Ultra C Firming ConcentrateAn award finalist and clinically proven to visibly brighten and refine skin texture, this is our highest strength vitamin C formulation, expertly developed to support a firmer, more radiant complexion*. This sophisticated formula pairs pure vitamin C (L ascorbic acid) with an advanced delivery system, complemented by the potent peptides Microelastin and microcollagen, and antioxidant actives, to promote smoother, more youthful looking skin. American