They increase intestinal and fecal bulk, which lowers intestinal transit time and helps prevent constipation.

它们增加肠和盲肠的填充量，降低肠转送时间，防止便秘。

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Lactose and glucose tolerance tests, intestinal transit time and test for intestinal bacterial overgrowth were performed in 26 postgastrectomy patients using CM type. Hydrogen gas Microlyzor.

用CM型氢气微分析仪对26例胃大部份切除病人作乳糖及葡萄糖耐量测试、小肠传递时间的测定及小肠细菌过度生长的检测。

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The researchers will test the participants' glucose tolerance, the time it takes for digested food to transit through the intestinal tract, and the amount of calories in the patients' stool.

CNN: Can you smell obesity?

It's also possible, says Mathur, that the release of methane slows the transit of digested food through the intestinal tract, and that could increase the time for additional calories from digested food to be absorbed and added to the body's tally.

CNN: Can you smell obesity?