Liquid asset. Our most concentrated antioxidant treatment yet utilizes vitamin C to strengthen skin by boosting its natural defenses. Research shows that antioxidants, such as vitamin C, are perhaps the most effective ingredients in minimizing the visible signs of age. Vitamin C Essence has excellent penetrating power and is packaged in a special drop tube to help you target the areas that need it most and minimize waste. Use it any time to help protect skin against the destructive elements that cause visible aging.