Gastric bypass surgery, also known as gastric bypass, is a highly effective surgical procedure for the treatment of severe obesity and related health conditions. This article provides an in-depth exploration of gastric bypass surgery, including its surgical technique, mechanisms of action, potential benefits and risks, preoperative considerations, postoperative care, and long-term outcomes. Through a thorough examination of the current evidence and clinical practice guidelines, this article aims to provide a comprehensive understanding of gastric bypass surgery and its role in the management of obesity and metabolic disorders.