Natures Wisdom Food Grade Diatomaceous Earth is totally organic and safe. It contains less than 1% percent of Crystal & Silicon. Some of the uses for Diatomaceous Earth include; household pets, gardens, flower beds, field crops, grain storage, and livestock feeding. Diatomaceous Earth is Mother Nature's product with no harm to the environment, pets or to people. Diatomaceous Earth is not an earth, it is the fossilized remains of microscopic shells created by one celled plants called DIATOMS. Diatomaceous Earth kills by physical action, not chemical, by puncturing the insects exoskeleton and absorbing its body fluids, thus posing no harm to warm-blooded life. Moreover, on any surface, these natural pesticide products have a remarkable repellency factor. As long as it is present, insects tend to stay away, making a serious infestation unlikely. Also, the more it is used, the more an environment is created that tends to make insects feel unwelcome. Out of 600 deposits in the US only 4 are considered "food grade" by the FDA standards. Other food grade deposits still may contain higher amounts of sediment and clay that make them less effective. We have analysis of many other "Food Grade" deposits and are satisfied that we still obtain the diatomaceous earth for our products from the purest fresh water source. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.