There are eight kinds of vitamin B complex: vitamin B 1, nicotinic acid, riboflavin, pantothenic acid, biotin, vitamin B6, vitamin B 12, folic acid, which have little effect on enriching blood. B 12 will participate in bone marrow hematopoiesis, and folic acid will participate in the synthesis of hemoglobin and methyl compounds such as adrenaline, choline and creatine. Lack of them will cause anemia.