YSK: "Whitening" toothpaste is usually more abrasive than regular toothpaste and will wear down your enamel faster. You should avoid it if you have tooth decay problems.
from /r/YouShouldKnow
YSK："美白 "牙膏通常比普通牙膏更具磨蚀性，会更快地磨损你的牙釉质。如果您有蛀牙问题，应该避免使用。
YSK："美白 "牙膏通常比普通牙膏更具磨蚀性，会更快地磨损你的牙釉质。如果您有蛀牙问题，应该避免使用。
YSK: "Whitening" toothpaste is usually more abrasive than regular toothpaste and will wear down your enamel faster. You should avoid it if you have tooth decay problems.
from /r/YouShouldKnow