Vita-Peptide C-Quence Serum 4 PlusThis serum is the fifth level and final step in our premium Vitamin STEP UP SYSTEM. It contains the highest concentration of Vitamin A in the form of Retinyl Palmitate and Retinyl Propionate as well as Vitamin C and E and peptides that help to support and maintain a radiantly youthful appearance. The combination of highly effective ingredients in this serum work together to help combat the visible signs of aging to create the appearance of an even,