ANTI-WRINKLE CONCENTRATE, RENEWING RESURFACING: This anti-aging face and neck serum with pure retinol leaves skin feeling smoother, hydrated, and renewed. As a result, the look of lines, wrinkles and premature sun damage is reduced. This retinol serum combines concentrated pure retinol and vitamin B3 for optimal effectiveness while also being suitable for sensitive skin. How to Use Retinol B3 Pure Retinol Serum Application Fill dropper with serum and apply 3-4 drops in the evening on face and neck Apply after cleansing. Use retinol serum before applying a moisturizer. Always apply sunscreen the day following use. Pure retinol can react on contact with the air, turning yellow. This does not impair its tolerance or efficacy. Recommended for: Wrinkles, fines lines Premature sun damage Sensitive Skin.