Label snapshot
What the product contains and what one serving costs, according to our catalog. Label amounts are not personal dose recommendations.
| Ingredient | Amount per serving |
|---|---|
| Folate (5-MTHF) | 400 µg |
Amounts are per label serving as recorded in the catalog and are not a recommendation. Testing status reflects what the brand lists. Nothing here is medical advice.
These calculations describe our scoring method. They are not a recommended dose or proof of benefit from this product.
Evidence gates dose: the evidence grade sets the ceiling, and the dose decides how much of that ceiling the product reaches. Value = inverse of price-per-trial-dose-day. Community = mean sentiment of external reviews. Safety caps applied after weighting.
This score is our editorial judgment, not a scientific standard. We combine published evidence, dose, price, transparency, and consumer signals into one composite: this is our method, not a peer-reviewed clinical rating. A higher score means a product does better on the factors we weight, not that it is medically proven to work.
This Jarrow Formulas Jarrow Formulas Methyl Folate, 400 mcg scores 6.7, making it a mid-tier product with both strengths and weaknesses. It delivers 0mg of Folate (5-MTHF), inside the studied range of 0–1mg with grade B evidence (promising human data, not yet comprehensive). The quality transparency (5.0) is limited by the lack of third-party testing. At $0.20/day it's priced well for what you get.
The science behind each active ingredient, independent of which brand sells it.
The active form of folate; better for those with MTHFR variants.
The specific product: dose, price, transparency, and what buyers report.
Safety flags, transparency gaps, dosing concerns, and recurring buyer complaints.
The main ingredients of this product, in plain language.
The active form of folate; better for those with MTHFR variants.
Read about Folate (5-MTHF) →Hard numbers and independently checked status. Expand each block for its source.
All product data is checked against original sources. Prices, doses, and testing status are updated when product pages change. Evidence grades are reviewed when new human RCTs are published. Read how we verify.
4.0 out of 5 across 6 verified reviews on 4 platforms.
Medium confidenceAuto-gathered from public review platforms via pplx_sdk fetch.
6 reviews · 4.0/5 · positive sentiment
Jarrow Formulas holds a positive but small-sample Trustpilot rating in the UK.
Compiled from Trustpilot listing located during research; verified at build time.
positive sentiment
Amazon reviewers report effective folate level improvements with good tolerability.
Compiled from Amazon listing located during research; verified at build time.
positive sentiment
iHerb reviewers, including those using it during pregnancy, report a positive experience with good bioavailability.
Compiled from iHerb listing located during research; verified at build time.
3 threads discussed · positive sentiment
some caution around high-dose folate causing anxiety symptoms
MTHFR and B12-deficiency communities widely recommend Jarrow's methyl folate, while cautioning about proper dosing.
Compiled from Reddit listing located during research; verified at build time.
These are consumer sentiment signals. They do not measure whether the product actually works. See our evidence section for that.
No external reviews aggregated yet for this product.
Published evidence, claim checks, regulatory status and what could not be verified.
No landmark studies linked yet. See the ingredient pages for the full evidence breakdown.
Standalone active-folate (5-MTHF) capsule using the well-known Quatrefolic patented form, a reasonable methyl-donor building block for MTHFR-conscious buyers, sold standalone rather than only in B-complex blends.
If you are the manufacturer or brand owner of Jarrow Formulas Methyl Folate, 400 mcg and believe any data on this page is incorrect (wrong dose, wrong ingredient, wrong price, missing certification, outdated status), you can request a correction.
We review every request, verify it against primary sources, and publish any accepted change with a dated note. Corrections from brand owners are treated the same as corrections from anyone else: verified before they move.
Request a correction →The next highest-scoring products in Methyl donor, same scoring method, same rules.
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Jarrow FormulasStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Jarrow FormulasStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Jarrow FormulasStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Jarrow FormulasStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.
Jarrow FormulasStatus as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.
Editorial score, not proof that this product works. Research-dose calculations are not dosing advice.