from what I have read no company can give thorough tests for parasites. I would save your money and clean up yourself to get well, that is if you are sick. I done parasite cleanses and felt awful doing them though lots of creepies came out in the stool. I stopped the remedies and adopted more alkaline diet as suggested in the Moreless forum, and still more worms came out. They've stopped coming now and hey my constipation has gone. Have a look at this and see what u think!