Wow the post about potatoes for blood poisoning
! Luv to hear other things u grandma used. I know I have seen the fine skin of a white onion stop bleeding.
If you have a cut, putting a piece of onion skin, the transparent film, onto it will stop it from bleeding immediately. I got this tip from a magazine and tried it when I cut myself chopping vegetables. The onion instantly stopped the bleeding. The cut was no longer than 1 inch, and not seriously deep, just enough to gross one out.