According to the World Health Organization, anemia is diagnosed according to the level of hemoglobin in the body, and the requirements for hemoglobin indicators vary by gender and age. Anemia is diagnosed in children younger than 6 years old with hemoglobin <110g/L, in children aged 6-14 years old with hemoglobin <120g/L, in adult men with hemoglobin <130g/L, in adult women with hemoglobin <120g/L, and in pregnant women with hemoglobin <110g. Hemoglobin is the main component of red blood cells and consists of iron ions and pearl protein. The protein reserves in the human body are very rich, but the iron content is limited, therefore, most of the problems of anemia appear in the iron ions.