[0] https://vostokspacebeer.com/
It looks like it's just beer in a special bottle that they say will work in zero-G.
The yeast will breed and die while fermenting, so the yeast you finish with will be different to that which you started with.
So its more like 'yeast whose forebears had gone to space'.
And do they save and reuse the batch of 'space yeast' or send a fresh batch to space for each brew?
It looks like it's just beer in a special bottle that they say will work in zero-G.