I read an article many years ago, before internet, that a man had severe poison ivy allergy.
A Native American Indian friend of his gave him something to eat and told him it would cure him of his allergy.
It apparently worked.
He asked his friend what it was that he ate and his friend told him “Poison Ivy”...................
I just knew it!
I’m sure it was Cherokee :- )
Many years ago when I was maybe7 or 8 YO, I taggeed along with my dad to the woods on a rabbit hunt. Dad had the beagles running and we were standing by a tree that had vines on it. Common back in those days I broke off a twig of that vine and started chewing on it thinking nothing about it. After a while my dad asked what I was chewing and I showed him the vine. He said don’t do that, thats poison oak, spit it out. I did but to this day I have never gotten poison ivy rash.