Microbiome Metabolome Brain Vagus Nerve Circuit in Disease and Recovery focuses on the emerging hypothesis of a dysfunctional microbiome metabolome vagus nerve brain circuit in Alzheimer’s disease and associated diseases and medical conditions, including dementia, aging, COVID-19, autoimmune conditions, and inflammatory skin condition rosacea, which may increase the risk of other conditions. This book also discusses the vagus nerve-related conditions, including Arnold’s reflex, laryngopharyngeal reflux, duodenogastric reflux, gastroesophageal reflux, and related pulmonary diseases. The...