Sure, we may all zap because we BELIEVE it will help us. Yeah, I get many of the same sensations that others get when zapping, burning eyes, throat, etc. How do I know that isn't just some phenomena of the DC voltage creating some small battery effect in the salty solution in the eyes or throat?
How do we REALLY know that it works. I don't see any dead bugs falling out of my skin. I don't see long stringy flukes dropping out of me.
The double-blind tests are the only way to eliminate the placebo effect and know if statistically, this zapping really works.