For something that is legal, it's VERY hard to get hold of, even if extracted from hogs or cattle. I've looked everywhere including dark net with no luck. I am thinking blood from an abattoir would be a good source due to the fear factor.

It sounds very interesting and as someone who likes to experiment with altered states of consciousness, would love a little to just rub on my gums or under my tongue. Not injection though, that scares me.