Potassium-Rich DASH Diet Did Not Raise Blood Potassium to Unsafe Levels in Adults on Blood Pressure Drugs

Blood potassium was measured at the start and after 12 weeks. Baseline averages were normal, 4.16 mmol/L in the grocery group and 4.18 in the stipend group.

What did they find?

Eating more potassium-rich DASH foods did not raise potassium to dangerous levels in people taking ACE inhibitors, ARBs, potassium-sparing diuretics, beta blockers or NSAIDs. There was no significant increase in either group, and levels in the grocery group did not differ between medication subgroups. Kevin Volpp of the University of Pennsylvania, who was not involved, said significant increases did not occur even for patients on medications, as News-Medical also reported.

Who should not read this as permission?

The limits are important. The study excluded people with stage 4 or 5 chronic kidney disease and anyone whose potassium was already above normal, and it covered only Black adults in the Boston area. The authors say future work should look at people with reduced kidney function and higher starting potassium.

Outside experts quoted by Medical News Today made the same point. One noted that 4,700 mg is hard to reach through food, and that most people eat roughly 2,000 to 3,000 mg a day; people with kidney disease, heart failure, diabetes or electrolyte problems were advised to get an individualised plan. The same expert suggested that most people aiming for 3,000 to 5,000 mg should do so through foods such as leafy greens, potatoes, legumes, bananas, avocados and salmon, rather than supplements.

This is reporting, not medical advice. Anyone taking blood pressure medication, or with kidney disease, should check with their clinician before making large changes to potassium intake or using salt substitutes. Peer-reviewed publication and trials in people with kidney impairment are what would turn this reassurance into guidance.