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Researchers Now Understand Why Astronauts Can't 'Go'
Newser • • health
Key Points:
- A NASA-funded study analyzing over 400 blood samples from 52 astronauts revealed that microgravity slows intestinal food movement, causing gut bacteria to shift from fiber digestion to protein fermentation.
- This protein fermentation process, which begins within weeks in orbit and can continue after returning to Earth, helps explain the high incidence of constipation among astronauts.
- The study, published in Nature Communications, highlights potential long-term health risks from protein fermentation byproducts like ammonia and hydrogen sulfide, which are linked to kidney issues, inflammation, and cognitive effects.
- These findings raise concerns for extended space missions, such as trips to Mars, prompting discussions on countermeasures including increased dietary fiber, probiotics, and methods to stimulate gut motility through drugs or massage.
