Zappers are way necessary...

I can only say, as long as parasites are involved anywhere outside your intestinal tract, you need to zap. Nothing but the horrid life threatening drugs of the pharmaceutical cartel will kill them out there.

A zapper will, easily I've found (my symptoms went away is how I know, not some bogus 'I saw them' which you won't if they aren't in your digestive tract).

But not only does the cleanses drive the parasites out of your intestines, those parasites will keep coming back in again if or until you do another cleanse without the zapper killing them everywhere else.

My observation is that parazapper,a user here has a number of good models with different prices. I haven't had the pleasure of using his, but his theory seems sound and he is extremely knowledgeable. And seems to offer top drawer customer service. I've had many, and believe me, that isn't the norm, from my experience

But there are other sources of course--do a search on zappers or Dr. Hulda Clark and you should get a variety of them.