People who excrete more than 1.5 grams of potassium per day are less likely to die or have serious heart problems than those who excrete less, no matter how much salt they eat.

For people who already have heart disease, the more potassium their body gets rid of in urine, the more likely they are to have a heart attack, stroke, or die — which is the opposite of what most people think potassium does.

For people who already have heart disease, having just the right balance of salt and potassium in their urine — not too much, not too little — seems to be linked to the lowest chance of heart problems or dying from any cause. Too little or too much of this balance is linked to higher risks.

If you eat a little more potassium-rich food each day—like bananas or spinach—you might lower your risk of stroke and reduce your blood pressure a bit, even if you don’t change how much salt you eat.

Eating more potassium-rich foods like bananas, spinach, and potatoes is linked to a lower risk of heart problems.

If older Dutch people who’ve never had heart problems or high blood pressure eat more potassium-rich foods like bananas and spinach, they’re less likely to die from any cause over the next five years—so eating more potassium might help them live longer.