There's retinol, and then there's Intelligent Retinol. With supercharged retinol activity whilst remaining gentle on the skin, this performance-enhanced vitamin A serum is available in 3 strengths. After cleansing in the evening, massage 4 drops of retinol across the face, neck and decolletage. Follow with your regular Medik8 moisturiser. We recommend Advanced Night Restore, designed to be used after vitamin A. Retinol application should be phased in gradually. Use twice a week for the first 2 weeks, every other night for the next 2 weeks, then every night. Consult a doctor if breastfeeding or pregnant. You should always use a sunscreen in the morning while using vitamin A.