http://www.oxypowder.com
Only one place, or if you see it somewhere else, they are dealers. Once I shopped around, but it was the same price. Then I checked into buying a lot and reselling it cheaper (like at cost) to curezone people, but that was not allowed. So it is pretty well controlled. Sometimes they send me an e-mail for $5 off, I publish that on the bowel/liver cleanse forums. I heard from one person that they made use of it, so that is good to know.