Calcium Ascorbate is an optimal nutritional supplement that combines Ascorbic Acid (Vitamin C) with Calcium Carbonate.&ampnbsp;&ampnbsp;By combining these two dietary ingredients, we have created a buffered source of Vitamin C that will not contribute to gastric irritation in sensitive persons.From the FDA's website: &ampquot;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.&ampquot;