Retired hairdresser [SEP] Because of my training I have some knowledge of skin care and this is the best antioxidant treatment serum I have found. It leaves my soon-to-be-50 skin looking great. The ingrdients are exactly the same and in the same amounts as the other spa product but this one costs less than half! It is a light weight, fast asorbing serum with no fragrence to irritate sensitive skin. I use it before applying the hydrating gel. Can be used alone or worn under make up. Make-up application simply glides on almost like using a primer. I use this (along with the hydrating gel) twice a day, in the morning after my shower while my pores are still open and before bed after washing my face with a gentle non-soap cleanser. The only additional product I need is a good facial moisturizer with sunscreen under my make-up. Do yourself a favor and try this if you are looking for a great anti aging skin care treatment to reverse old damage AND to prevent new damage.