We tested over 20 brands and found the best teeth whitening pens to brighten your smile gradually and gently. Jaylyn Pruitt has been working with Dotdash Meredith since May 2019 and is currently a ...

Depending on how strong the formula is, teeth-whitening products may take anywhere from 24 hours to one month to see dramatic results. Some manufacturers are clearer than others in terms of disclosing ...