Over
time, it’s natural for our teeth to dull a bit as we get older.
After all, tooth enamel is porous, which means that it absorbs all
the colors found in dark foods and drinks such as red wine, coffee
and tea, berries, and tomato sauce. These foods and drinks can
contribute to a yellow or stained smile. While brushing and flossing
can certainly prevent these stains from forming in the first place,
once they are there, teeth whitening can help to break up these stain
molecules in ways that your whitening toothpaste can’t.