Ester-C is a unique form of Vitamin C containing naturally occuring metabolites. Its patented manufacturing process neutralizes the pH, making Ester-C gentle on the digestive system. This product also contains a citrus bioflavonoid complex. Vitamin C is involved in biochemical processes such as hydroxylation of proline and lysine utilized in the formation of collagen and healthy connective tissue. Ascorbate is involved in many other vital functions such as the mobilization of iron, stimulation of immune system and as an anti-oxidant for scavenging of reactive free radicals.