Now Foods Chewable C-500 provides a potent dosage of this key vitamin and is blended with acerola, a natural source of Vitamin C. Vitamin C is perhaps the most popular vitamin known to man. It is consumed in a supplemental form by millions of people across the world for its antioxidant properties. Citrus bioflavonoids are added for their synergistic effect. Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.