400G PERMA GUARD DIATOMACEOUS EARTH FOSSIL SHELL FLOUR POWDER All our Perma Guard DE are certified and come in resealable food grade and sealed bags. Many other Diatomaceous Earth products do not have verified credentials. Ours is Perma-Guard certified food grade Fossil Shell Flour. Please ensure that you only ingest Diatomaceous Earth that is Perma-Guard. Certifications Food Grade - registered as a food additive with the FDA OMRI (Organic Materials Review Institute) Certified Kosher Certified Perma-Guard is the original and largest supplier of food grade Diatomaceous Earth in the world. Perma-Guard is the trade name for the highest grade and quality Diatomaceous Earth. Perma-Guard Diatomaceous Earth is the fossilized remains from microscopic shells of freshwater plankton called diatoms. Perma-Guard Diatomaceous Earth is sourced from an extremely pure fresh water deposit of the diatom Melosira Preicelanica. This diatom is unique because its shell is made of amorphous silica. Its shape and hardness are important to how it works. Fresh Water vs. Salt Water Diatomaceous Earth Perma-Guard's fresh water deposits have a unique and consistent diatom presence. Their fossilised shells have maintained their tubular shape. This shape and strength of the fossil shell is critical to its effectiveness. Perma-Guard deposits have 89-95% amorphous silica content and contains 28 trace minerals. Salt water deposits contain a mix of types of diatoms of different shapes. Their fossilised shells are fragile and break easily. This renders them ineffective for our purposes. How To Use Diatomaceous Earth Human Ingestion and Consumption Pets: When lightly rubbed into their coats or dusted on their premises Diatomaceous Earth is very effective against fleas ticks lice and other pests on dogs cats and birds. It can also be used as an organic wormer and will kill any worms or parasites. Diatomaceous Earth as part of older pets' diets will assist in maintaining joint health. When using as a de