Vitamin C, also known as L-ascorbic acid, is a water-soluble vitamin that is naturally present in some foods, added to others, and available as a dietary supplement. Humans, unlike most animals, are unable to synthesize vitamin C endogenously, so it is an essential dietary component. Vitamin C is required for the biosynthesis of collagen and certain neurotransmitters. Collagen is an essential component of connective tissue- a structural component of cartilage, ligament, tendons, blood vessels, and skin. Sunshine Nutrition Vitamin C Tablets in the form of ascorbic acid functions as a powerful antioxidant which supports the scavenging of free radicals in the body. It is also an important component to maintain a healthy immune system and is used most often for preventing and treating the common cold.