Morning/Evening, according to recommendation and skin type. After cleansing with suitable cleansing products, apply a small amount to the area and pat in. Then apply a cream suitable for your skin type from Dr. Spiller on top, recommendation Vitamin A cream. This product should be used for at least 4 weeks for best results, then pause for 2 weeks. It is recommended to repeat the process 2-4 times a year. This product is not recommended during summer months as AHA can make the skin more photosensitive. Always apply your Dr. Spiller sunscreen on top.