Unfortunately this is something that varies from person to person. There is no one-size-fits-all approach to whitening. Furthermore, issues that come along with whitening (such as sensitivity) vary quite a lot as well. There are a few things you can do to make sure you’re whitening safely though. First off, it is highly unlikely that use of whitening strips will actually damage your teeth permanently. The two major concerns are gum blanching and tooth sensitivity. Both of these are temporary issues (unless something very extreme happens). Your teeth themselves won’t get damaged, weakened or harmed in any way. To combat sensitivity, I suggest a sensitivity focused product like Sensodyne Pronamel. Given that you’re whitening with strips (or potentially an at-home kit) you’re free to use whatever toothpaste you like. You can also take a slightly more robust route and use a remineralization gel. This is the most powerful way to combat sensitivity, but often time can really just be overkill. Gum blanching is the result of hydrogen peroxide being applied to gum tissue.
That’s the nice thing about strips as opposed to gels – it’s pretty hard to get any overlap on your gums. Other than that, there’s not too much to be worried about. There’s nothing wrong with proceeding slowly though. People seem to get in a tizzy about whitening their teeth and want results in days – that won’t happen and if you try to make it happen, that’s where you’ll run into issues. Just be patient and know that you’ll likely see results over several weeks up to 2–3 months as opposed to day. If you want to learn more about Crest 3D whitening strips, check out the full guide I put together here. And of course, let me know if you’ve got any questions!