I think a zapper is a valuable tool to have in your arsenal. I can tell when candida/fungus is increasing, itchy feet and other areas of my body. Zapping helps get it under control. You have to use a multi-pronged approach though. I have found the Bentonite clay/psyllium very helpful as well as food grade diatomaceous earth. Works like a magnet in the intestines to suck up and destroy all parasites/candida/yeast/fungas. Olive leaf is wonderful as well.