I think my wife may have found zapping helped. I'm not sure though. I know for sure she had parasites. But she is the type that doesn't like to do anything that tastes bad or make her feel bad, so that eliminates a lot of things you can do.
After a month or two of doing zapping every day, I got tired of it. And it did hurt the wrist area every time I did it, so I know that's why my wife didn't do it very much. We had one of the more original Helda Clark zappers.