hydrogen peroxide

[Doowai]

So how well does HP whiten your teeth?

I became a coffee drinker in my last year of medical school, and I am not sure how much it yellowed my teeth - but noticed my teeth are a bit yellow.

Also how much does something like zoom whitening tend to cost?

 

[aphistis]

1) Like OTC H2O2 solutions? Negligibly.

2) Several hundred dollars, depending on who does it for you.