Generally, whitening usually lasts anywhere from 1 to 3 years. Sometimes whitening can last much longer in certain situations. If you consume a lot of food and drinks that stains considerably, then the whitening effect will not last as long.
Generally, whitening usually lasts anywhere from 1 to 3 years. Sometimes whitening can last much longer in certain situations. If you consume a lot of food and drinks that stains considerably, then the whitening effect will not last as long.