The way black dates are cooked does not affect their blood tonic effect, but black dates are not a good ingredient for blood tonic. Usually blood tonic means iron supplementation. Food cannot cure iron deficiency anemia, but it can provide some iron. Black dates contain a certain amount of iron, and no matter what kind of cooking method is used, a certain amount of iron can be supplemented to the organism without affecting the effect of blood tonic. However, the iron content in black dates is not high. Every 100 grams of black dates contains 1.2 mg of iron, and the iron in it is plant iron, compared with animal food, its iron absorption rate is low, so it is not a good food source for iron supplementation. When the human body has iron deficiency, you can increase the amount of pig liver, animal blood products and red meat and other iron-rich foods. If iron deficiency anemia already exists, it is recommended to consult a doctor in time, under the guidance of the doctor to take medication, do not blindly rely solely on food, so as not to miss the condition.