The second link was especially interesting. I had been having intermittent kidney pain since going low oxalate and it’s basically stopped after adding back 1 mg k2 most days.Search these for oxalates:
Nutristart
This thread has some stuff on K2 and oxalate connection. Theorized that K2 breaks down calcium oxalate crystals and hence liberates oxalate to be dumped. Something along those lines:
Oxalate Dumping - a Probiotic Solution?