This corn-free vitamin C and bioflavonoid blend contains 32% vitamin C sourced from natural acerola extract combined with the bioflavonoids quercetin, naringin and rutin for antioxidant support. Vitamin C is an important dietary antioxidant that supports the immune system, in part by maintaining healthy mast cell function and lymphocyte formation. The bioflavonoids quercetin, rutin and naringin are powerful free radical scavengers that complement the roles of vitamin C.