Few people have white teeth naturally. Not to mention, they change color over the years from various factors, like the foods you eat. Tooth discoloration is a leading concern among adults. If you’re among those who are embarrassed by stains, you’ve probably tried a few OTC teeth whitening products. Although they are widely available at many leading retailers, there’s a lot of misinformation that can put your smile at risk. Contrary to what you might have heard, here are 4 facts behind common at-home teeth whitening myths.