How to whiten my teeth at home or with stuff to get at the rite-aid?

i have these very yellow teeht! i don't know why ethier. But i really want to find a way to make them really white in just a few days. i heard something about strawberries and something else? i really need to get them, white
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i have yellow teeth too. some parts of my teeth are starting to whiten. I would recommend Crest White Strips premium. someone recommend to me.
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