There’s a chance you’ve heard of the runaway bestseller 'Grain Brain.' The book has been so successful in the two years since its release, it’s still offered only in hardcover. Many people accept its crusade against gluten and other grains as fact rather than pseudoscience, but recently, evidence has come to light that the book's neurologist author, David Perlmutter, may be using false logic. Is Perlmutter just the most recent member of the age-old snake oil gang, out to make a buck by exploiting suffering people who are desperate to feel better? Or is science simply behind the times when it comes to understanding the impact of processed carbohydrates on the body? Whichever your point of view, it’s worth reading this comprehensive, well-researched takedown before forming your opinion. Once you've made up your mind, we hope you'll share your conclusions in the comments.