" But here is the dark little secret in all of this, and it sounds very odd to say it: glucose is toxic. It is poison, and the body regards it just that way. We have spent generations now in a search for toxins that sponsor the diseases that ail us, the industrial chemicals, pesticides, and pollutants that may kill us, and yes, these may be killing us. But the supreme irony in all of this is that the obvious toxin hides in plain sight. It’s difficult to accuse the very substance on which all of civilization depends. People who consider these matters often refer to the “omnivore’s dilemma,” but it gets more and more difficult to claim to be omnivores, creatures that eat both plants and animals. The prima facie case is we have become carbovores as a result of our domestication by grain. This is the carbovore’s dilemma: we exist for the most part on a substance that our bloodstream treats as a toxin. "

― John J. Ratey , Go Wild: Free Your Body and Mind from the Afflictions of Civilization