Remember that the average body NEEDS 6gm of salt a day and that it's insulin, not sodium that drives hypertension. Insulin hangs on to sodium, sodium increases blood volume which drives up blood pressure and thus elevates pressure on the kidneys. Typical of anyone with T2 diabetes and metabolic syndrome. A normal healthy individual can consume just about any amount of salt (difficult to do) and will merely excrete the excess as a normal bodily function.
A largely hidden benefit of LCHF.