If I remember right germin, Jordan Rubin (I think he talks about it in a couple of his blogs) is a big fan of this stuff, and used it almost daily as part of his health regime when he was battling Chron's. I've never tried it, but I've been curious about it's benefits as well. You might have just given me my next topic to research out :D
Hello codex means recognized standards for purity and identity of food ingredients. Food Grade Diatomaceous earth receives a codex grade therefore making it 100% safe for human consumption. There is alot of information on all its uses including human consumption, pet and livestock as well as horticultural at www.diatomearthoutwest.ca. It is a Canadian site based out of British Columbia, Canada. I use it and so does all my animals! I love it!