Is it safe using hydrogen peroxide to whiten my teeth?

The safest bleaching: Is in a dental office. The dentist can evaluate what percentage you can take to prevent adverse reaction to the bleaching agent. He/she will check first any presence of gum disease, leaking fillings, cracks on the teeth, etc. That will need restoration. Hydrogen peroxide can slough off tissue too if improperly used.

Yes and no: If you are using a dentist supplied hydrogen or carbomide peroxide gel then it is safe, if used as directed. If you try hydrogen peroxide liquid solution from the grocery store, then no, it will not remain on your tooth long enough time to be effective, and you could irritate your gums and swallow it, irritating your throat.

Yes, by a dentist: Hydrogen peroxide is one type of professional whitening material that dentist use. It is very strong and should be applied by a dentist.