Crest white strips are 35 percent off during Prime Big Deal Days. One PEOPLE shopping writer tried the Crest 3D Whitestrips, which have a “no-slip grip” and 68,000 five-star ratings on Amazon ...

Out of all the LED whitening kits we tested, the Crest Whitening Emulsion with LED Light impressed us the most.

I tried Crest 3D Whitestrips Professional Effects to see if they stand up to the hype. They're currently Amazon's bestselling teeth whitening treatment.

A PS editor tested the Crest 3D Whitestrips and saw significant whitening results in just days. See before and after photos here.

Why we love Crest Whitestrips teeth whitening strips for getting rid of wine stains, coffee stains, and cigarette stains. Currently discounted for Amazon's March Sale.

How We Tested the Crest 3D Whitestrips and Lumineux Teeth Whitening Strips We both tested our respective strips—Crest 3D and Lumineux—every day for a week, as directed.