Understood about wanting hard evidence. Best for me was within 6 hours of my first zapping session I had a MONSTER amount of black, watery stool (sorry to be graphic.. but it is what it is) and saw HUNDREDS of flukes and other parasites in there. It was overwhelming as I turned around and witnessed that. The same day, more exited in numbers I wouldn't have believed.
I followed up with a Humaworm cleanse, which resulted in even more. While doing that I still zapped daily. I had a huge gout attack after all this which I'm sure was the result of dumping so much (I'm 55) accumulated parasites over a lifetime.
I didn't feel that bad before, but WOW do I feel better since!
I've had three other family members try the zapper and they reported the same dark runs and critters.
Plus, everyone in my family had a cold - not me, I zapped daily and it skipped over me. The rest were too stubborn to give it a try.
Scientific? Nope. Real? You bet. All I can say is that you do need to try it for yourself. I'm convinced enough so that if I could afford the more expensive zapper that lets you select frequencies for zapping certain viruses, bacteria and parasites I'd buy it in an instant and forever be rid of all - or at least able to contain them.
Good luck - keep sharing information - it's our greatest freedom and blessing!