As far as i understand yes, usually most whitening involves using abrasives. So if the concept of wearing your teeth away slowly seems fine then go ahead. I am not sure what effect other methods have on teeth but i can’t presume they aren’t without downsides. It’s likely that there is good information on that site though so i can’t snark too much but If i were to try to whiten my teeth i see a dentist and go from there.
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