The other day my teenage daughter came bursting into the kitchen while I was making supper. She was obviously upset, and I wondered what crisis she was dealing with this time. Apparently she and her friends had been talking about their favorite female celebrities and comparing themselves to the ones they thought that they looked most like. One of her friends pointed out that my daughter had really yellow teeth and could never look like one of these celebrities. How crushing, even though the whole discussion was pretty silly. I promised my daughter that if she could find any product that offered whitening for teeth and was non-abrasive, I would let her try it. Off she went to do her online research.