Information Reviews Ask Dr. Dan Product Description U.S Enzymes Isoquercertin supports immune health, metabolic function, cellular health, and exercise performance and recovery. Recommended Use: Take 2 capsules daily. Can be taken with or without food anytime of day. Label Information Dairy Free Gluten Free Soy Free Vegetarian Vegan U.S Enzymes Isoquercertin Facts: 1 capsule contains: SunActive IsoQ (provides equivalent 2000 mg of quercetin) 728 mg Vitamin C (as ascorbic acid) 540 mg Other Ingredients: cyclodestrin, rhamnose, capsule (vegetable cellulose).