I want to get rid of my parasites especially the Giardia. But my GI tract is very sensitive and seems irritated. Any little thing makes me "D". What is this zapper thing? Electrocuting the bod? Cant you have a heart attack if you have a bad heart? I need some good advice here as to what approach to take. I will NOT stay married to my house and flush my system every day. I know this takes time, but I need to fix before I go on vacation. Need some good advice. Thank you all in advance.