Supplement: What is the growth rate of hair related to?
I) glands
① gonad: Androgen plays an important role in stimulating the growth of hair mother cells.
② Adrenal gland: If the androgen secretion of adrenal cortex is strong, it can cause hirsutism in women. But it is also related to the function of pituitary gland. If the pituitary gland function deteriorates, the hair may be reduced or shed.
③ Thyroid gland: Normal thyroid function plays an important role in hair growth. If it is dysfunctional, the hair on the outside of the eyebrows (1/3) will fall off. When the function declines, not only the color will be grayish white, but also the hair will decrease or fall off. The growth and shedding of hair are mainly controlled by the growth period of hair itself, but also influenced by race, endocrine, disease, mental state, gender, age, season and other factors.
(1) Race: Racial differences are obvious phenomena. People of different races not only have different hair colors, but also have different hair quantity and growth conditions. Baldness is common among whites, less in China and even rarer among Indians. (2) Heredity: In the same family, the growth of hair is often roughly the same. Male baldness is closely related to heredity.
(3) Endocrine: Androgen can directly act on hair follicles, leading to male baldness. People who lack androgen stimulation (such as eunuchs) will not have this phenomenon. Estrogen has the function of antagonizing androgen, so women seldom go bald before menopause. Hair thinning when thyroid hormone is insufficient, hair loss when adrenal gland function is low, and the function of anterior pituitary gland is reduced, which can lead to total baldness.
(4) Mental state: nervousness, fear and anxiety can obviously increase hair loss. It is reported that a condemned man loses more than 1000 hairs every day after being sentenced.
(5) Vitamins: Long-term lack of vitamin A will lead to thinning hair; Lack of vitamin B2 will increase sebum overflow, which will increase sebum overflow and make hair fall off easily. Vitamin B6 deficiency can lead to abnormal sebum secretion. Oral contraceptives can speed up metabolism and consume more vitamin B6, which may be related to diffuse hair loss in some women. In addition, vitamin B6 can affect the process of pigment metabolism, and when it is lacking, hair will turn gray and grow poorly; Deficiency of pantothenic acid (also called vitamin B3) will make hair turn white and grow poorly; Inositol belongs to vitamin B family, which can prevent hair from falling off. Lack of biotin (also known as vitamin H2) can make hair fall off; P-aminobenzoic acid also belongs to B vitamins, which can protect hair color and maintain normal hair growth. (6) Trace elements: Some scholars have observed the changes of trace elements such as zinc, iron, molybdenum, calcium, lead, magnesium, manganese and selenium in hair, and found that the values of zinc, copper, iron and manganese in patients with alopecia decreased significantly, while the values of calcium, magnesium and selenium increased significantly, and there was no difference among patients with atypical alopecia. Copper deficiency will affect the absorption and utilization of iron, poor iron metabolism will lead to anemia, mental excitement and other symptoms, the latter can be the cause of alopecia areata, copper deficiency will also affect the process of hair keratinization, thus affecting hair growth; Calcium plays a role by combining with calmodulin, and high calcium concentration may change the immune regulation function of the central nervous system, thus leading to hair loss; Excessive selenium will lead to hair loss due to autoimmune reaction and sebum overflow.
(7) Diseases: Some systemic diseases, such as febrile diseases, anemia, malnutrition, liver diseases and serious chronic wasting diseases, often lead to thinning hair.
(8) Gender and age: Women's hair grows faster than men's, and young people grow faster than the elderly, but this difference is not great. With the increase of age, the number of hair follicles in the head decreased significantly. According to statistics, according to the number of hair follicles per square centimeter, there are 6 15 in 20-30 years old, 485 in 30-50 years old and 435 in 80-90 years old.
(9) Other factors: Hair grows slightly faster in summer than in winter. This is because the increase of temperature can promote vigorous metabolism and lead to faster hair growth. Hair grows faster during the day than at night. X-ray can control sulfhydryl compounds in hair follicle matrix, thus causing temporary hair loss. Some chemical factors such as iron will affect the formation of keratinization, which may interfere with cystine's participation in keratin composition, thus affecting hair growth. Ultraviolet rays, drugs, trauma, chronic inflammation, dermatosis, local massage stimulation, etc. It also has a certain influence on the growth and shedding of the head.
So far, in the hairdressing questions I have received from readers, the growth rate of hair is often mentioned. Many readers wrote to tell us the secret recipe they heard to make hair grow faster. For example, wash your hair with eggs and trim your hair at least once a month. And these are exactly what we call "hair witchcraft" in the industry. In other words, these "secret recipes" that can make hair grow faster have no scientific basis at all.
In short, apart from pregnancy and illness, no matter how much you care about hair growth, generally speaking, a person's hair can only grow half an inch at most a month. The growth rate in summer will be slightly faster than that in winter.
The study of various hair problems actually belongs to a rigorous discipline-"trichology". So far, the structure, physical and chemical characteristics and growth law of hair have been well studied. As mentioned above, all kinds of "hair witchcraft" are not based on pure accidental probability speculation. On the contrary, they have existed since the beginning of modern science.
Then, since all kinds of "secret recipes" that can make hair "grow faster" are futile, can't we do something about the growth rate of hair? In fact, although there is no way to grow faster under the current technical conditions, it is easy for us to find out the factors that slow down the growth of hair, and there are many. For example: almost no care for hair, malnutrition or unscientific diet, diseases, drug effects, hair loss caused by natural aging of men and women, etc. In addition, mood and stress are also influencing factors.
Some of the factors mentioned above do not directly affect the growth rate of hair, but affect the health of hair skin, thus affecting hair growth. Want to find a better hair care method, in addition to the quality and choice of daily shampoo and hair care products, you can also take a proper amount of multivitamins every day to make your hair healthier. Moreover, such multivitamins do not need to buy those expensive ones, and there is no need to waste money on those so-called "advanced" vitamins that are particularly expensive. It should be noted that unless you are pregnant or seriously ill, the average person's body does not need as many vitamins as possible a day. In other words, you can't pour twenty gallons into a container with only ten gallons.
It is often heard that some women, even men, take hair tonic to make their hair grow faster. In fact, it is the hormone level of expectant mothers that is related to the growth rate of expectant mothers' hair, not those drugs, so please don't be so futile.
That's the truth. Although you won't like this answer, it does exist in science. If you insist on believing in "hair witchcraft" or using the so-called "universal oil", the result is just futile and losing weight with your wallet.
According to the doctor.
The principle that ginger slices can be rubbed frequently can accelerate a lot is that it can promote blood circulation (it is said that pepper water has the same effect, but whether it can be tried or not should be considered clearly).
Nutritionists say
Hair is mainly composed of keratin, which contains a variety of amino acids and dozens of trace elements. Protein's hair will turn yellow and split if he lacks iron. Without vegetable oil, vitamin A, protein and iodine, hair will be dry, dull and easily broken. When vitamin B group is deficient, seborrheic dermatitis and alopecia will occur.
Therefore, you should eat the following foods:
Eat more sulfur-containing protein: eggs, milk, lean meat, beans, fish shells, yeast, etc.
Eat more vegetables and fruits: it contains many trace elements necessary for hair quality.
Eat more vitamin B6 and vitamin E: Vitamins can prevent white hair and promote hair growth. Such as cereals, peanuts, beans, bananas, yeast, honey, eggs, pork liver and so on.
The saying circulating on the Internet:
0 1. Two different brands of shampoo are used alternately.
02. Wash your hair frequently and keep good cleaning habits (note 1).
03. Comb your hair often, and you can comb it backwards, which is helpful for the blood circulation and growth of the scalp.
05. Massage your head or stand upside down or tilt your legs against the wall, which can accelerate blood circulation to your head and promote hair growth.
06. When swimming, water can moisten and massage the head, and frequent swimming will make the hair grow quickly and thickly.
07. Contraceptive shampoo (Note 2).
08. Wash your hair with ginger and sorghum.
09. Wash your hair with the juice squeezed from grapefruit peel.
10. Maintain good eating habits, avoid partial eclipse, and eat more foods from protein (such as meat, liver, egg products, soybeans, yogurt, cheese, etc. ), calcium, gum (fish food), dark vegetables.
1 1. Add rosemary+geranium/sage+mint to shampoo.
(Note 1)
The most suitable time for shampooing is once every two to three days, which can keep the scalp clean and keep its blood circulation good. Choose a good shampoo and never use a double-effect shampoo!
Wash it clean. Do more hair care or scalp care, so that the water lipid membrane and oil secretion and metabolism of the scalp can be normal and smooth. Massage the scalp can promote the blood circulation of the scalp, and then make the hair grow rapidly.
(Note 2)
You can use birth control pills to wash your hair or do hair care, because estrogen can promote hair growth, or you can buy estrogen and use it directly. The effect is better, but this is a prescription drug that doctors can't use indiscriminately, and rumors may lead to early cancer.
How to use birth control pills? Contraceptive pills mainly contain a lot of lutein and female hormones. The method of use is to grind it into powder and mix it with shampoo or conditioner, but it is best not to use oily hair care oil, because the medicine must contact the scalp to play its role. If it is too oily hair care oil, it will cause pore blockage. Legend has it that it will increase significantly after three to five uses. As for whether it is credible, it will cause lesions. This is also reported by others, and then reported by doctors. The credibility cannot be completely confirmed.
The method of P.S. Note 2 is a bit dangerous and is for reference only.
The old man said:
Every time you wash your hair, apply an egg and conditioner on your head, wrap it in a towel 15 minutes and wash it off. It worked miracles.
Many unknown folk remedies say:
After washing the hair with tea leaves, it can make the hair black, supple and shiny.
Beer hair care first washes and dries the hair, then spreads beer evenly on the hair and massages it to make it penetrate into the hair roots. /kloc-Wash with water after 0/0 minutes, which can not only make hair shiny, but also prevent hair from drying out and promote hair growth.
For vinegar egg hair care, first add a little protein into the shampoo and stir it evenly, then shampoo and gently massage the scalp. Then wash it, add a little vinegar and fresh egg yolk, mix well, smear it slowly along the hair, wrap it with a wet towel 1 hour, and then wash it with water. This method is most suitable for dry and hard hair.
Onion Mud Hair Care First, mash the onion, wrap it in gauze, and pat the scalp gently with it to make the onion juice evenly spread on the scalp and hair. After a few hours, you can get rid of annoying dandruff by washing your hair again.
Honey egg oil hair care with a spoonful of honey, a raw egg yolk, a spoonful of vegetable oil, two spoonfuls of shampoo and an appropriate amount of onion juice, mix well and apply it to the scalp. Put on a plastic film hat, and then keep it hot with a wet towel outside the hat. Wash your hair in an hour or two. If you insist on it once a day, after a period of time, you can relieve the symptoms of thinning hair.
25 grams of pomelo seeds for hair care are soaked in boiling water, dried, and the juice is applied to hair roots, or applied with ginger two or three times a day, which can treat alopecia and yellowing and accelerate hair growth. Take aged vinegar for hair care 150ml, add warm water 1kg and mix well. Wash your hair once a day with this liquid, which can remove dandruff and relieve itching, prevent hair loss and effectively reduce hair split.
In addition, spraying some old vinegar on your hair before haircut can make your hairstyle last and make your hair soft and moist.
A medical method comprises boiling Folium Mori and Folium Sesami in half water, and washing hair. After half a month, hair can grow quickly. Please try it quickly. Useful!