"The limiting factor in urine distillation is actually the high level of calcium 
    from disintegrating astronaut bone, a nice example of how problems in space find 
    ways to compound one another."

Sobering. One of the many long term effects of life away from Earth.[1]

With humanity's future probably (?) driving more of us to leave the planet, I'm glad these things are being studied. Where there's a will, there's a way.

[1] "Long-term space missions’ effects on the human organism: what we do know and what requires further research" https://pmc.ncbi.nlm.nih.gov/articles/PMC10896920