Vital Nutrients Aller-C An antioxidant for the maintenance of good health. Helps in wound healing. 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 active flavonoids. This formula can be used for maintaining and supporting proper levels of enzymes and physiologic factors necessary for normal respiratory and sinus function.