I was really curious to see if this lip gloss would work. Unfortunately, I didn't notice any difference. My teeth didn't seem any whiter or more "vibrant". I get that the blue tint in the gloss could offset the yellowness of teeth, but I don't think it's worth purchasing a $32 gloss just for a very slight, if any, improvement. I don't think I would recommend this - though I would recommend regular brushing, flossing, and Listerine! :P