Pre Essence C utilizes "ascorbate glycerin" as its primary active ingredient in order to reduce negative effects from environmental stressors. As a dermatological clinic, Ishii has carefully selected 11 types of plant extracts that provide a smooth complexion. The beauty solution in its essence is mildly acidic, so it won't irritate the skin. Inositol helps the skin maintain nutrients and keeps skin healthy, while Pre Essence C acts as a hydrating serum that can be used before moisturizer.