Hydrogen peroxide, the active ingredient in over-the-counter whitening strips, may be harmful to the layer under the enamel of teeth, according to research presented Tuesday at a scientific meeting.
원문출처 : https://www.cnn.com/2019/04/09/health/whitening-strips-study/index.html
원문출처 : https://www.cnn.com/2019/04/09/health/whitening-strips-study/index.html