, so boys have beards and chest hair.

In addition to male androgens, chest hair is closely related to genetic factors. The characteristics of the previous generation will be passed on to the next generation, not only the height and figure, but also the appearance of eyes, the length of nose, the height of stork bone, the size inside ears and the shape of breasts. Nature also includes the number and actual position of chest hair.

There is no direct correlation between the growth and development of male chest hair and age. The key lies in male androgen and genetic factors. Because it is a physiological factor for boys to have chest hair, there is no need to blame too much for it, just like the difference between men and women.