PROFESSIONAL GRADE: Unlike any other Vitamin C serum Cosmedica's 79% Power Serum? contains 79% Pure Vitamin C (L Ascorbic Acid)- Best Vitamin C Serum for Sensitive Skin with No Preservatives. See instant results with this powerful and effective 7-day boost; then continue to maintain radiant results with 20% vitamin c serum. For recommended use- every 3 months or as often as necessary for an intensive boost in skin care routine.</br>Vitamin C has long been known as one of the top antioxidants for neutralizing free radicals to protect and brighten dull aging skin. Boosts Collagen Levels. A treatment to soften fine lines and wrinkles due to aging and sun damage.</br>ALL SKIN TYPES: Sensitive acne prone and aging skin can benefit from this 79% Vitamin C Power Serum</br>Boosting collagen levels builds support under the skin making it appear more even radiant firmer and younger looking.</br>Freshest Vitamin C Available- Instant activation formula ensures stable vitamin c and the freshest application to skin.</br></br>Product Description</br></br><b>Cosmedica Skincare 79% Vitamin C Power Serum Delivers Deep with an Ideal 3.5 PH and Zero Preservatives?? The Most Powerful and Effective Vita