Vitamin C is an antioxidant. What that means is, it neutralizes free radicals. Free radicals are formed from our skin’s interaction with pollution, sunlight, etc. Free radicals damage the collagen in our skin, as well as our skin’s DNA. Antioxidants help to neutralize this oxidative damage, and Vitamin C is amongst the strongest. However, ascorbic acid is also a very unstable compound. Formulation is key when it comes to creating a product that has an active, long lasting form of Vitamin C.