What kinds of foods have immune boosting power? Protein is important in the diet to improve your immune system. Some good sources of protein include eggs, beans and peas, seafood, and lean meat. Some vitamins that are important to improve immune health include vitamin A, vitamin E, and vitamin C. Vitamin A keeps the skin and mouth tissues healthy so that infections cannot enter the body. Some sources of vitamin A include sweet potatoes, carrots, kale, and spinach. Vitamin E forms antibodies which gives the immune system a boost. Sources of vitamin C include grapefruit, oranges, papaya, and strawberries. Vitamin E works as an antioxidant to improve immune health. It neutralizes free-radicals. Sources of Vitamin E are sunflower seeds, almonds, hazelnuts, and spinach. Zinc is also important to include in the diet. Zinc helps wounds heal and helps the immune system work properly. Zinc can be found in lean meat, poultry, whole grains, and beans. So to avoid getting another cold or becoming sick, add these foods to your diet and stay healthy!