Lactoferrin is a member of the transferrin family, which is good and has many biological functions such as bacteriostatic, antiviral and immunomodulatory. Lactoferrin is an iron-binding glycoprotein with a molecular weight of about 80 kDa, which is commonly found in mammalian milk, and in addition to milk, lactoferrin is also distributed in exocrine fluids such as tears, bile and saliva. Numerous studies have shown that lactoferrin is a multifunctional protein with broad-spectrum anti-bacterial infection and the ability to regulate iron balance in the body. It should be noted that in normal life, we need to pay attention to nutritional balance, scientific and reasonable dietary combinations, to meet the body’s nutritional needs.