Salt (Himalayan).

Sodium delivered to the distal tubule is reabsorbed in exchange for potassium secretion, so a high sodium load raises urinary potassium loss. Formulators pair the two in rehydration products for that reason. The ratio matters more than either amount on its own. This is fluid and electrolyte handling, not a claim about blood pressure.

Loop sodium transport sets up the positive luminal potential that pulls magnesium back paracellularly. Large sodium and water loads that increase flow through the loop increase magnesium loss in urine. The two are routinely combined in electrolyte blends because of that coupling. Trace magnesium naturally present in rock salt is far too small to matter against a formulated dose.

Sodium is the osmotic driver of intestinal water uptake and the main cation lost in sweat, so it is the anchor of any electrolyte product. Rock salt supplies both sodium and chloride in a single ingredient. Using an unrefined salt in place of refined salt changes the mineral label by a rounding error, not the function. The pairing is formulation convention.

A bicarbonate loading dose already carries a large amount of sodium. Adding salt on top compounds the total, and the combined osmotic load in the gut is what drives the bloating and loose stools people report at high bicarbonate doses. Anyone stacking the two should count sodium from both. Regard the interaction as additive on sodium, not on any performance measure.

Creatine uptake into muscle physically requires a sodium gradient across the membrane, which is why creatine transport stops in sodium-free buffer. That is settled cell biology. It does not follow that eating more salt raises muscle creatine in a person, since the gradient is maintained regardless of dietary intake. The two are often co-formulated for water retention and palatability reasons instead.

Iodised table salt carries added potassium iodide or iodate at a defined level. Himalayan rock salt contains only trace native iodine, well below that, and the amount is not declared or controlled. Someone who swaps all household salt for the rock form loses that intake without noticing. Where iodised salt is a person's main iodine source, this is worth flagging.

Blocking that enzyme lets cortisol act on the mineralocorticoid receptor, which drives sodium retention and potassium loss. A high sodium intake on top pushes the same direction. The combination raises blood pressure more than either does alone in reported cases. Deglycyrrhizinated licorice does not carry this interaction.

Gastric acid is secreted as hydrogen and chloride ions, and the chloride comes from the extracellular pool that dietary sodium chloride feeds. Severe chloride depletion limits acid output. In ordinary intakes chloride is never the limiting factor, so this is background physiology rather than a reason to add salt. It matters mainly in people losing large amounts of chloride through vomiting or diuretic use.