What is the best way to whiten teeth?

Depends: It depends on many factors- level of color you're trying to reach, the thickness of your enamel, sensitivity of your mouth, any pre-existincavities/oral issues (crowns/veneers/bonding). Generally, if your mouth is healthy and you see your dentist regularly, either in office or otc whitening strips/trays. I prefer an in office visit and trays for maintenance it's best to see your dentist.

OTC WHITENERS: Otc whiteners work but your dentist can provide you with stronger material. They are all perioxide based gels some with Fluoride to decrease sensitivity which is the usual side effect.

Zoom: Of all the whitening treatments the zoom uv bleaching system does the best job of whitening. Unfortunately it also causes the greatest amount of tooth sensitivity.

It depends: At home you can use whitening trays in the office you can use laser whitening such as zoom.

Best option: Best to see your Dentist. OTC products not very effective. Have your Dentist whiten them and help you maintain their whiteness. Know that any whitening treatment will have to be redone in time.