Also, it's really good for healing oral piercings.

..but damn it's pricey. It was almost $9 for what I usually pay around $3 for. Although, it says to just swish with a tablespoon - so you use less. Like the concentrated laundry detergent for your mouth. So maybe it's near price. I sometimes water mine down to make it swish easier, too. A shotglass helps with that. It's pretty good stuff and doesn't taste super bad.
What did it do to your teeth?