Women’s hair loss may have two causes: First, due to the decline of metabolic function, especially the decline of protein metabolism, so that the supply of nutrients decline, the lack of adequate supply of nutrients to the hair can cause hair loss. Second, it may be due to the lack of B vitamins, due to the decline of intestinal absorption of some patients, resulting in the lack of B vitamins, vitamin B2 decline can cause hair follicle oil, hair follicle blockage after causing hair loss. Vitamin B6 can make the iron absorption decline, hair nutrition decline, and anemia, etc. Vitamin B12 is also to promote the nutrient metabolism of hair follicles, it can harm the hair follicles cause hair loss phenomenon, so the lack of metabolic protein and B vitamin deficiency can make women easy to lose hair.