Apply daily morning and evening onto clean skin. Wait for 15 and then apply the day or night cream. This serum has an anti-ageing revitalizing effect. Applying a few drops to the face and neck will result in skin immediately feeling softer and smoother. The formularsquos active ingredients provide the skin cells with oxygen increasing the skinrsquos elasticity and reducing the appearance of wrinkles. They also enhance the effects of the day or night cream. Dermatologically tested.