Vita-Peptide C-Quence Serum 1Vita Peptide C Quence Serum 1 The Vita Peptide C Quence Serum 1 is the first level in the Vitamin STEP UP SYSTEM and contains the lowest concentration of vitamins A, C, and E as well as antioxidants and peptides. These ingredients work in synergy to help maintain a smoother looking and more radiant, youthful appearance. Key Ingredients: Retinyl Propionate (vitamin A) Ascorbyl Tetraisopalmitate (vitamin C) Tocopheryl Acetate (vitamin E) Palmitoyl