Smite Organic Powder is an organic, naturally-mined, mineral product made up of fossilized remains of diatoms, a type of hard-shelled algae. When crushed to a fine powder it feels similar to chalk powder to the touch, but when viewed under a microscope the fine particles resemble shards of broken glass! It is this 'broken glass' effect which is deadly to any insect, but harmless to animals, fish, fowl, food and humans.