Paula's Choice C15 Super Boost is a brightening face serum for all skin types. The new formulation of C15 Super Booster delivers the benefits of 15 percent pure vitamin C with a reduced likelihood of irritation, thanks to new technologies that combat dull, uneven skin, giving you brighter, healthier-looking skin. Key ingredients include Ergothioneine, a powerful antioxidant that evens out uneven complexions and boosts the effectiveness of vitamin C for enhanced results. Tridecapeptide-1, a clinically proven encapsulated polypeptide, reduces lines and wrinkles in critical areas such as the eyes, mouth, and forehead in as little as 15 minutes, with significant improvement in skin smoothness and reduction in wrinkle volume after 4 weeks of daily use. Finally, Palmitoyl tripeptide-5 is an anti-aging peptide that works by penetrating the skin to disrupt communication between nerves and muscles, thus preventing the formation of new lines and wrinkles, and sending signals to the deeper layers of the skin to promote natural cellular repair.