Harnessing the highest concentration of Dr. Perricone’s proprietary Vitamin C Ester, this night treatment promotes the look of brighter, firmer and smoother skin unveiling a visibly glowing, radiant complexion.Harnessing the highest concentration of Dr. Perricone’s proprietary Vitamin C Ester at 15%, this revolutionary night treatment promotes the look of brighter, firmer and smoother skin unveiling a visibly glowing, radiant complexion.