Why Hypertension Advice Is Adding Potassium to the Sodium Message

A new report in The American Journal of Clinical Nutrition argues that blood-pressure guidance has been too narrow for too long. The stronger message, the report suggests, is not simply to cut sodium but to improve the balance between sodium and potassium: reducing the first while increasing the second appears to do more for blood pressure than either change alone.

That position is supported by a 2025 meta-analysis cited in the article. Among people with hypertension, adding roughly 2,000 mg of potassium per day was associated with a reduction of about 5 mmHg in systolic blood pressure and about 3 mmHg in diastolic blood pressure. The response is not immediate; sodium reduction may lower blood pressure first by reducing fluid volume, while potassium’s effect on blood vessel relaxation tends to build over one to two weeks and stabilize after a few weeks.

The size of the gap helps explain the urgency. More than 98% of U.S. adults miss daily potassium recommendations, while sodium intake remains high—mostly from hidden sources such as restaurant meals, canned and frozen foods, packaged breads and snacks rather than salt added at the table.

The practical implication is not a single superfood or supplement, but a dietary pattern. Experts point to potassium-rich whole foods and the DASH eating plan as the most realistic way to improve the sodium-to-potassium ratio while avoiding the risks of unsupervised supplementation.

What the Sodium-Potassium Ratio Changes About Blood Pressure Guidance

Behind the headline, the scientific shift is from treating sodium and potassium as separate problems to treating their ratio as the relevant signal. Potassium helps the body excrete sodium and relaxes blood vessel walls, which is why a high-sodium, low-potassium diet can raise blood pressure even when neither mineral is at an extreme level.

Why the Sodium-Potassium Ratio Is Gaining Ground

Recent research cited in the report suggests the sodium-to-potassium ratio is a stronger predictor of cardiovascular outcomes than sodium intake alone. That reframes the usual advice: rather than only eating less salt, the goal becomes replacing some high-sodium foods with potassium-rich whole foods.

What the 2025 Meta-Analysis Adds

A 2025 meta-analysis quoted in the report gives the effect a concrete size. Among people with hypertension, adding about 2,000 mg of potassium per day was associated with roughly 5 mmHg lower systolic blood pressure and about 3 mmHg lower diastolic blood pressure. Those are meaningful changes at a population level, though experts caution that individual response varies with medications, genetics and age.

Where the DASH Diet Fits

The American Heart Association currently suggests 3,500–5,000 mg of potassium daily for blood-pressure management and no more than 2,300 mg of sodium per day, with an ideal target near 1,500 mg for many adults. The DASH eating plan aligns with those figures because it emphasizes fruits, vegetables, legumes, low-fat dairy and other potassium-rich foods while limiting processed items that carry hidden sodium.

Who Should Not Add Potassium Without Guidance

For most adults, food-based potassium is beneficial, but the balance can become dangerous for people with chronic kidney disease, heart failure, chronic hyperkalemia or those taking ACE inhibitors. In those groups, excess potassium can trigger serious arrhythmias, so experts recommend discussing any increase with a physician or dietitian before making changes.

Dietary Steps for Most Adults—and Who Needs a Doctor First

The useful takeaway is not simply to eat more bananas. It is to shift the overall dietary pattern toward potassium-rich whole foods while cutting the hidden sodium in packaged and restaurant meals. For most adults without the conditions listed above, the following steps reflect the expert guidance in the report.

  • Start with a food journal or app. Renal dietitian Jen Hernandez suggests estimating current potassium and sodium intake first, then bringing that information to a doctor or dietitian to set specific goals.
  • Target hidden sodium, not just the salt shaker. Most excess sodium comes from restaurant meals, canned and frozen foods, packaged breads and snacks. Compare labels and choose lower-sodium versions of those products.
  • Add potassium through whole foods. Useful sources include a medium baked potato with skin at about 919 mg, half a cup of cooked spinach at about 591 mg, half a cup of pinto beans at about 373 mg, plus white beans, lentils, plain yogurt, salmon, edamame and cantaloupe. Experts prefer food over supplements for most people.
  • Use the AHA numeric targets as a frame. Aim for 3,500–5,000 mg of potassium daily and no more than 2,300 mg of sodium, with an ideal goal near 1,500 mg for many adults with high blood pressure.
  • Expect a delayed response and keep checking blood pressure. Potassium’s benefit may take one to two weeks to begin and a few weeks to stabilize, and it varies by medication, genetics and age. Dietary changes are a complement to medication, not a replacement.
  • Get medical clearance before increasing potassium if you have kidney disease, heart failure, high blood potassium or take ACE inhibitors. These groups face a risk of dangerous arrhythmias and should not raise intake on their own.