There are plenty of products out there promising to make your teeth white . . . instead of their current delicious beige. But do they actually work? And do their effects last?
Here's how effective different teeth whitening products are and how long they last. And spoiler: No, none of them make your teeth whiter permanently.
A professional whitening by the dentist will last from six months to three years.
Using custom-fitted teeth whitening trays at home will last for about six months to a year.
Crest Whitestrips and other similar products last for about six months - after you use them for somewhere between 20 and 40 days.
And tooth whitening pens only work for a short time, like a touch-up before you get photos taken.