You probably heard or read that piece of info from somewhere else yourself, and your brain most likely thought that made perfect sense....
and it does. The problem with that statement however,
is that
it omits an important factor from the actual equation.
Biological Epinephrine is obviously not removed from a live human being during some rush of Adrenalin moment they were having, so that the medical community can store it, then use it on someone else later that needs it. No.