Zinc-containing foods include lean pork, mutton, animal liver, crab meat, shrimp skin, chicken, chicken and duck yolk, hairtail, sardines, long-term fish, yellow croaker, laver, soybeans, white radish, carrots, eggplant, corn flour, millet, wheat, celery, potatoes, Chinese cabbage, apples and bananas. Apple is known as "fruit of intelligence" and "fruit of memory". It is not only rich in trace elements such as zinc, but also rich in nutrients such as lipids, carbohydrates and multivitamins, especially high in fine fiber. Eating l-2 apples a day can meet the requirement of zinc. Zinc is completely provided by food, and foods with high zinc content include apples, sunflower seeds, mushrooms, onions, bananas, cabbages and various nuts.