10 of 14 people found the following review helpful
Only a couple of hours!,
Verified Purchase(What's this?)
This is really only temporary! In the commercials it makes you think it whitens as you brush. Well it has a blue hue so it just stains the teeth. Only for about 2-3 hours.if you are having photos taken then I would say use it right before other wise use the real teeth whitening from your dentist.