People mainly take Potassium Supplement for heart & lipids, performance. Based on 5 first-hand reports and 2 meta-analyses & systematic reviews in the medical literature. Ranked #1491 of 1,974 overall.
Of reports that state an outcome, 0% are positive.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
At least one meta-analysis, or 5+ randomized controlled trials. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: In short-term studies of relatively healthy persons, a moderate oral potassium supplement resulted in a small increase in circulating potassium levels and no change in renal function.
PubMed 27566636 ↗Conclusion: This effect is directly associated with the amount of potassium supplement. The findings support the campaigns in favour of an increase in dietary potassium intake to reduce cardiovascular risk.
PubMed 36839211 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
Verbatim quotes, shortened only — each links to the original discussion.
“I drank some liquid IV, took a potassium supplement and ate a banana and I'm feeling better than I did.”
“I ended up in the hospital with heart problems due to potassium supplements.”
“Supplementing with potassium is dangerous, especially without blood work. Even a slightly elevated potassium level can cause arrhythmia and worst cause a heart attack.”
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate