Startling news! According to Dr. Colbert, 75 percent of your immune cells are located in your gut, so whatever inflames your digestive area will eventually impact your brain---resulting in memory loss, brain fog, and neurodegenerative diseases. Check out his plan, incorporating short times of fasting with healthy eating and easy-to-use lists of foods to eat and to avoid. 256 pages, hardcover from Siloam.