by Shyema Azam, Allure Magazine Associate Research Editor

Luster Pro Light Dental Whitening System (shop.lusterpremiumwhite.com)

"I used this system—which involves a pretreatment rinse, whitening serum, and light—for five rounds. You're supposed to hold the light up to your teeth for two minutes after applying the serum, but it was actually light enough to rest comfortably in my mouth, so I left it in place while I did other things around the house. I thought my teeth were already pretty white, but this definitely took them up a notch.

The best part: There was zero sensitivity, even after multiple uses in one sitting. You do have to be careful about your saliva pooling, though. The packaging suggests placing cotton by your gums to address that, which I tried, but it was less comfortable than just dealing with it. Other than that, it was supereasy and superquick, and I would definitely recommend it." —Shyema Azam, associate research editor