What does an austronaut’s microbiome look like?

What happens to your gut in orbit could teach us a lot about health back on Earth.

These changes matter because your microbiome is closely related to your immune system (with 70% of your immune cells found in your gut).

And microbes are linked to many health issues faced in space.

Like how astronauts can get constipated, get skin flares ups, and their immune defences tend to drop (sometimes reawakening long-dormant viruses like herpes).

So understandi...