Anemia in young children, there is no fastest way to replenish blood. It should also be differentiated according to the etiology. If it is iron deficiency anemia, macrocytic anemia caused by lack of vitamin B12 and folic acid, it can be treated with dietary supplements or supplements; if it is non-nutritional anemia such as thalassemia and serosanguineous disease, it needs to be treated by blood transfusion. 1. Iron deficiency anemia: Dietary supplements can be given to foods rich in iron, such as pig liver, high iron rice flour, animal blood products, etc. Above moderate anemia needs to be treated with oral ferrous sulfate under doctor’s guidance, and severe anemia can be considered to be treated by blood transfusion. 2. Macrocytic anemia caused by lack of vitamin B12 and folic acid: seafood, fish, milk and other animal foods are rich in vitamin B12; green vegetables are rich in folic acid. Macrocytic anemia can be improved by eating the above foods. If necessary, take oral folic acid tablets and other treatments. 3. Non-nutritional anemia such as thalassemia and serosanguinosis: dietary supplements can not improve the situation, and moderate-to-severe thalassemia requires blood transfusion. Dietary supplements can only solve part of the problem of nutritional anemia, for non-nutritional anemia, dietary supplements are ineffective. It is recommended to actively seek medical treatment to find out the cause of anemia, and not to rely only on dietary supplements, nor to blindly supplement iron or blindly use medication.