My current serum is the Kiehl’s original anti-aging Vitamin C serum, Powerful-Strength Line-Reducing Concentrate, now with 12.5% Vitamin C and Hyaluronic Acid. This particular product is formulated with Vitamin C, 10.5% L-Ascorbic Acid and 2% Ascorbyl Glucoside. It is an anti-aging serum with Hyaluronic Acid. It helps reduce the appearance of lines and wrinkles and... Continue Reading →