If you find that your skin is intolerant of retinols, or you are just scared of the dryness that is associated with retinol (typically dryness occurs when you are new to retinols and subsides with continual use), then this serum is an excellent way to get the benefits of Vitamin A with minimal residual dryness as the amount of Vitamin A is much smaller than what you’ll find in intensive clarity treatment and intensive age refining treatment (both serums house 0.5% pure retinol). A&C Synergy Serum is also a great twofer for those of us who like a really simple skin care regimen. L-Ascorbic Acid (Vit. C) is an antioxidant and melanogenisis inhibitor, minimizes the appearance of fine lines and wrinkles while promoting even skin tone. In addition, this powerhouse has antioxidant Resveratrol; Alpha-arbutin, Kojic Acid, Lactic Acid & Licorice Root Extract to even skin tone and exfoliate impacted skin and pores.