A gel serum that instantly firms lifts and plumps the skin to leave it looking dramatically smoother tighter and more youthful a liquid matrix of hyaluronans supercharges the skin with firming moisture and encourages elastin synthesis to firm and remodel the skin over time about the brand since its launch in 2000 ren has become a cult favourite giving you ground breaking product formulation the latest hi tech actives rigorous product testing and clinically proven results ren uses only 1