There is no scientific evidence to prove that white vinegar shampoo has certain benefits, and white vinegar can cause damage to the skin, mucous membranes and so on. The main ingredient of white vinegar is 3%~5% acetic acid, but there is no scientific evidence whether it has the effect of removing dandruff. However, if you use white vinegar to shampoo your hair for a long time and in large quantities, the barrier function of the skin may be damaged due to the high content of acetic acid, which may cause consequences such as excessive skin peeling, allergies, and chemical burns. In addition, the volatility of white vinegar is also strong, so when shampooing hair, it is easy to irritate the mucous membrane of the nose and the mucous membrane of the eyes, resulting in conjunctivitis and other symptoms, so it is not recommended to use white vinegar for a long period of time to wash hair.