Research into the role of oxidative stress and fatty acids in neuropsychiatric disorders has been ongoing for decades and has been written about before. However, this book aims to examine how these seemingly disparate bodies of evidence from the fields of oxidative stress and essential fatty acid metabolism are, in fact, intimately connected to each other. Therefore, for this book the editors invited researchers of oxidative stress (OS) and essential fatty acid (EFA) in neuropsychiatric disorders, exemplified by schizophrenia, mood disorders, Parkinson’s disease and Alzheimer’s disease. Together, the chapters bring a fresh perspective on the relationship between the presence of oxidative stress in the afore-mentioned disorders and the fatty acid deficits that have been identified in these disorders.