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Douglas Laboratories Methyl Folate, 1000 mcg Metafolin supplement bottle
Douglas Laboratories

Methyl Folate, 1000 mcg Metafolin Review

What We Researched
1 active ingredient analyzed · 5 inactive ingredients decoded · 6 brand certifications checked · Page generated: Sep 2026
93
Product Score Excellent
100
Brand Score Excellent

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 Metafolin® L-5-MTHF)(1,000 mcg L-5-MTHF) 1667 mcg DFE 417%
Bioavailability Excellent

Absorption Rating

  • Folate (as Metafolin® L-5-MTHF)(1,000 mcg L-5-MTHF) Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Dicalcium Phosphate
  • Croscarmellose Sodium
  • Stearic Acid
  • Vegetable Stearate and Silica
Efficacy Very Good

Dosage Analysis

  • Folate (as Metafolin® L-5-MTHF)(1,000 mcg L-5-MTHF) 1667 mcg DFE High

Supplement Facts

Ingredient Amount % Daily Value
Folate (as Metafolin® L-5-MTHF)(1,000 mcg L-5-MTHF) 1667 mcg DFE 417%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

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

Dicalcium Phosphate Safe

Serves as both a filler and a supplemental source of calcium and phosphorus.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Vegetable Stearate and Silica Generally_safe

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

Brand Trust Report
Douglas Laboratories

Founded 1955 · Pittsburgh, Pennsylvania, United States · 32 products · douglaslabs.com

Certifications

6 certifications
Consumerlab Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence
Nsf Certified For Sport Source available Primary evidence
Nsf Gmp Source available Primary evidence
Usda Organic Source available Primary evidence
NSF Certified Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Verified Evidence available Evidence
Coa Availability — Verified Evidence available Evidence
In House Testing — Verified Evidence available Evidence
Testing Lab Disclosure — True Brand claim; evidence unavailable

Violation History

2 incidents
Recall Douglas Labs Stress-B-Plus2024-10-07 Source available Primary source
Prop 65 Lead2008-10-22 Source available Primary source
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Frequently Asked Questions
Is Douglas Laboratories Methyl Folate, 1000 mcg Metafolin a good supplement?

Douglas Laboratories Methyl Folate, 1000 mcg Metafolin received a product quality score of 93/100 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. All 5 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Douglas Laboratories, holds a brand trust score of 100/100.

What are the ingredients in Douglas Laboratories Methyl Folate, 1000 mcg Metafolin?

Douglas Laboratories Methyl Folate, 1000 mcg Metafolin contains 1 active ingredients: Folate (as Metafolin® L-5-MTHF)(1,000 mcg L-5-MTHF) (1667 mcg DFE). Notable high-dose ingredients include Folate at 417% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Douglas Laboratories Methyl Folate, 1000 mcg Metafolin safe to take?

GoodSupp reviewed the inactive-ingredient data available for Douglas Laboratories Methyl Folate, 1000 mcg Metafolin. All 5 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. 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 Douglas Laboratories a trustworthy supplement brand?

Douglas Laboratories receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1955 and headquartered in Pittsburgh, Pennsylvania, United States, the company offers 32 products in their lineup. Note: Douglas Laboratories has 2 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.