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Head-to-head evidence comparison — which supplement is right for you?
Folic Acid vs Methylfolate: Methylfolate has the stronger overall evidence (6 vs 8/10); they're alternatives for prenatal support — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Methylfolate wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Too few graded studies
Top outcomes
Verdict
Likely helps
6 of 6 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (2)
Outcomes where both Folic Acid and Methylfolate have evidence — compare verdict strength side-by-side.
400 mcg/day for anyone planning or capable of pregnancy (USPSTF: 400-800 mcg); adult RDA 400 mcg DFE/day, 600 mcg DFE in pregnancy, 500 mcg DFE in lactation (IOM)
Any time of day
Folic acid (pteroylmonoglutamic acid)
400-800mcg daily
Morning with or without food, Consistent daily timing
L-Methylfolate (5-MTHF)
Periconceptional
Weeks
Weeks to months
2-4 weeks
1-3 weeks
4-8 weeks
Days to weeks
Prevention of the first occurrence of neural-tube defects by periconceptional vitamin supplementation.
N Engl J Med (1992) · Rct
Randomised trial of periconceptional vitamin supplementation for prevention of a FIRST neural tube defect (PubMed publication types: Randomized Controlled Trial, Clinical Trial)
Prevention of neural tube defects: results of the Medical Research Council Vitamin Study. MRC Vitamin Study Research Group.
Lancet (1991) · Rct
Randomised, multicentre trial of periconceptional folic acid for prevention of RECURRENT neural tube defects (PubMed publication types: Randomized Controlled Trial, Multicenter Study, Comparative Study)
Effects and safety of periconceptional oral folate supplementation for preventing birth defects.
Cochrane Database Syst Rev (2015) · Meta analysis
Cochrane Database of Systematic Reviews CD007950, third edition (PubMed publication types: Meta-Analysis, Systematic Review)
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.
Methylfolate has a higher evidence score (6/10 vs 8/10) and wins in 2 of 3 categories.
For prenatal support, Folic Acid has a higher relevance score (95 vs 70).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
Folate is essential; inositol + CoQ10 are the best bets — but conception evidence is limited.
Commonly recommended vs ask-your-clinician vs avoid — a general, safety-first overview.
CoQ10, zinc, selenium, carnitine modestly help sperm parameters — but live-birth evidence is weak.
Saffron, EPA omega-3, SAMe have real adjunct evidence — but these aren’t a substitute for care, and some interact dangerously.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.