What It Is: Vitamin C Serum, clinically-demonstrated to boost skin's radiant look whilst visibly reducing the appearance of lines and wrinkles. Pores look diminished, skin feels firmer. Now formulated with even more antioxidant Vitamin C, Dermatologist Solutions Powerful-Strength Line-Reducing Concentrate incorporates 10.5% L-Ascorbic Acid and 2% Ascorbyl Glucoside. In addition to Vitamin C, this anti-ageing serum now includes Hyaluronic Acid to help skin retain moisture. What It's Good For: Skin feels smoother and looks radiant. The formula penetrates into skin's surface layers, helping to reduce the appearance of lines and wrinkles. Formulated for all skin types, including sensitive skin. Our clinical test results prove the formula's efficacy and customers agree. Key Ingredients: VITAMIN Cg (Vitamin C derivative that activates once absorbed), FRAGMENTED HYALURONIC ACID (holds up to 1,000 times its weight in water), GLYCERIN (helps skin retain moisture & soften skin).