I can always tell when someone is using vitamin C; their skin just seems to have a glow about it. It is because vitamin C, also known as ascorbic acid, is key to the production of collagen; a protein that aids in the growth of cells and blood vessels. It helps your skin repair itself by giving it firmness, strength and protection. A great “go to” for fabulous skin is to compliment a tretinoin or retinoid product with a vitamin C serum- it keeps a nice luminous glow to your co