I was on a herbal parasite cleanse for about 7 weeks. Two weeks on, 5 days off, etc. I didn't think there were any parasites left, certainly hadn't seen any in three weeks, but wanted to make sure so made a zapper. I passed some dead worms today so I am saying yes it works. I actually felt it tingling in a area where I have a bartholense (sp?) cyst while I was using it. I noticed that it's not so inflamed the next day. I have had this cyst for 5 years and since the only permanent treatment for this is surgery I now have a vague hope that maybe this might actually be killing something and allow my body to heal itself. It wasn't why I purchased it but it would be a nice dividend.
I think the best method is a combination of herbs and zapper.