I guess you could call this a shower thought but out of the blue I thought about this. How does our stomach acids not float up our throats in zero G? I’m not familiar with how our bodies work in space and would love to hear an explanation
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How does our stomach acids not float up our throats in zero G?
the short answer is…. stomach acid *does* float up into the esophagus in zero G.
Acid reflux and heartburn are a persistent problem for astronauts, for exactly the reasons you’ve described. without gravity, acid is more likely to find it’s way up in to the esophagus. [Burping is also a problem](https://www.cbsnews.com/news/astronauts-share-what-its-really-like-in-space/), because a burp can easily lead to vomiting in zero gravity.
How do astronauts deal with it? They take acid blocking medicine like you’d find in any pharmacy, and they try not to burp.
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