According to scientific calculation, the total number of adult hair is about 80,000-1, and 20,000 hairs are replaced every 2-6 years.
The reason why hair turns yellow
Hair is like a grain seedling. When encountering drought or lack of nutrients, it is bound to wither, yellow, rot and fall off easily. Almost all hair loss and hair quality problems can ultimately be attributed to the nutritional supplement and metabolism of hair.
For example, hair loss is a manifestation of the self-balance mechanism of human nutrition. When nutrition supply is insufficient, it is necessary to "cut off" a part of hair to achieve a balance between supply and demand of nutrition.
In the case of continuous shortage of nutrition supply, "layoffs" will not stop. Only supplementing the nutrition needed by hair to solve the problem of hair loss is the fundamental and effective way, because hair is a kind of growing and developing human tissue, and it also needs to absorb nutrition to ensure normal growth and development.
Fortunately, young people's ability to absorb and metabolize nutrients is still very strong. As long as the method is right, this problem is not difficult to solve! Therefore, it is suggested to nourish strong hair by supplementing nutrition, just as supplementing nutrition can make a weak body strong.
This should be said to be the most effective palliative method! The "nutritional shampoo" with chemical synthetic substances as the main raw materials and some plant ingredients is mainly used to clean hair, and it is impossible to have any influence on hair growth.
Food that helps hair grow.
walnut
According to China medicine, walnuts are warm, sweet and non-toxic, and have the effects of invigorating stomach, enriching blood, moistening lung and nourishing heart. In the Song Dynasty, Liu Han and others recorded in Kaibao Materia Medica that walnut kernel "makes it fat and healthy, moistens muscles, has black beard and black hair, eats more diuretics and removes five hemorrhoids."
Vitamin E contained in walnut kernel can protect cells from oxidative damage caused by free radicals. Regular consumption can moisturize the hair and make the skin moist, smooth and elastic. It is an anti-aging substance recognized by the medical community, so walnuts are called "Long live my son" and "longevity fruit".
Therefore, you can eat five or six walnuts a day to protect your hair, or you can mash walnuts with rock sugar into "walnut paste", hide them in a porcelain jar, eat two spoonfuls at a time and brew them with boiling water. When cooking, there is a layer of white liquid floating in the cup, which is "walnut milk", delicious; Regular consumption of walnuts can make hair black and shiny, which has a good effect on premature graying and withering of the hair. For example, cooking walnut porridge with walnut kernels and japonica rice is a good food for beauty salons.
In addition, you can also drink walnut dew directly, such as Yangyuan Six walnut dew, Walnut Almond Dew and so on. Experts interpret that nuts, such as walnuts, are not fully absorbed when eaten raw, which will waste some nutrients, so it is better to drink walnut milk.
2. Black rice
It is considered by Chinese medicine to have the edible value of nourishing yin and tonifying kidney, strengthening spleen and warming liver, improving eyesight and promoting blood circulation, blackening hair and enriching blood. Black rice contains pigments formed by the interaction between natural plants and sunlight, which can directly or indirectly regulate metabolism in the body and promote black hair; At the same time it can nourish hair follicle cells.
peanut
Peanut contains water, protein, fat, sugar, vitamins A, B6, E, K and minerals such as calcium, phosphorus and iron. Peanut is rich in cystine and methionine, which are the main components in hair, and can be used as nutritious food for hair care.
4. Olive oil
Vitamin B and E contained in olive oil can prevent hair loss, oil production, dandruff, dryness and split hair. Sometimes olive oil can also be used instead of shampoo or hair mask. Usually, a few drops of olive oil can be used in conditioner to care hair more deeply.
Extended data
How to care for hair
① Try to avoid scratching your scalp when washing your hair, and choose a shampoo that suits you.
(2) Reduce the use of hair dryers, because the temperature of hair dryers is too high during use, which will cause certain damage to hair. Therefore, in terms of hair care skills, try to avoid blowing hair at too high a temperature.
Don't wash your hair often. Too frequent shampooing will wash away the oil secreted by sebaceous glands, making the scalp and hair lose their natural protective film, which is not good for hair health.
Refer to Baidu Encyclopedia on how to care for hair.