The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
It just so happens that because fluid balance both inside and outside of cells is crucial not just for your heart and for your lungs and for your liver and for all the organs of your body but also for your brain that if the salt concentration inside of cells in your brain go becomes too high, neurons suffer, right? they will draw fluid into those cells because water tends to follow salt as
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Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
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if the salt concentration inside of cells in your brain go becomes too high, neurons suffer, right? they will draw fluid into those cells because water tends to follow salt as I mentioned before and those cells can swell. You can literally get swelling of brain tissue.
if salt levels are too low inside of cells in any tissue of the body, but in the brain included, then the cells of the body and brain can shrink because water is pulled into the extracellular space away from cells. And indeed, under those conditions, brain function can suffer and indeed the overall health of the brain can suffer.
There is a school of thought that everybody is consuming too much salt. And I do want to highlight the fact that there are dozens if not hundreds of quality papers that point to the fact that a quote unquote high salt diet can be bad for various organs and tissues in the body, including the brain.