The reasons why hair is not black include genetic factors, permed and dyed hair, sun exposure hair, malnutrition and so on.
1. Genetic factors: under normal circumstances, due to genetic factors, the elders have hair is not black or less white, the offspring is prone to the phenomenon of hair is not black, will not affect the health of the body, is a normal phenomenon.
2. Hair perming and dyeing: If you dye your hair with other non-black hair colors, your hair will not be black. Frequent perming and dyeing of hair damages the hair and scalp follicles, which can also lead to hair that is not black, showing dryness and yellowing.
3. Exposure to the sun hair: go out without good sunscreen, so that the hair is often exposed to sunlight, destroying melanin, hair is also prone to the phenomenon of not black.
4. Malnutrition: long-term picky eating, dieting, less food, etc., resulting in malnutrition of the body, the hair will also lose nutrients and yellow.
There are many reasons why hair is not black, it is recommended that patients according to their own situation, if necessary, to the regular hospital dermatology department, follow the doctor’s instructions for a clear diagnosis, active treatment.