For millions of adults managing high blood pressure with medications that can elevate potassium, the Dietary Approaches to Stop Hypertension (DASH) diet has long been a recommended lifestyle intervention. However, concerns have lingered that its emphasis on potassium-rich foods—fruits, vegetables, whole grains, nuts, and low-fat dairy—might trigger hyperkalemia, a potentially dangerous condition that can disrupt heart rhythm, especially in those taking ACE inhibitors, angiotensin receptor blockers (ARBs), potassium-sparing diuretics, beta blockers, or non-steroidal anti-inflammatory drugs (NSAIDs). Preliminary research presented at the American Heart Association’s Hypertension Scientific Sessions 2026 now offers strong reassurance: the DASH diet did not raise blood potassium to unsafe levels in this population.
The study, a secondary analysis of the GoFresh and GoFreshRx randomized trials, examined 356 Black adults in the greater Boston area with high blood pressure, half of whom received three months of DASH-patterned groceries and nutrition counseling, while the other half received a monetary stipend to buy their own groceries. Blood potassium levels were measured at baseline and after 12 weeks. Among those on the DASH grocery intervention, average serum potassium remained normal, with no significant increases regardless of medication class. “Knowing that the DASH diet did not increase blood potassium levels in this population with normal baseline potassium levels provides assurance that the DASH diet can be prescribed to a wide range of people,” said Marian Budu, M.B.B.S., M.P.H., presenting author and clinical research coordinator at Beth Israel Deaconess Medical Center.
The findings are particularly important because hyperkalemia can be life-threatening, and many patients and clinicians may avoid potassium-rich diets out of caution. Kevin Volpp, M.D., Ph.D., a volunteer expert with the American Heart Association and scientific lead of the Association’s Health Care by Food initiative, noted, “This follow-up study is important because it confirms that significant increases in potassium did not occur with the DASH diet, even for patients on medications that might contribute to increased potassium levels.” The DASH diet aligns with the American Heart Association’s 2026 Dietary Guidance to Improve Cardiovascular Health, which underscores the importance of dietary patterns in managing blood pressure.
While the study excluded individuals with stage 4 or 5 kidney disease or elevated baseline potassium, and was limited to Black adults in Boston, the results suggest that the DASH diet can be safely recommended more broadly. The authors call for future research in populations with suboptimal kidney function and higher baseline potassium. As hypertension remains a leading risk factor for heart disease and stroke, this study reinforces that a proven dietary approach can be implemented without fear of potassium-related harm, potentially improving blood pressure control and cardiovascular outcomes. The abstract will be published in the Hypertension Scientific Sessions 2026 Supplement of the Hypertension journal. For more information on potassium and heart health, see the American Heart Association’s A Primer on Potassium. Additional resources include prior news releases such as Following 9 key steps for a lifetime of eating well can support heart health and Reducing sodium in everyday foods may yield heart-health benefits across populations. The original release is available at www.newmediawire.com.
