Well I didn't say it was fool proof. [ It could be convenient though?But it's true that it would be bad to mistakenly strain it further. She pulls a chair in the room a little closer to the bed.]
Anyway... my blood has healing properties. It's regenerative. It's why I'm immortal and can't die. Humans back home sometimes hunt the pureblood because of those miracle properties. You'd heal quickly and be stronger. But it could have a few side effects.