I like to think of serums as vitamins for the face — like magical potions that help make the skin glow. Recently, an anonymous reader tried Caudalie Vinoperfect Serum ($79), and was none too pleased with the sticky and shiny results. Take it away, mystery reviewer:

"Apparently people swear by this, but after a week using it, I saw absolutely no difference other than the fact that it left my skin a bit sticky and shiny, even underneath my moisturizer. I will say that my skin felt tighter — which for me, with dry skin, was a negative, but might be a plus for others. I can't see how it's worth the price."

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