,Deficiency of a certain vitamin, so which vitamin is lacking in hair loss? For example, vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin D, and vitamin A.　　A deficiency of vitamins such as vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin D, and vitamin A can easily lead to baldness, as these vitamins promote hair growth. Therefore, you may want to eat more bran bread, black rice, coarse flour, animal liver, egg yolk, fish, pork, milk, fruits, green leafy vegetables, soybeans and other foods containing these vitamins.　　If you are deficient in vitamin D, it affects the normal development of the hair, resulting in hair that is too thin and soft. Therefore, you may want to eat more animal liver, egg yolks, a variety of fish, dried mushrooms and other foods containing vitamin D.