If I use peroxide and baking soda as a toothpaste, how long will it take until i notice whiter teeth?

Has anyone ever done this and seen positive results? I want the best remedy to whiten my teeth a bit. Your answers are appreciated.
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This will work, you could do the baking soda alone. But, don;t do it on a regular bases, not good for the ename. There are products on the market also to whiten teeth. Oh, You should see a difference with the baking soda right away.
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