Vitamin C, also known as ascorbic acid, is a water-soluble vitamin . Unlike most mammals, humans don't have the ability to make their own vitamin C. We must therefore obtain vitamin C through our diet.

Vitamin C comes in many forms, with ascorbic acid being the most common. Other forms of vitamin C include magnesium ascorbyl phosphate, L-ascorbic acid, tetrahexyldecyl ascorbate, ascorbyl palmitate, ascorbyl glucosamine, sodium ascorbyl phosphate, ascorbyl glucoside, and ascorbyl tetraisopalmitate.