does using salt-based tooth powder scratch your teeth?
I have soft enamel and I am looking for a natural tooth powder that, at the very least, won't further damage my enamel. Most tooth powder recipes I've seen use sea salt as an abrasive. I've also heard from dentists that salt is too abrasive and will scratch your teeth microscopically. Is this true? Could I grind the salt finely before using or would that defeat the whole purpose?