I know I can get it online but I rather go to a store if I can. I searched my local healthfood store websites like gnc, vitaminworld, vitamin shoppe and nothing comes up..
I've bought it at my local nursery (use it to control ants in my garden). BTW, the correct spelling is "diatomaceous" - your Internet search should yield several online sources for this product.
I don't know about "food grade" quality diatomaceous earth. I do know that the product I bought can be used in the pantry. It's especially helpful if you buy grains in bulk - sprinkle on rice and other grains to kill insects - won't harm humans. Hope this helps.