1, vitamin C-rich foods: a variety of fresh vegetables and fruits, such as mustard, capers, cauliflower, parsley, green garlic, persimmon peppers, citrus, fresh dates, hawthorn, a variety of radish, cabbage, grass enzyme, mung bean sprouts, beans, tomatoes, asparagus, lettuce, bananas, apples, apricots, kiwi and so on. 2, rich in vitamin A food: chicken liver, beef liver, duck liver liver, scallops, eggs, carrots, sweet potatoes, pea shoots, rape moss, persimmon peppers, celery, lettuce leaves and so on. 3, rich in allicin food: garlic, green onions. 4, food rich in trace elements: meat, seafood, grains, garlic, green onions, sesame seeds. 5, food to improve immunity: kiwi, figs, apples, sardines, honey, milk, pork liver, monkey mushrooms, sea cucumbers, oysters, squid, sharks, seahorses, turtle, yams, turtles, mushrooms and so on.