Sodium is an electrolyte, a humble member of that hyped class of minerals that help maintain muscle function and hydration; that’s why sport drinks contain sodium. You’re constantly losing sodium through sweat and urine, and if you don’t replenish that sodium and water, your blood pressure may drop far enough to make you dizzy and light-headed. “Sodium acts like a sponge to help hold fluids in your blood,” says Rikki Keen, R.D., an adjunct instructor of dietetics and nutrition at the University of Alaska.
The Truth About Salt
