Dietary Supplement. Contains no artificial colors, preservatives, or sweetners; no dairy, sugar, wheat, gluten, yeast, soy, corn, egg, fish, shellfish, salt, tree nuts, or GMOs. Isura: Non-GMO. Mass spec. Documentation. Lab tested. Bioflavonoid complex. Healthy immune support. Quercetin capsules are enhanced with citrus bioflavonoids, bromelain and rutin. Quercetin, a popular bioflavonoid, is essential to optimize the body's use of vitamin C. Bioflavonoids are brightly-colored substances that are found in fruits and vegetables, typically as companions to vitamin C. Bioflavonoids are essential for proper absorption of vitamin C and have been shown to have antioxidant properties, increase capillary strength and keep collagen healthy. Purity & potency guaranteed. Manufactured by Natural Factors to ensure safety and potency in accordance with Good Manufacturing Practices (GMP) of the FDA and Health Canada. Recyclable container and label. (This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.) Product of Canada.