Vitamin C is a vitamin used to treat some skin conditions and wounds, scurvy (a disease caused by a deficiency of vitamin C, high blood preassure, male infertility, and is thought to help symptoms of the common cold. It is also used as an antioxidant to help protect against cancer and heart disease. Other names for Vitamin C include: Ascorbic Acid and Calcium Ascorbate. Before taking Vitamin C check with your doctor.