well, ionization is the medium for carrying electro.
But that is very little and copper is good.
there is a video using silver electrodes in the electric medicine forume.
I am trying to understand also the ray beam that carries, what light, into the body but I think it is the electromagnetic, still, there that which really generate a current in the body.
the idea may be was to stun and to slow the resistance growing very fast against the antimicrobial biochemistry in the plant/herb/s.
Clark, used herbs together with zapping...
A healer had me zapped and he called it silica and told to use the herbs after a week - but I did not take herbs, I was too scared. I think that was a one zapping.