what’s the safest and most effective way to whiten teeth without damaging the enamel? And is at-home whitening as effective as in-office treatments?"

1 hour ago, noor505077 said:

what’s the safest and most effective way to whiten teeth without damaging the enamel? And is at-home whitening as effective as in-office treatments?"

I have never heard that staining of teeth makes them fall out. You can get gum recession if you do not clean the margin where tooth and gum meet, especially between the teeth, but that is a different thing. I would consult a dentist if you feel your teeth are at risk of falling out. Staining and the argument for whitening are, so far as I am aware, a purely cosmetic issue.

1 hour ago, noor505077 said:

what’s the safest and most effective way to whiten teeth without damaging the enamel? And is at-home whitening as effective as in-office treatments?"

You could get custom fit whitening trays, which is highly effective and is offered in office.

21 hours ago, noor505077 said:

what’s the safest and most effective way to whiten teeth without damaging the enamel? And is at-home whitening as effective as in-office treatments?"

As per Exchemist see your hygienist/Dentist.

Things that can stain your teeth are things like coloured foods, tannins in tea, tobacco and wine. .