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Head-to-head evidence comparison — which supplement is right for you?
CoQ10 vs Methylfolate: CoQ10 has the stronger overall evidence (8 vs 6/10); they're alternatives for fertility support — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
CoQ10 wins 2 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
Likely helps
6 of 6 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (2)
Outcomes where both CoQ10 and Methylfolate have evidence — compare verdict strength side-by-side.
100-300mg daily
With fatty meal
Ubiquinol (reduced form)
400-800mcg daily
Morning with or without food, Consistent daily timing
L-Methylfolate (5-MTHF)
4-12 weeks
8-12 weeks
4-8 weeks
2-8 weeks
2-4 weeks
1-3 weeks
4-8 weeks
Days to weeks
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%.
Efficacy of B-vitamins and vitamin D therapy in improving depressive and anxiety disorders: a systematic review of randomized controlled trials
Nutritional neuroscience (2023) · Systematic review · n=2256
20 RCTs with 2,256 subjects with depression or anxiety, covering several B vitamins and vitamin D, not methylfolate alone.
Systematic Review and Meta-Analysis of L-Methylfolate Augmentation in Depressive Disorders
Pharmacopsychiatry (2022) · Meta analysis · n=6707
Nine articles (N=6,707 patients) were assessed qualitatively. The pooled analyses were smaller: three studies (N=483) and four studies (N=507).
Folic acid/methylfolate for the treatment of psychopathology in schizophrenia: a systematic review and meta-analysis
Psychopharmacology (2018) · Meta analysis · n=925
Ten RCTs with 925 patients were reviewed, of which two tested methylfolate (n = 96). Seven RCTs entered the meta-analysis.
Two randomised trials in people whose depression had not responded to an SSRI (PMID 23212058). In the first (148 patients), L-methylfolate at 7.5 mg a day for 30 days, then 15 mg, did no better than placebo. In the second (75 patients), 15 mg a day throughout beat placebo on response and symptom scores, with side effects no different from placebo. A meta-analysis found benefit only for methylfolate at 15 mg once daily added to an SSRI, with all evidence rated low or very low quality (PMID 29442609). The 800 mcg point comes from an open-label, non-randomised trial of 44 patients where adding methylfolate to an antidepressant improved PHQ-9 scores more by day 28 (40% vs 26%), but remission did not differ (PMID 39844190). No trial compared doses head to head, so no minimum or optimal dose is set.
AI-estimated from published studies. Interpret as directional guidance.
CoQ10 has a higher evidence score (8/10 vs 6/10) and wins in 2 of 3 categories.
For fertility support, Methylfolate has a higher relevance score (95 vs 90).
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.