Gastric bypass inoles reducing the size of the stomach and bypassing part of the small intestine, where digestion occurs. People eat less and absorb fewer calories as a result.

• 胃肠分流术包括缩小胃容积以及与部分小肠形成旁路，两者均参与消化过程，进而导致人们吃得更少或吸收更少的热量。