VITAMIN C 40% HIGH POTENCY SERUM IN 5% RETINOIC ACID MEDIUM 60ML. THIS IS YOUR REGIMEN OF CHOICE IF WHEN YOU NEED HIGHER CONCENTRATION OF VITAMIN C WITH TOUCH OF RETINOIC ACID FOR WRINKLES & ACNE BREAKOUTS. THIS PRODUCT WILL DEPIGMENT THE SKIN, DO NOT CHOOSE IF SKIN CLARITY IS NOT YOUR GOAL