Dr David Perlmutter's #1 New York Times bestseller about the devastating effects of gluten, sugar, and carbs on the brain and body - updated with the latest nutritional and neurological science. When Grain Brain was published in 2013, Dr Perlmutter kick-started a revolution. Since then, his book has been translated into 30 languages, and more than 1.5 million readers have been given the tools to make monumental life-changing improvements to their health. They've lost weight, banished anxiety and depression, reduced or eliminated chronic conditions, and taken proactive steps to safeguard themselves against cognitive decline and neurological disease - all without drugs.