BazzSeca/ResistenteI used Vit C during the day and retinol at night. You can also use them alternately at night. Today retinol, tomorrow Vit C30UkaMSeca/Resistentethank you 00View 1 more repliesNeginSeca/ResistenteNo. Use them in different routines. Vitamin C in the morning and retinol at nights 30BlueNWhiteSeca/SensibleBest not to use together in the same routine! 30BGTNGrasa/Resistentenopeeee10DaveganpicksbymishaGrasa/SensibleNope dear..10123