胃旁路手术是常见的减肥术，该手术方式为减小胃囊，改变食物进入小肠的路径，使受术者术后吃饭时很快产生饱腹感、减少食物的吸收。

The procedure reduces the stomach to a small pouch and diverts food around part of the small intestine. Less food is absorbed and the individual feels full sooner, leading to weight loss.

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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。

Gastric bypass involves 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.

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