ALLER-C is a potent and effective combination formula. Quercetin and Hesperidin (from Citrus Bioflavonoids) have been shown to be two of the most useful and physiologically actie flavonoids. This formula can be used for maintaining and supporting the proper levels of enzymes and physiologic factors necessary for normal respiratory and sinus function, contains Quercetin and Hesperidin maintains normal respiratory and sinus function supports stable mast cells. These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. If you have a health concern or condition, consult a physician. Always consult a medical doctor before modifying your diet, using any new product or drug supplement.