Vitamin C, ascorbic acid, is taken by individuals with a low amount of vitamin C in their diet or those trying to prevent low levels of Vitamin C. People often increase the Vitamin C in their diet to boost immunity and ward off the common cold. Those contending with a Vitamin C deficiency may develop scurvy. Vitamin C is an antioxidant that maintains bones, teeth, skin, and even blood vessels. Vitamin C syrup is great for people who want to increase their vitamin C intake, but do not like to swallow pills or vitamins.