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Zahler Methylfolate supplement bottle
Zahler

Methylfolate Review

What We Researched
1 active ingredient analyzed · 3 inactive ingredients decoded · 3 brand certifications checked · Page generated: Sep 2026
100
Product Score Excellent
81
Brand Score Good

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Folate (as Quatrefolic® (6S)-5-Methyltetrahydrofolic Acid, Glucosamine Salt) 1000 mcg 250%
Bioavailability Excellent

Absorption Rating

  • Folate (as Quatrefolic® (6S)-5-Methyltetrahydrofolic Acid, Glucosamine Salt) Good
Other Ingredients Excellent

Fillers & Additives

  • Vegetable cellulsoe (capsule)
  • Microcrystalline Cellulose
  • Magnesium Stearate and Silicon Dioxide
Efficacy Excellent

Dosage Analysis

  • Folate (as Quatrefolic® (6S)-5-Methyltetrahydrofolic Acid, Glucosamine Salt) 1000 mcg Effective

Supplement Facts

Ingredient Amount % Daily Value
Folate (as Quatrefolic® (6S)-5-Methyltetrahydrofolic Acid, Glucosamine Salt) 1000 mcg 250%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Vegetable cellulsoe (capsule) Unknown
Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Magnesium Stearate and Silicon Dioxide Generally_safe

They are added to improve manufacturing by preventing ingredients from sticking to machinery and improving powder flow.

Brand Trust Report
Zahler

Founded 2005 · Brooklyn, NY, USA · 174 products · zahlers.com/

Certifications

3 certifications
Fda Gmp Inspections Source available Primary evidence
Kosher Certified Source available Primary evidence
NSF Certified Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Claimed Evidence available Evidence
In House Testing — Verified Evidence available Evidence
Testing Lab Disclosure — True Brand claim; evidence unavailable
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

4 incidents
Prop 65 Lead2023-08-28 Source available Primary source
Lawsuit Trademark Infringement2022 Source available Primary source
Prop 65 Lead2021-12-09 Source available Primary source
Fda Warning A retailer was cited for making drug claims about a Zahler product.2017-04-17 Source available Primary source
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Frequently Asked Questions
Is Zahler Methylfolate a good supplement?

Zahler Methylfolate received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 60 servings per container. Of the 3 inactive ingredients, 2 are rated safe and 0 ingredients are flagged for review. The manufacturer, Zahler, holds a brand trust score of 81/100.

What are the ingredients in Zahler Methylfolate?

Zahler Methylfolate contains 1 active ingredients: Folate (as Quatrefolic® (6S)-5-Methyltetrahydrofolic Acid, Glucosamine Salt) (1000 mcg). Notable high-dose ingredients include Folate at 250% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Zahler Methylfolate safe to take?

GoodSupp reviewed the inactive-ingredient data available for Zahler Methylfolate. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Zahler a trustworthy supplement brand?

Zahler receives a brand trust score of 81/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2005 and headquartered in Brooklyn, NY, USA, the company offers 174 products in their lineup. Note: Zahler has 4 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.