Skinny on Coffee

Have you heard of this before? I think its may be regarding the fat and skinny of the coffee. The skinny on coffee I am obssed with coffee lately and I drank so much that my teeth is very brownish.

It doesn't looked beautiful at all and I am thinking about whitening teeth. Do you have any recommendation? If yes, please tell me about it.

Will toothpaste worked? What's the brand which you are using now?

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