DASH Diet Shows No Hyperkalemia Rise in Black Adults
A secondary analysis of two randomized trials found grocery-based DASH meals did not raise potassium levels among Black adults taking blood pressure medications.
Updated on Nov. 4, 2026 in Nutrition
Mean serum potassium did not significantly differ between participants receiving weekly DASH-patterned groceries and those using a self-directed diet after the intervention. The analysis covered 356 Black adults with high blood pressure from the Boston region.
Why it matters
The DASH diet is rich in potassium, which has raised concern about dangerously high potassium levels in people taking certain blood pressure drugs. The findings suggest that, in this group, the diet did not add meaningful hyperkalemia risk.
Among 356 Black adults (mean age 53, 70% women), potassium changed -0.03 mmol/L in the DASH grocery group versus 0.08 mmol/L in the self-directed group for ACE inhibitor or ARB users, a between-group difference of -0.05 mmol/L. The study excluded patients with stage 4 or 5 kidney disease, so the effect in that population is unresolved.
The players
Beth Israel Deaconess Medical Center
A Boston-based teaching hospital affiliated with Harvard Medical School, home to the clinical research coordinator involved in the study.
The details
Researchers conducted a secondary analysis of the GoFresh and GoFreshRx randomized trials. One group received weekly DASH-patterned groceries targeting 4,700 mg of daily potassium and a 2:1 potassium-to-sodium ratio, while the other received a monthly grocery stipend for three months. The result held regardless of baseline estimated glomerular filtration rate.
Timeline
Grocery intervention and self-directed comparison ran for 3 months.
Results were presented on November 4, 2026, at the AHA Hypertension Scientific Sessions.
Big Picture
Clinicians have long cautioned patients on ACE inhibitors and ARBs about high-potassium diets, and this analysis challenges whether that caution applies to the DASH diet for Black adults. The finding is a secondary analysis, so it refines rather than overturns current guidance.
Adults taking ACE inhibitors, ARBs, or other blood pressure medications may be considering DASH-style eating, and this study suggests the diet did not raise potassium in this group. Anyone with kidney disease should still consult a clinician, since stage 4 or 5 patients were excluded.
The takeaway
People on blood pressure medication can discuss DASH eating with their doctor, especially if kidney function is reduced. Routine potassium monitoring remains the safest approach for anyone with kidney concerns.
Further reading
Explore more on Nutrition to see how diet patterns like DASH affect heart health.
Source note: This article includes information reported by Healio.
