Lactoferrin belongs to a nutrient in the food, there is no direct enhancement of resistance, generally have no effect on resistance, and can not replace the direct treatment of the disease. Lactoferrin is a glycoprotein in breast milk, commonly found in mammalian milk, its role is mainly to combine with iron, transfer iron, participate in the body’s iron metabolism. Lactoferrin can increase the body’s iron absorption, iron and the body’s immunity correlation exists, so it has a certain degree of influence on the resistance. We can maintain our own resistance through a reasonable diet and active exercise, can be appropriate to eat more food rich in high quality protein, such as fish, beef, milk, eggs, soy products, etc., from the overall to ensure balanced nutrition. If the immunity is low, it is recommended to consult a doctor in time to rule out diseases and other factors.