Keep dogs and cats happy and healthy. Protect pets from fleas. Diatomaceous earth is an environmentally friendly alternative to toxic commercial flea and tick treatments. Diatomaceous earth is a fine powder composed of the crushed fossilized exoskeletons of microscopic diatoms. This is a remarkable substance that is a desiccant-it actually dries out the waxy outer layer of fleas, causing them death by dehydration. In tests performed by the USDA, as well as a number of consumer trials, diatomaceous earth has proven to be an effective non-chemical insect control. Diatomaceous Earth (DE) is not earth or dirt. It is the fossilized remains of microscopic shells created by one-celled aquatic plants (diatoms). Over the eons, as these diatoms fossilized, they retained their tubular shape and holes. Their shape and hardness produce extremely pure and consistent DE. Lumino DE is almost pure white and consists of 89-94% silicon dioxide plus 28 trace minerals. The silica in Lumino DE is amorphous. This is silica in its naturally occurring state. It is a trace mineral every mammal on the planet needs for survival. The silica in DE becomes crystalline when it is exposed to extreme heat through volcanic activity or commercial manufacturing. Seen through an electron microscope, individual DE cells look like old fashion hair curlers, basically a cylinder covered with multiple pointy sharp edges. These points give DE its strong yet gentle abrasive quality. The surface area of the cylinder creates the ability to be a super dessicant. DE points are too small to pierce the skin of pets and people. Healthy humans or pets should have no problems or reactions. All Lumino DE products (including pet versions) are tested on people. Individuals with severe respiratory difficulties should be careful when dusting with fine powders such as DE, and wear a mask or respirator.