DASH Diet Safe for Blood Pressure Patients on Medications

New preliminary research presented at the American Heart Association's Hypertension Scientific Sessions 2026 in Arlington, Virginia, offers reassuring news for adults with high blood pressure who follow the Dietary Approaches to Stop Hypertension (DASH) diet while taking common medications. The study found that increased consumption of potassium-rich foods—such as fruits, vegetables, whole grains, nuts, and low-fat dairy—did not raise blood potassium to dangerous levels in people taking blood pressure medications like ACE inhibitors, ARBs, potassium-sparing diuretics, and beta blockers, as well as non-steroidal anti-inflammatory drugs (NSAIDs). These medications are known to potentially increase potassium levels, which can lead to hyperkalemia, a condition that can disrupt heart rhythm and is particularly risky for those with chronic kidney disease.

The analysis drew from the GoFresh and GoFreshRx randomized trials, which enrolled 356 Black adults in the greater Boston area with high blood pressure, average age 53, and 70% women. Half received three months of weekly DASH-patterned groceries and nutrition counseling, while the other half received a cash stipend to buy their own groceries. Blood potassium levels were measured at baseline and after 12 weeks. The DASH grocery intervention provided approximately 4,700 mg of potassium per day with a 2:1 potassium-to-sodium ratio. Results showed no significant increase in potassium levels in either group, and no differences among subgroups taking various medications. The findings suggest that the DASH diet can be safely prescribed to a wide range of people, though the authors note limitations, including the exclusion of those with stage 4 or 5 kidney disease or elevated baseline potassium, and the study's focus on Black individuals in Boston. Future research should confirm these results in populations with suboptimal kidney function and higher baseline potassium levels.

This research was supported by the American Heart Association and presented as an abstract, meaning it is not yet peer-reviewed. The DASH diet aligns with the Association's 2026 Dietary Guidance to Improve Cardiovascular Health. Experts like Kevin Volpp, M.D., Ph.D., emphasize the importance of managing potassium levels for heart function, and the study provides assurance that the DASH diet is safe for many patients on medications that might otherwise raise potassium. The findings are considered preliminary until published in a peer-reviewed journal.