Diabetes mellitus is one of the most challenging health problems of the 21st century, the global prevalence is rising dramatically and it is estimated that 425 million people are currently with diabetes. Despite substantial advances in pharmacotherapy and disease management, a large number of patients remain inadequately controlled and complete remission of hyperglycemia is rare. The book presents a research study introducing Mini-Gastric Bypass as the operation of choice for the treatment of type 2 diabetes mellitus. This book is also presenting a review about current bariatric procedures, describes the fine details of Mini-Gastric Bypass and discusses its results in comparison with literature. The book contains valuable details suitable for graduate and postgraduate researchers in the field of metabolic surgery.