Humaworm killed tons of bugs for me but no way got rid of them all. I had to keep killing them for 2 more months using a Black-Walnut & Wormwood tincture from Vitacost & Colloidal Silver . Those were effective, for all I know as effective as Humaworm, hard to say. I also used cayenne pepper, did the Blessed Herbs cleanse & sometimes would do a psyllium & Bentonite cleanse. Did tons of enemas.