These are natural highly performing active cosmetics which deliver a long lasting result. They are pure, highly concentrated and remedial. Only 3 or 4 drops are sufficient for the direct application for entire face, the serums can be applied on their own or under a cream N3. These are 100 % organic products with superior quality pure essential oils. Do not use other cosmetic product that might provoke allergies, contain retinol or acids before or after the application. Apply sunscreen if you are exposed to the sun for 12 hours after the serum application. We recommend a regular application before a night time.