Ampoule Anti-ox Serum Vitamin CVitamin C, a great classic which is not so easy to formulate! In its pure state it is unstable over time, in other words it loses its properties and is no longer effective. Youll see, its noticeable because it turns brown. So how can its effectiveness be maximized? SVR selected an optimized form. 20% of this optimized Vitamin C is equivalent to 17% of pure Vitamin C. Its structure is similar to Vitamin C and offers the same properties as pure Vitamin