The official lifestyle companion guide to Dr. David Perlmutter's revolutionary approach to vibrant health, as described in his international bestsellers Grain Brain, The Grain Brain Cookbook, and Brain Maker. With over one million copies sold worldwide, Dr. Perlmutter's books have changed the lives of people across the globe, revealing the devastating truth about the effects of gluten on the brain and teaching us how to reprogram our genetic destiny. Now, Dr. Perlmutter has written the definitiv