White hair
It is regarded by people as one of the characteristics of getting older
As people get older
Wrinkles grow on the face
The hair also turns gray
But there are some people
He also grew gray hair when he was young
We call it "less whiteheads"
There are also some people
When life encounters major changes
I have had the experience of "a night of sadness"
What happens to black hair to white hair?
What about less whiteheads?
Let's explore the secrets of gray hair today
How does white hair grow?
Our hair contains a lot of melanin particles in both the pulp and cortex, which can lead to all or part of the hair turning white when this substance is reduced or when the hair is filled with air.
Specifically, the blood vessels rich in nutrient-rich hair in the hair papilla of normal hair can provide sufficient nutrients for the hair papilla and hair balls, promoting the smooth synthesis of melanin particles.
When the formation of melanin particles in the hair papilla and hair balls occurs, or due to various unfavorable factors, it cannot be smoothly transported to the hair, which will lead to the lack of enough melanin particles in the hair pulp, cortex, etc., resulting in white hair.
◎Why do I grow gray hair? ◎
Factors that contribute to the appearance of gray hair can be divided into congenital and acquired factors.
Congenital
Albinism: A congenital genetic disorder in which a genetic defect leads to a lack of melanin in the body
Mottled disease: a skin disease characterized by congenital hypopigmentation
Autosomal recessive phenylketonuria can also lead to depigmentation and gray hair
Fanconi syndrome with defects in the function of the proximal tubules of the kidneys
Acquired
Acquired vitiligo caused by depigmentation
Autoimmune pernicious anemia
Hair hypopigmentation caused by some drugs
Early leukocymy
Caused by a variety of chronic wasting diseases: tuberculosis caused by mycobacterium tuberculosis, diabetes mellitus due to metabolic disorders, and hypothyroidism due to insufficient or absent thyroid hormone synthesis, secretion, or biological effects
Nutrient deficiency hair hypopigmentation: general malnutrition; lack of protein needed by the body; lack of trace elements such as iron and copper
◎ What is "a night of sad whiteheads"? ◎
The old Chinese saying has a cloud: "Laugh and laugh, ten years less; a sorrow, a white head".
After the research of many scientific researchers, it has been found that overloaded stress does promote the occurrence of gray hair, and some white hair emerges overnight, and when the pressure is relieved, the white hair may return to its original state.
Some studies have reported that stress does accelerate the turning of black hair into gray hair, and found that when the pressure becomes less, black hair may regenerate!
Researchers at the University of Bradford in the United Kingdom have another insight into the causes of long white hair, they believe that the human body will continue to wear out over time, resulting in hydrogen peroxide will accumulate in large quantities at the root of the hair, thus preventing the production of pigment.
◎ What is "less whitehead"? ◎
We often say "less whiteheads", which means that the hair turns gray prematurely, and the hair is grayed in adolescence or in the 20s. Normally, it is only after the age of 35 that the pigment cells of the hair begin to decline and gray hair appears.
So what causes this to happen?
1. Lack of exercise: The decrease in exercise can lead to poor blood circulation, no effective blood supply to all corners of the scalp, and melanocytes cannot function properly.
2. Irregular life or lack of sleep can lead to a decrease in the secretion of growth hormone and a slowdown in blood circulation throughout the body, resulting in gray hair.
3. Young people are picky eaters and irrational eating habits, resulting in serious imbalances in nutritional intake. Melanocytes do not provide enough nutrients when they work to produce melanin to supply hair, so they are prone to gray hair.
4. Mental workers who regularly use their brains are in a state of excessive brain use and excessive mental stress for a long time, coupled with the combined effect of the above three conditions, so they are prone to premature gray hair.
◎How to prevent gray hair? ◎
Teenagers should maintain a good attitude, avoid excessive sadness and mental stress; pay attention to a reasonable diet, balanced diet, not picky eating and excessive weight loss. Because these adverse factors can cause the blood vessels that supply the hair follicles to spasm, which has an impact on the nutrition of the hair roots, so that melanin cannot be transported to our hair.
Gray hair is also associated with learning stress and anxiety, and some adolescent gray hair can be improved through nutrition and emotional regulation.
The daily intake of insufficient copper can also lead to the production of white hair, generally our average daily intake is only about 0.8 mg, while the normal need for copper is 2 mg. Therefore, nutrition experts recommend eating more copper-rich foods such as animal liver, shellfish, fungi, nuts, apricots, and oats, which are very helpful for maintaining black hair, and the use of copper utensils in life can help us inhibit the formation of white hair.
Source: Popular Science China
Guangzhou Daily New Flower City Editor: Ye Bijun