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Head-to-head evidence comparison — which supplement is right for you?
CoQ10 and Potassium are closely matched across evidence, studies, and safety.
100-300mg daily
With fatty meal
Ubiquinol (reduced form)
99-500mg daily from supplements (food provides more)
With food to reduce GI upset, Spread throughout day, During/after exercise for athletes
Potassium Citrate or Potassium Gluconate
2-4 weeks
4-8 weeks
8-12 weeks
2-4 weeks
1-2 weeks
Long-term
With excess or kidney issues
Efficacy and Safety of Coenzyme Q10 Supplementation in the Treatment of Polycystic Ovary Syndrome: a Systematic Review and Meta-analysis
Reproductive sciences (Thousand Oaks, Calif.) (2023) · Meta analysis · n=1021
Only one RCT reported adverse events, and they found that patients had no adverse effects or symptoms following supplementation.
Coenzyme Q10 for heart failure
The Cochrane database of systematic reviews (2021) · Meta analysis · n=1573
Coenzyme Q10 probably reduces the risk of all-cause mortality more than control (RR 0.58, 95% CI 0.35 to 0.95; 1 study, 420 participants; number needed to treat for an additional beneficial outcome (NNTB) 13.3; moderate-quality evidence).
Antioxidants for female subfertility
The Cochrane database of systematic reviews (2017) · Meta analysis · n=6510
This suggests that among subfertile women with an expected clinical pregnancy rate of 22%, the rate among women using antioxidants would be between 27% and 33%.
The effects of antidepressants on cardiometabolic and other physiological parameters: a systematic review and network meta-analysis
Lancet (London, England) (2025) · Meta analysis · n=534
We found strong evidence that antidepressants differ markedly in their physiological effects, particularly for cardiometabolic parameters.
Spironolactone in patients on chronic haemodialysis at high risk of adverse cardiovascular outcomes (ALCHEMIST): a multicentre, double-blind, randomised, placebo-controlled trial and updated meta-analysis
Lancet (London, England) (2025) · Meta analysis · n=1442
In patients with kidney failure on haemodialysis and with high risk of adverse cardiovascular outcomes, spironolactone did not reduce the incidence of major cardiovascular events.
Potassium binders for chronic hyperkalaemia in people with chronic kidney disease
The Cochrane database of systematic reviews (2020) · Meta analysis · n=688
Patiromer or sodium zirconium cyclosilicate may make little or no difference to death (any cause) (4 studies, 688 participants: RR 0.69, 95% CI 0.11, 4.32; I2 = 0%; low certainty evidence) in CKD.
Based on heart failure meta-analysis (n=1573) showing mortality reduction. Effectiveness conservative due to single primary study (n=420). Take with food to reduce GI upset. Ubiquinol forms may have better absorption.
AI-estimated from published studies. Interpret as directional guidance.
Both CoQ10 and Potassium are closely matched — the best choice depends on your specific health goals.
For reduce inflammation, Potassium has a higher relevance score (85 vs 55).
No known interactions between CoQ10 and Potassium have been documented in our database. However, always consult a healthcare provider before combining supplements.