However, [Ben Krasnow] stumbled upon a different method entirely when tinkering with a UV laser. The effect is ... to be the result of fluorescent whitening agents in the paper.

How about an option that’s under $10? We found a three-pack of teeth-whitening pens for only $9.99. These regularly retail for $19.99, but after clipping the 50% off on-page coupon, they’re on deep ...

A bright smile can light up a room, but keeping teeth white often takes a little extra effort —especially for coffee and red wine lovers. At-home whitening kits are effective, but many get a bad ...