Duration of teeth whitening effects

Teeth whitening always seems to be a concern.

How long does the whitening treatment last?

Actually, I would like to try it if it can last for a long time.

I'm worried that if I eat coffee or food again, it will stain quickly.

Does continuous maintenance after whitening make the results last longer?

I also want to have white, healthy teeth like celebrities ㅠㅠ

Home care or basic management isn't easy, you know. 😢