Quercetin is a bioflavonoid that is often found in nature with vitamin C. Bioflavonoids are antioxidant nutrients. Each vegan friendly capsule provides 500mg of quercetin making this a ideal supplement to add to a supplement regime that requires the addition of a bioflavonoid. Note: This product is not intended to diagnose, treat, cure, or prevent any disease, nor should supplements be used as a substitute for a balanced diet. Not intended for pregnant/breastfeeding mothers or children under 18. Do not exceed the recommended dose.