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. C-500 provides a potent dosage of this key vitamin and is blended with Acerola, a natural source of Vitamin C. Citrus Bioflavonoids are added for their synergistic effect. From the FDA's website: "Some scientific evidence suggests that consumption of antioxidant vitamins may reduce the risk of certain forms of cancer. However, FDA has determined that this evidence is limited and not conclusive."