The role of appropriate and targeted supplementation of whey lactoferrin complex powder: 1, can prevent and correct the occurrence of iron deficiency anemia, because the lactoferrin in whey lactoferrin complex powder has a strong binding force with iron, can enhance the absorption rate of iron, in the prevention and correction of iron deficiency anemia is very obvious. 2, can improve the effectiveness of the treatment of infectious diseases, because the lactoferrin and iron binding ability is very strong, and can compete with bacteria to inhibit the binding of iron, by competing for iron can make bacteria die faster, has a good effect on improving the treatment of infectious diseases. It can competitively inhibit iron binding with bacteria, which can make the bacteria die faster by competitively grabbing iron, which has a good effect on improving the treatment effect of infectious diseases.