The reason of hair oil? 1, personal physique problems Personal physique problems may be inherited from parents with oily hair, or due to a long-term high-fat food-based diet, greasy and spicy can stimulate the secretion of sebaceous glands, resulting in excessive oil secretion phenomenon. 2, wash hair too often Many people have a misconception that frequent hair washing to keep hair dry can say goodbye to greasy, but when the scalp follicles increase, resulting in more frequent sebum secretion, hair more greasy only to find that this is wrong. Under normal circumstances, a healthy scalp will definitely contain oil, too much washing will make the sebaceous glands secrete more oil to protect the scalp, resulting in the more you wash, the more oily the situation appears. Generally speaking, if you do not sweat, the frequency of good hair washing is once every other day. 3, lack of vitamin B Nowadays, people have better living conditions, but the lack of certain nutrients or trace elements is more, because many people have the habit of picky eating. Lack of vitamin B in the body is the main reason why many young people’s hair is prone to oil, and vitamin B has precisely the function of inhibiting oil secretion. 4, endocrine disorders Endocrine has an important impact on hair oil, sebaceous glands produce sebum by androgen decision, especially women, too high androgen is the culprit of hair oil. In addition, long-term stay up late is easy to cause endocrine disorders.