Blood tests reveal why astronauts get constipated in space

Blood samples from 52 astronauts show signs that gut bacteria break down more protein during spaceflight. Researchers suspect slower movement of food through the intestines may contribute to both this change and constipation, but the proposed cause has not been proved.

对52名宇航员血液样本的分析显示，太空飞行期间，肠道细菌分解蛋白质的迹象增多。研究人员怀疑，食物在肠道中移动变慢可能与这一变化及便秘有关，但这一原因尚未得到证实。