Sodium is wildly misunderstood and mismanaged.
If you want to understand sodium you should spend the time to truly understand The Edelman Formula. I have seen no better explanation of this formula than this powerpoint by Graham Gipson (who incidentally also designed the 2023 NephMadness logo). It is 133 slides long, but he has printed each build of the slides separately, and I found it fairly self guided. He beautifully shows how the EdelsonFformula can be derived using first principles and algebra and ends with demonstrating how the formula (nearly) perfectly predicts the results of Edelman’s classic 1958 experiment.