You have to get the food grade online and it is pure and has no other clays in it, which potentially could contain heavy metals. I would only use pure food grade for this reason. I get a 10 pound bag at earthworkshealth.com for $14 so you're not really breaking the bank for the good stuff.

DE clears the gut parasites and kills any incoming parasites. parasites of the organs and tissues like human liver flukes and trichinosis are rare - the most common parasite from raw meat is tapeworms, which DE readily clears. The most common carrier of tapeworms, roundworms, and the like is your cuddly family pet.

I worm my kid by sneaking DE in yogurt, and my dog by mixing it in pretty much anything. I also use the food grade to mix in the chicken food. I tried to dust my hens but they weren't very appreciative and bit me for the insult.

It also kills fleas, ants, and other pests. I just sprinkled some in my shed and flower beds to eradicate the fleas popping up out of the dirt from the mild winter we got (this takes a few days, it's not instant but it IS nontoxic).

It's worth mentioning again that I only eat raw meat from 100% grass fed organic animals, and only raw eggs or sunny side up from my own backyard chickens. Nothing that's been in a stockyard even if it says organic on the label. I do not eat any raw freshwater fish, farmed fish, or wild game like deer. I no longer eat raw oysters due to the polluted waters.