Jarrow Formulas Methyl Folate, 400 mcg
How we scored this product Show the full breakdown
Bevisning 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. Säkerhet 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.
Question 1
Does the molecule work?
Does the molecule work?
The science behind each active ingredient, independent of which brand sells it.
The active form of folate; better for those with MTHFR variants.
Question 2
Is this bottle good?
Is this bottle good?
The specific product: dose, price, transparency, and what buyers report.
Question 3
What's the catch?
What's the catch?
Säkerhet flags, transparency gaps, dosing concerns, and recurring buyer complaints.
Quick verdict
The numbers
Data verification
Per-ingredient breakdown
All product data is checked against original sources. Prices, doses, and testing status are updated when product pages change. Bevisning grades are reviewed when new human RCTs are published. Read how we verify.
What's inside
Consumer signals
Consumer signals gathered from 4 platforms.
Medium confidenceConsumer sentiment compiled from 4 public sources.
6 reviews · 4.0/5 · positive sentiment
Compiled from Trustpilot listing located during research; verified at build time.
positive sentiment
Compiled from Amazon listing located during research; verified at build time.
positive sentiment
Compiled from iHerb listing located during research; verified at build time.
3 threads discussed · positive sentiment
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.
What others say (unverified)
No external reviews aggregated yet for this product.
Research behind this product
No landmark studies linked yet. See the ingredient pages for the full evidence breakdown.
Redaktionellt notes
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.
Why this scored this way
This Jarrow Formulas Jarrow Formulas Methyl Folate, 400 mcg scores 7.2, making it a mid-tier product with both strengths and weaknesses. It delivers the full 0.4mg trial dose of Folate (5-MTHF) 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.
What drives the score up
- Dose-evidence score of 8.0 reflects good alignment with trial doses.
- Value score of 9.9 at $0.20/day.
- Folate (5-MTHF) is dosed at the full research level with grade B evidence (promising human data, not yet comprehensive).
What drags it down
- No third-party testing, which caps the quality transparency.
- Quality transparency of 5.0 is below the site average.
- Limited consumer feedback (community score: 6.0).
Why you'd choose it
- You want good value at $0.20/day.
- You want Folate (5-MTHF) from a Jarrow Formulas product.
- You want doses that align with published research.
Why you might skip it
- You want third-party verified purity.
- You want a product with a publicly available CoA.
- You want stronger transparency (this scores 5.0).
Where this sits
Spot an error?
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 primär sources, and publish any change with a dated note in the version history above. Corrections from brand owners are treated the same as corrections from anyone else: verified before they move.
Request a correction →Similar produkter
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