Scientists have found that iron is a hematopoietic element, and adults need 0.8- 1.5 mg of iron every day. Severe iron deficiency will affect their intellectual development, and experiments have also proved that drinking water and cooking with iron utensils such as iron pans can increase iron absorption. Because boiling water in an iron pot can release ferrous ions easily absorbed by the human body, it can supplement the needs of the human body, thus effectively preventing anemia.