Hemoglobin 70 grams belongs to moderate anemia. How long can anemia 70 grams be recovered is related to the type of anemia. If it is hemorrhagic anemia caused by acute trauma blood loss, if you eat normally after stopping the bleeding, you can usually recover in about 2 weeks. If the hemoglobin is 70 grams caused by iron deficiency anemia, it usually takes about 6 weeks for the hemoglobin to return to normal after giving iron treatment, such as ferrous sulfate and iron sucrose. However, in the case of iron deficiency anemia, after the hemoglobin is normalized, it is best to continue to take oral iron for 2-3 months to make up the ferritin, otherwise it is easy to relapse. In the case of folic acid or vitamin B12 deficiency, which causes megaloblastic anemia, the hemoglobin can be close to normal when folic acid and B12 are supplemented for about one month.