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Heart & Circulation

Cutting Salt Is Only Half the Blood Pressure Fix

What the evidence actually says

Cutting salt lowers blood pressure, but potassium does the other half of the job, and most people fall short of it. The American Heart Association says potassium blunts the effect of sodium: the more you eat, the more sodium your kidneys flush out, and it also relaxes the walls of your blood vessels. You get it from food, not from a shaker.

  1. 1Sodium is half the story · potassium does the other half by helping your kidneys push sodium out
  2. 2It relaxes vessels · potassium eases tension in your blood vessel walls, which lowers pressure
  3. 3Most people fall short · surveys show Americans eat too much sodium and too little potassium
  4. 4Aim high, from food · the AHA suggests 3,500 to 5,000 mg a day, mostly from fruits and vegetables
  5. 5One real caveat · kidney disease and some pressure drugs make extra potassium risky, so ask first
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You already know the salt rule. Eat less sodium, and your blood pressure has a better chance of coming down. It is good advice, and it is only half of the advice.

The other half is a mineral most people barely think about. Potassium works against sodium inside your body, and the American Heart Association says it can blunt sodium's effect on your blood pressure. Cut one and raise the other, and the two changes pull in the same direction.

1
How it works

Potassium Pushes Sodium Back Out

The AHA explains the mechanism plainly: the more potassium you eat, the more sodium you lose through your urine. Cleveland Clinic puts it the same way, noting potassium helps the kidneys excrete excess sodium instead of holding on to it. Less retained sodium means less pressure in your arteries.

Bananas and oranges in a bin alongside bell peppers
Bananas and oranges are classic potassium sources, yet one banana holds only about 450 milligrams of the daily target.
2
The second effect

It Also Relaxes Your Blood Vessels

Sodium is not the whole job. Potassium also eases tension in the walls of your blood vessels, the AHA notes, and that relaxation lowers pressure on its own. Cleveland Clinic adds that because potassium supports the vessels feeding your brain, kidneys and heart, it is linked to a lower risk of stroke and heart disease.

3
The gap

Most People Get Too Little

Here is the catch. Cleveland Clinic notes that surveys repeatedly show Americans eat too much sodium and not enough potassium, and the NIH Office of Dietary Supplements confirms most people fall short of the recommended amount. The AHA suggests aiming for 3,500 to 5,000 milligrams a day, ideally from food. A medium banana carries only about 450 milligrams, so swapping the shaker alone will not get you there.

Potassium can reduce the effects of sodium. The more potassium you eat, the more sodium you lose through urine.
That is why the two changes belong together. Cutting salt without adding potassium leaves half the benefit on the table.
American Heart Association, 2025
4
Where to find it

The Foods That Carry It

You do not need a supplement to hit the target. The AHA's potassium list runs through everyday foods: potatoes, spinach, beans, yogurt, oranges and fish among them. The DASH eating plan, built to lower blood pressure, is essentially a potassium-rich pattern of fruits, vegetables, whole grains and low-fat dairy.

Bunches of fresh leafy greens
Leafy greens, beans, potatoes and yogurt build the potassium-rich, blood pressure lowering DASH pattern.
5
The safety line

More Is Not Always Better

There is one real caution. Cleveland Clinic warns that some common blood pressure drugs, including ACE inhibitors and ARBs, already make your body hold on to potassium, and people with kidney disease cannot clear the excess. For them, more potassium can be dangerous. Check with your provider before using supplements or salt substitutes.

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1
Add Potassium Every Time You Cut Salt
Treat the two as one move. When you reach for less salt, add a potassium-rich food to the plate: a side of spinach, a scoop of beans, a baked potato or plain yogurt. The AHA says food is the best source.
2
Build Meals on the DASH Pattern
Lean your plate toward fruits, vegetables, whole grains and low-fat dairy. That pattern, designed to lower blood pressure, naturally lands you near the 3,500 to 5,000 milligram target without counting anything.
3
Clear It With Your Provider First
If you have kidney disease or take an ACE inhibitor, ARB or other blood pressure medicine, ask before loading up on potassium or using a salt substitute. Those combinations can push your levels too high.
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Frequently Asked Questions

Does potassium really lower blood pressure?
Yes. Both the AHA and Cleveland Clinic explain that potassium helps your kidneys flush out excess sodium and relaxes your blood vessel walls, and both effects lower blood pressure.
Is cutting salt not enough?
Cutting sodium helps, but the AHA frames potassium as the partner move. The more potassium you eat, the more sodium you lose, so raising one while lowering the other works better than either alone.
How much potassium should I aim for?
The AHA suggests 3,500 to 5,000 milligrams a day, ideally from food. Most Americans fall short, according to Cleveland Clinic.
What foods are highest in potassium?
The AHA lists potatoes, spinach, beans, yogurt, oranges, bananas and fish among many others. The DASH eating pattern is built around these foods.
Can you get too much potassium?
Yes. Cleveland Clinic warns that people with kidney disease, and those on ACE inhibitors or ARBs, can build up dangerous levels. Check with your provider before supplements or salt substitutes.
Is this medical advice?
No. This article is educational and is not a substitute for your clinician. Talk to your provider before making big diet changes, especially if you take blood pressure medicine.
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By the Ageless Coach Editorial Team · Published August 11, 2026 · Last updated August 11, 2026

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