Tăng cường tiêu thụ thực phẩm giàu flavonoid. Uống thực phẩm chức năng tăng cường hệ miễn dịch. Cân nhắc việc dùng thảo mộc dạng trà hoặc thực phẩm chức năng. Tập thể dục điều độ.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
High flavonoid foods have anti-inflammatory properties, which may help with your allergies. These same foods are high in the substances quercetin and rutin. Quercetin and rutin are natural antihistamines. High flavonoid foods include:  Berries Red peppers Citrus fruit Bananas Pears Apples Onions Almonds Leafy green vegetables Olive oil Green tea Herbal teas such as parsley, nettles, and sage Some naturopaths believe that a weak immune system may make it easier for allergens to affect you. Incorp