Product Details Now formulated with even more vitamin C Dermatologist SolutionsPowerful-Strength Line-Reducing Concentrate from Kiehls incorporates 10.5% L-Ascorbic Acid and 2% Ascorbyl Glucoside. In addition to 12.5% vitamin C this anti-ageing serum now includes hyaluronic acid. The formula helps reduce the appearance of lines and wrinkles while helping to improve the feel of skins texture. Skin looks radiant and feels smoother. This vitamin C serum is carefully formulated to provide clinically proven results in a concentration gentle enough for sensitive skin. How To Use Cleanse skin thoroughly prior to application. Apply over entire face twice morning and night (avoiding the eye area). In case of contact with eyes rinse them immediately. As the formula blends into the skin you may experience a feeling of warmth. Full Ingredients Propylene Glycol Dimethicone Glycerin Ascorbic Acid Ethylhexyl Palmitate Cetyl PEG/PPG-10/1 Dimethicone Dimethicone Crosspolymer Ascorbyl Glucoside Cyclo