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There are home remedies that are touted to whiten teeth. Some people think that brushing with lemon juice will work, but it is an acid and can damage enamel and cause cavities. Not a good idea. Brushing with wood ash that’s left over from the fireplace is another home remedy, but it’s basically lye (used way back when to make soap), is very harsh, and will damage teeth over time. How about using baking soda? Baking soda is an abrasive and can wear your enamel away. It will clean your teeth pretty well, but it will not whiten them. So, is there a best teeth whitening home remedy? I don’t think so.