I've been reading the forum and I've read Hulda Clark book, it seems to me the The Zapper for $10 is an exact copy of what Hulda Clark was/is using. So if it's effective, why pay more? The other thing that bugs me (forgive the pun), is why Hulda Clark proposes that we buy the Herbs too. If a small electrical current kills parasites, why bother with hebs. If herbs kill the parasites, why bother with a Zapper?