Our recommendation? For best results, use morning and evening (or mornings only if you′re using Retinol at night). Apply 1-2 drops directly to skin after your moisturizer, as the last step of your routine. Alternatively, blend a couple of drops with your moisturizer, serum or face oil. If your skin is on the extra sensitive side, start with 1 drop blended into your skincare product of choice. Gradually build up to using the full amount or applying neat as your skin becomes stronger.