Many superfoods may help support your immune system by providing essential nutrients and immune-boosting compounds. Citrus fruits, such as oranges, grapefruits, lemons and limes, are rich in vitamin C, a key nutrient that stimulates the production of white blood cells, crucial for immune function. Garlic contains allicin, a compound renowned for its antimicrobial properties, potentially aiding the immune system in combatting infections. Other superfoods you may want to try include almonds, bone broth, kombucha and salmon.