More at the Daily Kos.
Del Monte Foods has confirmed that the melamine-tainted wheat gluten used in several of its recalled pet food products was supplied as a "food grade" additive, raising the likelihood that contaminated wheat gluten might have entered the human food supply.
"Yes, it is food grade," Del Monte spokesperson Melissa Murphy-Brown wrote in reply to an e-mail query....Wheat gluten is sold in both "food grade" and "feed grade" varieties. Either may be used in pet food, but only "food grade" gluten may be used in the manufacture of products meant for human consumption. Published reports have thus far focused on tainted pet food, but if the gluten in question entered the human food supply through a major food products supplier and processor, it could potentially contaminate thousands of products and hundreds of millions of units nationwide. - Huffington Post and Goldy's