• Supports healthy respiratory and sinus function* • Offers Isoquercitrin for superior bioavailability* • Supports stable mast cells* • Premium Vegan Formulation Best-selling supplement Aller-C with Isoquercitrin, Vitamin C, Bromelain, and Bioflavonoids to Support Healthy Respiratory and Immune Function* is a potent and effective combination formula designed to help maintain normal respiratory and sinus function.* Aller-C features Isoquercitrin, a clinically studied nutraceutical offering the benefits of quercetin with superior absorption and bioavailability, to help promote cellular antioxidant defenses.* Aller-C’s combination formula also includes Vitamin C for immune support, Citrus Bioflavonoids to help maintain capillary stability, and Bromelain to promote healthy inflammatory balance.* This supplement can be used for maintaining and supporting the proper levels of enzymes and physiological factors necessary for normal respiratory and sinus function during seasonal challenges.* Packaging and labels may vary.