There is no such thing as what is the fastest way to replenish blood for babies with iron deficiency anemia. Depending on the degree of anemia, you need to choose to treat it by eating iron-rich foods such as animal liver, animal blood, etc. or taking oral iron and other medicines. If the baby’s iron deficiency anemia is mild, you can eat more foods rich in iron, such as animal liver, animal blood, lean meat, kelp, spinach, soy products, black sesame and so on. You can also eat more foods rich in vitamin C, such as tomatoes, kiwi, strawberries, apples and so on, to improve the body’s metabolism. If the degree of iron deficiency anemia in babies is more serious, along with dietary treatment, oral iron, folic acid, vitamin B₁₂ and other medication should be taken under the guidance of a doctor to help alleviate the condition. When a baby develops iron deficiency anemia, it is recommended that he or she seeks medical attention for standardized treatment in a timely manner. In addition, drugs must be taken under the guidance of a doctor, not blindly taken on their own to avoid adverse consequences.