1, hair thickness, quantity, straightness and color are highly heritable.
2. If, compared with usual, the state of hair suddenly changes obviously, and the amount of hair falling off increases obviously compared with the daily average, it is usually a sign of the decline of health.
3, mental stress and emotional stimulation can cause hair loss, even a large number of hair loss in severe cases, which will lead to partial scalp baldness.
4, malnutrition can also cause hair loss. For example, in the case of obvious shortage in protein, hair not only grows slowly, but also falls off easily, and the quality becomes worse, becoming thinner, more brittle, drier and lighter in color.
Extended data:
Related material factors affecting hair quality:
1, protein: The essence of hair is keratin, which is a kind of protein; The formation of hair melanin also needs an amino acid called tyrosine as a raw material.
2. Vitamins and trace elements: In the process of producing melanin and keratin, a variety of B vitamins and trace elements are needed, and these nutrients come from food.
3. Meat and nuts are good sources of trace elements, such as iron, zinc, manganese and zinc. If they are insufficient, the hair quality will also be affected. The so-called saying that eating black sesame seeds to make up hair is actually because black sesame seeds are rich in trace elements. But black sesame also contains a lot of oxalic acid and phytic acid, and its absorption rate is much lower than that of meat. If you eat black sesame seeds and meat, the effect will be much better.
People's Daily Online-Shaving your head can change your hair quality? Japanese media tell you whether this rumor is true or not.
People's Daily Online-What is the lack of hair quality?