The case of the labels warning of genetically modified wheat found on Kraft Mac & Cheese boxes in Britain has been solved.

The labels, posted on the product’s own Facebook page and picked up by a food blogger, set off a buzz among consumers overseas and in the United States around the same time last week that modified wheat was found in a field in Oregon.

The problem, it seems, is that Kraft does not use genetically engineered wheat, which is not commercially available, according to a spokeswoman. So the label’s origins perplexed Kraft officials.

“We have no authorized distributor there,” said the spokeswoman, Lynne Galia, referring to Britain.

“Anyone implying that G.E. wheat is in Kraft Mac & Cheese or any of our products is wrong,” Ms. Galia added, noting that Kraft buys wheat from Canada and the United States.