GrenzCine - Serum is formulated to help increase the firmness of (thicken) our skin. This formulation, combining our renowned, patented Vitamin C sērum plus Polyamine-DAB, is a new patent pending discovery resulting from 30 years of clinical research. GrenzCine serum will increase firmness and hydration of the skin while providing the benefits of diminished fine lines and wrinkles, increased luminosity and improved skin tone, texture and elasticity.