Bookmarking this 2021 study on POTS and sodium intake, which showed remarkable improvement to resting heart rate, nor/epinephrine, aldosterone, and plasma renin activity after one week on a high sodium diet.
Effect of High Dietary Sodium Intake in Patients with Postural Tachycardia Syndrome - PMC
High sodium intake is recommended for the treatment of postural tachycardia syndrome (POTS) to counteract the hypovolemia and elevated plasma norepinephrine that contribute to excessive orthostatic tachycardia, but evidence of its efficacy is not ...
pmc.ncbi.nlm.nih.gov