I'm talking about everybody else because everybody else is susceptible to the gliadin protein that is an opiate. This thing binds into the opiate receptors in your brain and in most people stimulates appetite, such that we consume 440 more calories per day, 365 days per year."

To avoid these wheat-oriented products, Davis suggests eating "real food," such as avocados, olives, olive oil, meats, and vegetables.

"(It's) the stuff that is least likely to have been changed by agribusiness," he said.

"Certainly not grains. When I say grains, of course, over 90 per cent of all grains we eat will be wheat, it's not barley... or flax. It's going to be wheat.

"It's really a wheat issue," he added.