Beta-glucan plus quercetin designed to offer synergistic immune support.* Quercetin is a powerful antioxidant bioflavonoid, and beta-glucan, a soluble dietary fiber.* Combined effects may be especially helpful in regulating the immune response during environmental exposures.* Hypoallergenic* product free of the following common allergens: milk/casein, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, soybeans, and corn. Contains no artificial colors, flavors, or preservatives. Trusted by healthcare practitioners since 1969, Klaire Labs products are developed closely with physicians and are intended to be used as directed by a healthcare practitioner.*