Apples:
Apples are a great choice if you want to boost your immune system naturally. Apple peel contains a potent flavonoid, i.e., quercetin, which acts as an antioxidant and helps in regulating the immune responses. The intake of apples efficiently helps in reducing the inflammation occurring due to any abnormality in the immune system. The flavonoids present in apples also helps in fighting against asthma and other allergic reactions. Apples enriched with antioxidants are very good for protecting the body from any oxidative damage occurring in the body.