Vitamin C is consumed in a supplemental form by millions of people across the world for its antioxidant properties, which are well-documented in medical research. C-1000 from NOW Foods provides a potent dosage of this key vitamin and is blended with rose hips, a natural source of vitamin C and a synergist. Now Foods uses globally sourced ingredients. Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.