Vitamin C, or ascorbic acid is needed for a healthy immune system, healthy bones, teeth and gums as well as helping to maintain normal blood fat and cholesterol levels. In addition to being an antioxidant in its own right, vitamin C facilitates the body in recycling other antioxidants. Vitamin C, being one of the fragile water soluble nutrients, is highly unstable and easily destroyed by heat and light, and it is not always possible to be sure how much is taken in the diet. Our daily requirement for it is higher than for any other water soluble vitamin. However due to its acidity, vitamin C may cause slight gastric upset in those with very sensitive stomachs. This product provides vitamin C in the form of calcium ascorbate, a non-acidic compound that is believed to be gentler on the stomach. Up to 2g of vitamin C can be taken using this product (4 tablets), and if this amount is being consumed we recommend that the tablets are taken spread out through the day. Each tablet also provides over 70mg of calcium, which can make a valuable contribution to an individual's calcium intake, particularly if they are taking several tablets per day.