The Study
Effect of increased potassium intake on cardiovascular risk factors and disease: systematic review and meta-analyses
This study is like checking a bunch of different experiments where people ate more bananas and potatoes — it found that for adults with high blood pressure, eating more potassium really does lower their blood pressure. But for heart attacks or strokes, it only shows that people who eat more potassium tend to have fewer strokes — we can't say for sure it caused it.
Analysis score
Maximum 100 for a systematic review with meta-analysis.
Where the score came from
Eating more potassium-rich foods like bananas and spinach helps lower blood pressure in adults who already have high blood pressure, and it might help prevent strokes.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 548 / 100
Quality score
The highest quality evidence. Systematic reviews and meta-analyses that pool randomized controlled trials, giving the most reliable summary of experimental evidence.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — a 3.5 mm Hg drop in systolic BP can reduce stroke risk by up to 10%, and a 24% lower stroke risk is a meaningful public health benefit.
- 2Blood pressure dropped by 3.5 mm Hg (systolic) and 2 mm Hg (diastolic) in adults with high BP.
- 3Stroke risk went down by 24%.
- 4No benefit in kids.
- 5Best results at 90–120 mmol/day.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
The BMJ
Year
2013
Authors
Nancy J. Aburto, Sarah Hanson, H. Gutierrez, L. Hooper, P. Elliott, F. Cappuccio
Related Content
Claims (6)
Eating more potassium-rich foods like bananas and spinach can help lower your blood pressure and make it less likely you'll have a stroke or heart problem—especially if you're eating a lot of salty foods.
People who eat more potassium-rich foods like bananas and spinach tend to have a 24% lower chance of having a stroke for the first time, but we can’t say for sure that potassium is the reason why.
Eating the right amount of potassium—between 90 and 120 millimoles a day—seems to lower your blood pressure the most and cut your risk of stroke the most; eating more than that doesn’t help any further.
Eating more potassium doesn’t seem to lower kids’ blood pressure much—if at all—and we just don’t have enough solid info to be sure.
Eating more potassium can lower blood pressure in people who already have high blood pressure, but it doesn’t help people with normal blood pressure — so it’s like a targeted fix just for those who need it.
Eating more potassium-rich foods won’t hurt your heart health by messing with your cholesterol, stress hormones, or kidney function — so it’s probably safe if you’re trying to lower your risk of heart problems.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.