CELATOM AFA Food Grade Diatomaceous Earth is the purest Food Grade Diatomaceous Earth we have found; based on each companies published analysis. MN-51/AFA (Animal Feed Additive) is a CODEX Food-Grade natural diatomaceous earth (D.E.) product composed of microscopic diatoms that were deposited in ancient lake beds. These diatoms are made of amorphous silica in complex lacy shapes, which promotes a high absorption capacity and makes AFA an ideal product for anti-caking applications in grain and animal feed storage. AFA is non-toxic and safe for the environment. The benefits of D.E. as a natural insecticide for grain storage, garden, and animal use are well-established in practice. Natural D.E. powders have been used by farmers for centuries. With the increased popularity of organic and sustainable farming methods, more and more livestock and pet owners are re-discovering the natural benefits of D.E. as an animal feed additive. We cannot make claims about internal therapeutic benefits because of the prohibitive expense of the clinical studies that would be required by the government. However, many livestock and pet owners that have used AFA over the long term tell us they have experienced: When insects come in contact with diatomaceous earth, the D.E. absorbs their protective wax coating and their shells are damaged by the glassy diatoms. This combination causes them to die by dehydration. There is no survival and no built-up immunity as there is with chemical insecticides. D.E. also does not break down as chemicals do, and the more that it is used, the more insects feel unwelcome in the area.