Unfortunately, neither of those are going to work very well. Rubbing penicillin mold onto a wound might treat surface bacteria, but won’t help much if the bacteria has already spread into the bloodstream. “Natural penicillin” derived directly from mold is very sensitive to stomach acid. If you drink it as penicillin tea, it will be destroyed before it makes it to your bloodstream. The only way to make this penicillin works it to inject it (not recommended!). To get the benefits of penicillin fro