All diatomaceous earth is not the same. (Never use pool grade diatomaceous earth – it is poisonous to animals and humans). DNA Detox Capsules contain Pure Food Grade Diatomaceous Earth which comes from an extremely pure fresh water deposit of the diatom Melorsira Preicelanica, which has a consistent tublular shape and hardness and holes along the walls, allowing moisture to be absorbed. All of these attributes are important in the physical mechanical action of scratching and dehydrating parasites.