@lindisfel I thought you were genuinely asking how early man managed his electrolytes & I was just passing on what I had read &/or heard.
It is ok Safi there obviously has been an whole range of electrolyte inputs over human history.
And for the most part healthy bodies can compensate for this without us tinkering with it. Animals and early humans knew the food they needed.
We have lost our touch with nature.
I guess if people go from a high carb diet and have insulin resistance and go keto the body has a hugh shock.
Hyperinsulinemia hacks the RAAS and causes the body to retain sodium via increasing angiotensin 2, aldosterone increases and body stops the kidneys releasing sodium. The arteries constrict.
Low carb stops the above and brings down blood pressure.
The RAAS is designed to work on low salt because low salt causes the BP to drop and RAAS's proper function is to put BP up via increasing aldosterone.
Therefore low salt for a normal person causes the arteries to constrict and have higher aldosterone and retain sodium via kidneys. Not good as Donald Trump would say.
I see both sides of this equation because I have enough aldosterone to supply twenty of you guys!
Some of us take drugs to control the RAAS stop it working and bring BP down.
And incidentally get rid of more sodium.
D.