Vitamin C primarily helps with 3 main purposes within skin care: improving Collagen Production, Antioxidant Protection and Brightening of the skin. Collagen is the main connective tissue in the skin. It is what makes the skin flexible. As we age, our bodies' ability to produce collagen declines, leading to an increase appearance of wrinkles and fine lines. The second is Antioxidant protection that helps protect the skin from environmental stress and free radical damage. The third primary purpose is to help with brightening the skin to help reduce the appearance of dark spots and improve skin tone.