From memory at least one of the hunter and gatherer groups that Price documented was American - Inuit. I don't have the book with me but here is a search that pulled it up:
https://www.google.com/search?q=west...D7Hm1mIv0TM%3A
But as you said, these were foods, not medicines, at least as far as I remember. I don't recall anything in the book about doing it intentionally to get straight teeth or preventing decay.