I've just started using an eye product that contains caffeine. The claims are that it reduces puffiness (and it's in lotions to minimize the look of cellulite too). I *think* I can see a difference, but it might be wishful thinking. Certainly no one has said anything (what would they say? Wow Bub! Generally you look to be 200 years old, but today you only look like you're oh, say, 150?!)