Cosmedix’s BrillianCy Vitamin C Brightening Face Oil is a great find. The directions advise you to use it as you would a serum or moisturizer, ie. put on dry skin after cleansing. I use this as I use all my oils, as a last step for major hydration and to lock in my serum and moisturizer. I do this only at night. It is designed to be used both day and night, but I think it is too heavy for day time. It smells great. A little goes a long way, you do not need a full dropper’s worth. I used the excess on my hands before bed and could feel the added smoothness in the morning. I have combination skin. I think this is best for combination or dry skin. So get your vitamin C, in an oil, how brilliant of you…