What to take to replenish blood depends on the cause of ischemia. When ischemia occurs in the body, the best way to replenish blood is to actively look for the cause and give targeted treatment to remove the cause. If the ischemia is caused by nutritional anemia, it can be treated with oral iron under the guidance of a doctor; if it is aplastic anemia, it is necessary to correct the anemia, apply immunosuppressants and androgens to promote hematopoietic treatment, and if necessary, hematopoietic stem cell transplantation. Ischemia can be replenished by both food and medicine. Food: 1. Iron-containing foods: such as rape, capers, amaranth, animal liver, egg yolk, beef, mutton, fish, etc. Iron is one of the components of hemoglobin, which can transport and store oxygen in the blood and help to replenish blood; 2. Foods containing high protein: lean pork, chicken, duck, yellowtail, scallop, milk, shrimp, soy products, sunflower seeds, etc. High protein is involved in the composition of hemoglobin and can assist in blood replenishment; 3. Foods containing folic acid: such as broccoli, spinach, hazelnuts, peanuts, whole wheat bread, etc., prevent and relieve ischemia caused by megaloblastic anemia and can play a role in blood replenishment; 4. Foods containing vitamin C: such as green leafy vegetables, tomatoes, oranges, grapes, dates, kiwis, etc., can promote the absorption of iron and thus achieve the therapeutic effect. Second, drugs: 1, iron: clinically commonly used oral iron are ferrous sulfate, ferric ammonium citrate, ferrous fumarate. Iron can directly replenish the body’s iron to treat ischemia; 2. Folic acid: clinically commonly used for folic acid tablets, mainly for various causes of megaloblastic anemia resulting in ischemia, can also play the effect of blood replenishment.