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蝕性，會更快地磨損你的牙釉質。如果您有蛀牙問題，應該避免使用。
YSK："美白 "牙膏通常比普通牙膏更具磨蝕性，會更快地磨損你的牙釉質。如果您有蛀牙問題，應該避免使用。
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