Bush had moved to the Paleo diet, which is "based upon everyday, modern foods that mimic the food groups of our pre-agricultural, hunter-gatherer ancestors," according to the diet's official website.
However, in a tour of Bush's campaign bus with ABC News' Jonathan Karl, Bush revealed that even a candidate for the nation's highest office can get away with cheating every once in a while.
Bush showed Karl a package of turkey jerky, saying it was what he ate for "breakfast, lunch and dinner," but then pulled out a package of peanut M&Ms.
"This, on the other hand, is how we cheat at night," Bush said.
M&Ms, even with peanuts, would certainly violate the Paleo diet's restrictions against processed foods, but it's hardly the first time we've seen Bush blur the lines of his diet regimen.
In a tour of the Iowa state festival this summer, Bush was observed snacking on several of the deep-fried delicacies available to visitors.