Concentrated facial serum with amino acids from plant collagen for intensive rejuvenation, firming and wrinkle smoothing. Plant collagen in the Collistar Attivi Puri Collagen+Glycogen facial serum is combined with glycogen, which acts as a source of energy, supports fibroblast metabolism and accelerates collagen production. The skin looks smoother and firmer after just a few initial applications. With regular, long-term use, the skin becomes even firmer, more elastic, stronger and more resilient.