What it is: An innovative serum powered by the new gold standard in vitamin C, THD ascorbate.What it does: The stabilized, nonirritating vitamin C penetrates skin 50x more effectively than traditional ascorbic acid. The most advanced brightening ingredients plus the brand's signature Bio-Renewal Peptide significantly enhance radiance, refine skin texture and improve signs of aging. The serum is clinically proven to help visibly reduce fine lines and wrinkles, improve skin brightness, visibly red