Has anyone tried the Nutrabrite teeth whitener? I haven't seen any CREDIBLE reviews.?

Any teeth whiteners should be credible if they contain 10% carbamide peroxide or more.This substance has to be placed on teeth for almost an hour for aprox. a week with bleaching splints.If not,your saliva will wash it away.You may get 2-3 shades lighter and must continue treatment.If this is an in-office procedure one is as good as another.The difference could only be price.