If you hold toothapaste too long in your mouth could it really hurt you?!
Question: That's what I heard once.
Answers: That's what I heard once.
No. It wouldn't even hurt you if you ate it (unless it has fluorine, which wouldn't actually hurt you, either, but an excess of fluorine could blacken your tooth color).
i don't think so. i don't rinse after i brush, so i still have a little left. It hasn't done anything to me.
Possibly. ALL toothpastes are abraisive and will wear enamel away if used improperly.
no