After the initial round of testing, two-thirds of the volunteers had gastric bypass surgery to reduce the size of the stomach and lost an average of about 3st 8lbs.

在经过第一轮的测试之后，有三分之二的受测人员进行了胃绕道手术，以减小腹部、减轻体重。

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Gastric bypass surgery which reduces the size of the stomach and bypasses a section of the intestines to decrease food absorption accounted for 94 percent of bariatric procedures.

的减肥手术病人进行胃旁路手术包括减小胃容量和小肠旁路以降低食物吸收。

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Gastric bypass, or stomach-stapling surgery, is the most common obesity operation performed in the United States with about 177,600 people undergoing the procedure last year.

胃肠分流术或胃吻合手术是美国最常见的肥胖治疗手术，去年一年有大约177600人接受了此类手术。

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This may be due to surgery to your stomach or small intestine (such as gastric bypass surgery), abnormal bacterial growth in your small intestine, or an intestinal disease, such as Crohn's disease or celiac disease, that interferes with absorption of the vitamin.

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In gastric bypass surgery, a portion of the stomach is stapled to create the pouch and the intestines are rerouted to the new, smaller stomach.

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Each is intended to deal with the often unsightly and sometimes unhealthy aftereffects of gastric bypass surgery, a procedure in which part of the stomach is tied off to reduce the amount that patients eat.

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