Dr. Greenblatt explains his integrative as well as a functional medicine approach to depression. This combines traditional medical science with nutritional and metabolic therapies. There are many contributing factors to depression including metabolic, physical illnesses, the immune system, hormones, genetics, and psychological factors such as stress. He looks at these factors as well as the uniqueness of each person's metabolic and nutrition abnormalities that may contribute to depression. This approach can successfully treat many individuals suffering from depression. This book offers hope and treatment models that are simple, safe, and effective. He has been using these therapies for more than thirty years and has seen thousands of patients improve and recover from depression