Americans are sick. Brain function disorders are so rampant that our children suffer from a literal “alphabet soup” of maladies: attention deficit disorder (ADD), attention-deficit/hyperactivity disorder (ADHD), autism spectrum disorder (ASD), obsessive-compulsive disorder (OCD), and sensory processing disorder (SPD)—just to name a few. Digestive system disorders have their own alphabet soup of names: irritable bowel [...]