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Best Folate Supplements (2026)
Clinical dose: 400-800mcg daily for general health; 400-800mcg before conception and during pregnancy for neural tube defect prevention; people with MTHFR variants may need 400-1,000mcg L-methylfolate
Bottom line
In our scoring, Folate / Methylfolate rates strong evidence: the research is strong for neural tube defect prevention. Our top-scored product is Pure Encapsulations Folate 400mcg (L-Methylfolate) (91/100), about $0.24 a day at a clinical dose of 400-800mcg daily for general health. Bottom line: worth it for the right goal. This is our opinion, not medical advice; talk to your clinician before starting.
Our Top Picks
Pure Encapsulations Folate 400mcg (L-Methylfolate)
$0.24/day at effective dose
Price checked 2026-08-07
Nature Made Folic Acid 400mcg
$0.02/day at effective dose
Price checked 2026-08-07
Thorne 5-MTHF 1mg (L-Methylfolate)
$0.40/day at effective dose
Price checked 2026-08-07
We earn commissions on purchases made through our links. This never influences our scores or recommendations. See our editorial policy.
What to know first
Folate is the rare supplement where the evidence is genuinely settled and the buying decision still is not obvious. The 400 to 800mcg daily target is one of the best-supported numbers in nutrition, with the CDC, WHO and ACOG all converging on it, particularly before conception and in early pregnancy. What is not settled for any individual buyer is which FORM to take, and that is the only question this page really answers.
Folic acid is the synthetic form used in the trials that established the benefit and in food fortification. Your body has to convert it using an enzyme called MTHFR, and roughly 40% of people carry a gene variant that makes that conversion less efficient. L-methylfolate is the already-converted form, so it skips that step entirely.
Here is the awkward part, and it is why this page exists: the folic acid here costs $0.02 a day and our top methylfolate costs $0.24, twelve times more, and without a genetic test you do not know which group you are in. For most people the cheap tablet is genuinely fine, and it is the highest-scoring product we tested.
For anyone with a known MTHFR variant, planning a pregnancy, or who simply wants the question settled, the extra twenty-two cents a day buys the form that works either way. One caution that applies to both: intakes above 1,000mcg a day can mask a vitamin B12 deficiency, so the higher-dose products here are not automatically the better ones. Our full folate scorecard grades each product separately.
The Verdict
Pure Encapsulations Folate 400 is our Top Pick at $0.24 a day. It is Metafolin L-methylfolate at exactly the 400mcg target, hypoallergenic, Eurofins-tested, and it scores 91. Nature Made Folic Acid is our Best Value at $0.02 a day, and it scores 93, the highest on this page, because it is USP Verified and costs almost nothing. That the Best Value outscores the Top Pick is deliberate rather than an oversight: Nature Made is the better-executed product and the right buy for most people, and it is only the wrong buy if you happen to be one of the roughly 40% who convert folic acid poorly, which you cannot know without a test.
Our Top Pick is therefore the pick for certainty, not the pick for everyone. Between the two, Bluebonnet at $0.21 a day is the cheapest methylfolate here and slightly undercuts our Top Pick at a higher 800mcg dose. Thorne at $0.40 and Seeking Health at $0.33 are both dosed at 1,000mcg, which is more than most people need and sits right at the level where B12 masking becomes a genuine consideration. The recommendation is unusually simple for this category: buy the two-cent tablet unless you have a specific reason not to, and if you do have that reason, buy the Pure Encapsulations.
Folic acid or methylfolate, and how to tell which you need
Folic acid is synthetic folate. It is what fortified flour and cereal contain and what the landmark trials used, so the evidence base sits on this form. Your body converts it to the active form using the MTHFR enzyme.
L-methylfolate is that active form, already converted. It skips the enzyme step, which is why it works the same whether or not your MTHFR enzyme is efficient.
Roughly 40% of people carry a variant that reduces that conversion. No symptom reliably tells you, and a genetic test is the only way to know. So the practical choice looks like this:
- Nature Made Folic Acid, 400mcg, $0.02 a day, USP Verified, scores 93. Our Best Value and the highest-scoring product here.
- Pure Encapsulations Folate 400, 400mcg Metafolin, $0.24 a day, scores 91. Our Top Pick, and the answer if you want the question closed.
- Bluebonnet, 800mcg Quatrefolic, $0.21 a day. The cheapest methylfolate on the page.
- Seeking Health, 1,000mcg at $0.33, and Thorne, 1,000mcg Metafolin at $0.40. Both above what most people need.
Metafolin and Quatrefolic are the two branded methylfolate ingredients worth recognising on a label, and both are the genuine article. The scorecard carries the full pillar breakdown for each.
Why more folate is not better
The target is 400 to 800mcg a day. Above roughly 1,000mcg, supplemental folate can mask a vitamin B12 deficiency: it corrects the anaemia that would otherwise reveal the deficiency while the nerve damage carries on underneath. That is a documented clinical concern rather than a theoretical one, and it is why the tolerable upper intake level for supplemental folate sits at 1,000mcg a day.
Two of the five products here are dosed at exactly that line: Thorne at $0.40 a day and Seeking Health at $0.33. Neither is a bad product, and both are entirely reasonable for someone whose clinician has recommended a higher dose, often for a documented MTHFR variant. They simply are not the default, and the pricing does not signal that, so you can end up paying more for a dose you did not need.
Whatever dose you land on, co-supplementing B12 is sensible, and it is worth clearing the timing with your doctor if you take methotrexate, which works by blocking folate.
What the Evidence Says About Folate / Methylfolate
How A-F grades work- ANeural tube defect prevention
- AHomocysteine reduction
- CCardiovascular disease prevention
- BDepression / antidepressant augmentation
- CCognitive decline prevention
A = strong RCT evidence · B = moderate · C = limited · D = weak · F = no evidence.
Detailed Reviews
Nature Made Folic Acid 400mcg
folic acid | 400mcg/serving | 250 servings
Price checked 2026-08-07
The most trusted, most affordable folic acid option. Appropriate for people who know they do not have MTHFR variants or who are on a tight budget. USP Verified quality.
Pure Encapsulations Folate 400mcg (L-Methylfolate)
L-methylfolate (Metafolin) | 400mcg/serving | 90 servings
Price checked 2026-08-07
Our top methylfolate pick: Metafolin form, Eurofins-tested, hypoallergenic, at a more reasonable per-day cost than the 1mg premium options. Also the best choice for people with food sensitivities.
Bluebonnet CellularActive Methylfolate 800 mcg
L-methylfolate (Quatrefolic) vegetable capsule | 800mcg/serving | 60 servings
Price checked 2026-08-07
Excellent value for 800mcg methylfolate. The 800mcg dose is convenient for pregnancy support without needing multiple capsules.
Also Scored
Thorne 5-MTHF 1mg (L-Methylfolate)
$0.40/day | L-methylfolate (Metafolin)
Price checked 2026-08-07
Full score breakdownSeeking Health L-Methylfolate 1mg (1,700 mcg DFE)
$0.33/day | L-methylfolate (L-5-MTHF)
Price checked 2026-08-07
Full score breakdownProduct prices and availability are accurate as of the date indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply.
What to Look For When Buying
- ✓400 to 800mcg a day is the target; more is not better, and above 1,000mcg supplemental folate can mask a B12 deficiency
- ✓Folic acid is the form used in the landmark trials and in fortified flour, and your body has to convert it
- ✓Roughly 40% of people carry an MTHFR variant that makes that conversion less efficient
- ✓L-methylfolate is pre-converted, so it works the same regardless of MTHFR status
- ✓Without a genetic test you cannot tell which group you are in, and that uncertainty is what the price gap actually buys
- ✓Metafolin and Quatrefolic are the two branded methylfolate ingredients worth recognising on a label
- ✓Co-supplement B12, and clear the timing with your doctor if you take methotrexate, which works by blocking folate
Our #1 Pick
Pure Encapsulations Folate 400mcg (L-Methylfolate)
Frequently Asked Questions
Folic acid vs methylfolate - which should I take?
If you know you have an MTHFR gene variant (C677T or A1298C), use L-methylfolate - it bypasses the impaired conversion step. If you don't know your MTHFR status and don't want to test, L-methylfolate is the safer choice as it works for everyone regardless of MTHFR status. Folic acid works well for people with normal MTHFR function and is cheaper. For pregnancy specifically, methylfolate is increasingly recommended because you want to ensure adequate active folate regardless of genetic status.
What is MTHFR and should I get tested?
MTHFR is a gene that encodes an enzyme critical for converting folic acid to the active methylfolate form. Common variants (C677T, A1298C) reduce enzyme efficiency. Testing is available through 23andMe, direct-to-consumer genetic testing, or your physician. Testing is particularly useful for women planning pregnancy and people with treatment-resistant depression or elevated homocysteine. If testing is not feasible, simply using L-methylfolate supplements covers all possibilities.
How much folate do pregnant women need?
The CDC and ACOG recommend 400-800mcg of folic acid (or equivalent methylfolate) daily starting at least 1 month before conception. Women with a previous pregnancy affected by a neural tube defect are advised to take 4,000mcg (4mg) per day, which requires a prescription-strength supplement. Most prenatal vitamins contain 400-1,000mcg. The critical window is the first 28 days after conception - often before a positive pregnancy test.
What is the difference between 'DFE' and 'mcg' on folate labels?
DFE stands for 'Dietary Folate Equivalents' - a unit accounting for the fact that synthetic folic acid is ~1.7x more bioavailable than naturally occurring food folate. 400mcg folic acid = 680mcg DFE. Labels from 2020 forward are required to list folate in mcg DFE. 400mcg of L-methylfolate = 400mcg DFE. When comparing products, use mcg DFE for an apples-to-apples comparison.
Can folate supplementation help with depression?
Possibly, particularly for people with MTHFR variants and low folate status. Clinical trials have used 15mg/day of L-methylfolate as an adjunct to antidepressants (Deplin is the prescription version). Studies show it particularly helps patients who have not responded adequately to SSRIs/SNRIs alone. At standard supplemental doses (400-800mcg), the antidepressant effect is less certain but correcting deficiency may improve baseline mood. This is not a standalone depression treatment.
Sources
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.