NOW Foods Supplements, Vitamin C-1000 Complex with 250 mg of Bioflavonoids, Buffered, Antioxidant Protection*, 180 Tablets is a highly effective antioxidant that helps maintain healthy tissues by neutralizing free radicals generated during normal metabolism and exposure to environmental stressors. It supplies calcium ascorbate, a buffered form of vitamin C that is bioavailable and non-acidic, and is enhanced with bioflavonoids, which work synergistically with vitamin C. This product is soy-free, non-GMO, vegan/vegetarian, nut-free, made without gluten, dairy-free, egg-free, kosher, and low sodium. It is packaged in the USA by a family-owned and operated company since 1968.