I would say even more here. Even some natural ways are quite effective. For instance, buy vitamin and mineral complexes and dietary supplements at the pharmacy. You can also buy light guide for philips zoom teeth whitening https://bleach-infiniter.com/lifetime-zoom-dental/. This whitening procedure is comfortable - the light intensity is adjustable, so the whitening is painless. I like it a lot by the way
Recently I have come across SmiloShine Teeth Whitening Strips with Activated Charcoal. So far, it is the best teeth whitening product I have used so far. Also, it is very economic to the pockets. It is only $10 - $11 range and easily available on Amazon India.