I am 50yo and I have a drawer full of serums, lotions, and potions that do nothing but feel good or smell nice. This serum? This actually made a difference in my eyes. My dark circles are noticeably lighter and my upper lid has given back some of its previously usurped real estate. I just opened my second bottle. Each one lasts me 3 months. I only use two drops for both eyes, a little goes a long way.