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Head-to-head evidence comparison — which supplement is right for you?
CoQ10 vs Niacin: CoQ10 has the stronger overall evidence (8 vs 6/10); they're alternatives for support heart health — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
CoQ10 wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
9 of 10 studies with measurable effects showed benefit.
Top outcomes
Verdict
Probably helps
6 of 11 studies with measurable effects showed benefit.
Top outcomes
100-300mg daily
With fatty meal
Ubiquinol (reduced form)
500-2000mg daily for lipid effects; 50-500mg for general health (the cited trials used 1,500 to 2,000 mg a day, none used 50 to 500 mg)
With food (reduces flush), Evening for lipid effects, Split doses for high amounts
Immediate-release niacin (nicotinic acid)
4-12 weeks
8-12 weeks
4-8 weeks
2-8 weeks
4-8 weeks
4-8 weeks
30-60 minutes after dose
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
Meta-analysis of 9 randomised trials with 1,021 women with polycystic ovary syndrome.
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%.
Niacin for primary and secondary prevention of cardiovascular events
The Cochrane database of systematic reviews (2017) · Meta analysis · n=39195
23 RCTs published between 1968 and 2015 with 39,195 participants were included. The median dose of niacin was 2 g/day.
Effect of lipid-lowering therapies on lipoprotein(a) levels: a comprehensive meta-analysis of randomized controlled trials
Atherosclerosis (2025) · Meta analysis · n=145314
145,314 subjects from 147 RCTs were included.
A terminal metabolite of niacin promotes vascular inflammation and contributes to cardiovascular disease risk
Nature medicine (2024) · Cohort
In a discovery cohort of 1,162 stable cardiac patients, niacin metabolism was associated with incident major adverse cardiovascular events.
CoQ10 has a higher evidence score (8/10 vs 6/10) and wins in 3 of 3 categories.
For support heart health, CoQ10 has a higher relevance score (80 vs 55).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
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The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.