Why does human hair come in a variety of colors

The color of hair is generally determined by genes and is commonly black, blonde, brown, and red. As humans age, hair usually turns silvery white.

Due to differences in race and region, hair comes in black, blonde, red-brown, red-brown, yellowish, gray, and even green and red.

Scientific research has proven that the color of hair is related to the different metal elements contained in the hair.

Black hair contains equal amounts of copper, iron, and melanin, and when the content of nickel increases, it turns grayish-white. Golden hair contains titanium, reddish-brown hair contains molybdenum, reddish-brown in addition to copper, iron, and cobalt, and green hair contains too much copper.

In some African countries, some children have red hair, which is caused by a severe lack of protein.

Extended information.

The hair's hue is made up of two main types of melanin: true melanin and melanin-like. True melanin is black or brown, and melanin-like is yellow or red. Both are produced from tyrosine in a series of reactions by the action of tyrosinase in melanocytes. The relative amounts of the two types of melanin determine the color of the hair.

It is a physiological process for people's hair to turn gray as they age. A hair is like a tube, which is filled with cells and pigments, and the space between the cells and pigments is full of fluid.

As we age, the hair grows more slowly, the activity of melanocytes begins to weaken, and the series of reactions prompted by tyrosinase gradually slows down. Next, the hair that is produced becomes lighter because it contains less melanin. There is also less and less fluid in the hair.

Finally, the melanocytes stop producing melanin altogether, the hair is filled with air, and the hair turns white.

The word "normal" is used here to emphasize that the gradual graying of hair as people age is a natural physiological process, while other factors affecting the graying of hair as described below are "abnormal".

She may have a disease that causes premature graying of hair, or she may have a serious endocrine disorder caused by excessive study and mental stress, resulting in premature graying of hair.

①Why does our hair have color? The hue of hair is mainly composed of two types of melanin: true melanin and melanin-like. True melanin is black or brown, and melanin-like is yellow or red. Both are produced from tyrosine in a series of reactions by the action of tyrosinase in melanocytes. The relative amounts of the two types of melanin determine the color of the hair.

② Hair turning gray as people age is a physiological process. A hair is like a tube, which is filled with cells and pigments, and the space between the cells and pigments is full of liquid. As we grow older, the hair grows more slowly, the activity of melanocytes begins to weaken, and the series of reactions prompted by tyrosinase gradually slows down. Next, the hair that is produced becomes lighter because it contains less melanin. There is also less and less fluid in the hair. Finally, the melanocytes stop producing melanin completely, and the air fills all the gaps in the hair, and the hair turns white.

③ Hair graying is the normal aging of hair, but other factors affect hair graying c genetic, disease and mental factors can also make hair gray. In our country, premature graying of hair is characterized by family clustering. The parents of a family with premature graying of hair will have their genes causing their children's hair to gray prematurely as well. Many diseases can disrupt the original balance in the body and cause endocrine disruption, leading to premature graying of hair. Hyperthyroidism, diabetes, ulcerative colitis, anemia, and nutritional deficiencies can cause premature graying of hair. Many people experience a series of rapid changes in their bodies due to extreme stress, sadness, and grief, resulting in serious endocrine disorders and the appearance of gray hair within a short period.