Teeth whitening

Even when I was young, I didn't think my teeth were completely white.

It seems to be gradually turning yellower as I get older.

Moreover, since I drink coffee almost every day, about one or two cups, I think it affects tooth discoloration.

I've also tried whitening toothpaste, but I don't think it was very effective.

So, I am considering getting teeth whitening.

I want to know the costs and the pros and cons after the procedure.