I'm curious about teeth whitening.

As someone who loves coffee and drinks it frequently... I'm very curious about teeth whitening.

Since staining is also a cause, reducing coffee intake is the right thing to do, but it's really difficult.

The whitening maintenance period is shorter than I expected~ If I keep drinking coffee, will it become even shorter?

How long will the whitening last if I drink more than two cups of coffee a day?

Would using a whitening toothpaste that is said to be good for whitening also help maintain the results?

Is it okay to undergo teeth whitening regularly without any issues?

I have so many questions, haha.