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K8.5
Potassium Research
Probably helps
184 peer-reviewed studies
What the evidence says
Probably helps
Potassium helped in about half (9/14) of the studies that measured an effect — promising, but not unanimous.
Most evidence is from high-quality meta-analyses and randomised trials published 1965–2026 with a typical study size of 923 participants.
Based on 184 studies · 26 meta-analyses · 146 RCTs · 352,435 total participants
Confidence
High confidence
What the studies found
9helped4unclear1didn't help· 170 more without graded effect data
Energy & fatigueReduced fatigue from electrolyte balance · 1-2 weeks
Too few graded studies1 study
By the numbers
Pulled from 29 studies with measurable effects
Likely real effects
43%
across studies
People studied
352k
typical study: 923 people
Strongest designs
172
26 pooled, 146 randomised
Showed benefit
64%
9/14 studies
How long studies ran
3+ months
3
Populations Studied
General population4
General population and hypertensive populations1
Adults with hypertension1
Healthy adults1
Steady research
45 studies in the last 5 years · Latest meta-analysis: 2026
196519952026
1Blood pressure controlMeta-AnalysisCited 3×n=2,500 · very large study2025
This meta-analysis highlights the dose-response relationship between potassium supplementation and BP reduction, particularly in subjects with hypertension.
Granal M et al. · Clinical Kidney Journal (2025)
Dose-response analysis of RCTs from 2000-2024
Significant blood pressure reductions
Benefits most pronounced in hypertensive populations
2Meta-AnalysisCited 15×n=237,036 · very large study2024
Our study demonstrates significant positive associations between daily sodium intake (within the range of sodium intake between 2,000 and 7,500 mg/d), the sodium-potassium ratio, and risk of CVD and overall mortality, with women having stronger sodium-potassium ratio-mortality associations than men, and with the meta-analysis providing compelling support for the CVD associations.
17Blood pressure reductionMeta-AnalysisCited 113×n=923 · large study2020
Aerobic exercise, isometric training, low-sodium and high-potassium salt, comprehensive lifestyle modification, salt restriction, breathing-control, meditation and low-calorie diet also have obvious effects on BP reduction.
Fu J et al. · Journal of the American Heart Association (2020)
Among overweight and obese participants, low-calorie diet and low-calorie diet plus exercise could lower more BP than exercise.
Conclusions DASH might be the most effective intervention in lowering BP for adults with prehypertension to established hypertension.
Aerobic exercise, isometric training, low-sodium and high-potassium salt, comprehensive lifestyle modification, salt restriction, breathing-control, meditation and low-calorie diet also have obvious effects on BP reduction.
18Global mean potassium intakeMeta-AnalysisCited 48×n=104 · medium study2023
Global mean potassium intake (2.25 g/day) falls below current guideline recommended intake level of > 3.5 g/day, with only 14% (95% CI 11-17%) of the global population achieving guideline-target mean intake.
Reddin C et al. · European journal of nutrition (2023)
No clear effect
← WorseNo effectBetter →
Approximately 31% (95% CI, 30-41%) of global population included have an estimated potassium intake > 2.5 g/day, with 14% (95% CI 11-17%) above 3.5 g/day.
Global mean potassium intake (2.25 g/day) falls below current guideline recommended intake level of > 3.5 g/day, with only 14% (95% CI 11-17%) of the global population achieving guideline-target mean intake.
There was considerable regional variation, with lowest mean potassium intake reported in Asia, and highest intake in Eastern and Western Europe.
Both supplements demonstrated greater reductions in SBP for the general population at lower dosages and longer treatment durations.
Behers BJ et al. · Nutrients (2024)
Both supplements demonstrated greater reductions in SBP for the general population at lower dosages and longer treatment durations.
Future studies are needed to validate these findings and provide tailored recommendations.
These studies could investigate varying dosages over long-term follow-up to provide robust data on optimal dosages and treatment durations, as our findings were limited due to reliance on previously published trials.
20Obesity and metabolic syndrome riskMeta-AnalysisCited 61×2016
However, additional pertinent studies are needed to examine the underlying mechanism.
Cai X et al. · Nutrients (2016)
No clear effect
← WorseNo effectBetter →
The results of the pooled analysis and systematic review indicated that high potassium intake could not reduce the risk of obesity (pooled OR = 0.78; 95% CI: 0.61-1.01), while serum potassium and urinary sodium-to-potassium ratio was associated with obesity.
Potassium intake was associated with metabolic syndrome (pooled OR = 0.75; 95% CI: 0.50-0.97).
Nonlinear analysis also demonstrated a protective effect of adequate potassium intake on obesity and metabolic syndrome.