I was given Skinceuticals from a friend three years ago whwen she had too much skin stuff at her house and was cleaning out her cabinets to make room for more goodies. She told me to try the Skinceutical line for my over 40 face and fine lines and forehead. I have dry skin and had the 'angry look' lines between my eyes (right above my nose-you know which lines I mean!) I tried every cream you could imagine over the counter, but nothing worked.I used the Serum 15 every day on clean dry skin like the directions say. You only need a few drops. At first I noticed almost a stinging sensation, but… read full review »