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Constipation is common in astronauts—blood tests provide new answers

Summary by Phys.org
For astronauts in space, constipation is a well-known problem. But why this happens has long been unclear. Now, a new study from the University of Copenhagen in collaboration with NASA provides an idea of what happens in the stomach without the influence of gravity.

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Researchers from the University of Copenhagen have now found out why many astronauts suffer from constipation. This is reported by dr.dk. The reason is that the lack of gravity causes food to stay longer in the intestine. This creates increased protein fermentation, which is a process where bacteria begin to break down protein when there is no more fiber present. - It can affect both kidney function and brain function in a negative way, it seems…

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Phys.org broke the news in Douglas, United Kingdom on Friday, August 14, 2026.
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