The Overlooked Mineral That Standard Blood Pressure Advice Leaves Out

If you asked a medical professional for dietary advice about dealing with high blood pressure, they would probably tell you to lower your sodium intake. Sound advice, but there may be an overlooked electrolyte that could also help the situation.

A WHO-commissioned meta-analysis combined 22 randomized trials to ask: does eating more potassium lower blood pressure? For people with hypertension, the answer was yes.

Not only yes, but a meaningful yes. Blood pressure dropped by about 3.5 mmHg on average, and up to 7.2 mmHg at higher intake levels. That's a clinically meaningful drop, in the same ballpark as what some medications achieve for mild hypertension.

The reason potassium intake helps is twofold. Potassium lowers blood pressure by signaling the kidneys to flush out more sodium in urine. It also relaxes artery walls by opening potassium channels, which reduces vessel tension and lowers pressure. What's interesting is that this is a separate mechanism from the way in which lowering sodium intake affects blood pressure. So the two work well in tandem; it's not a redundant effect.

Unfortunately, the average daily potassium intake is 2,300mg, while the recommended intake lies between 2,600mg and 3,400mg. Good sources of potassium include potatoes, avocado, coconut water, and bananas.

Cutting sodium and raising potassium are not competing strategies; they complement each other through different biological pathways. Yet only one tends to make it into the standard advice. Given how achievable the intake target is through everyday foods, potassium may be the most underutilized tool in the dietary management of high blood pressure.

Copyright 2026 The Arena Group, Inc. All Rights Reserved

This story was originally published May 30, 2026 at 12:59 PM.