Gut-Brain Secrets explains how friendly bacteria in your digestive tract nourish and protect your good health, resiliency and longevity. Or bad bacteria slowly poison you from within... upsetting your brain biochemistry, and causing attention deficit disorder, autism, depression, anxiety, and other GAPS conditions (as defined by Dr. Natasha Campbell-McBride). A "corrupted gut, " as the author calls a disordered microbiome, is also the root cause of digestive disorders such as leaky gut, food sensitivities, autoimmunity, and the diseases of modern man.