Jarrow Methyl Folate
vs
Douglas Laboratories Methyl Folate 1,000 mcg Metafolin
Supplement Comparison

  • Vitamin B9 (Folate): Douglas Laboratories Methyl Folate 1,000 mcg Metafolin has 2.5× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 2 nutrients compared
Bar chart: per-serving label amounts and listed forms for Jarrow Methyl Folate vs Douglas Laboratories Methyl Folate 1,000 mcg Metafolin.

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Frequently asked questions

Which active ingredients does Jarrow Methyl Folate have?

  • Vitamin B9 (Folate) appears as Quatrefolic (6S)-5-MTHF Glucosamine Salt

Which active ingredients does Douglas Laboratories Methyl Folate 1,000 mcg Metafolin have?

  • Vitamin B9 (Folate) appears as Metafolin L-5-MTHF

Which categories do Jarrow Methyl Folate and Douglas Laboratories Methyl Folate 1,000 mcg Metafolin belong to?

  • Single Vitamin

What health concerns do Jarrow Methyl Folate and Douglas Laboratories Methyl Folate 1,000 mcg Metafolin address?

  • Brain, Focus & Cognitive Function
  • General Health
  • Methylation Support
  • Pregnancy Support
  • Immune System Support

Which product has a higher amount of Vitamin B9 (Folate) per serving?

  • Douglas Laboratories Methyl Folate 1,000 mcg Metafolin has the highest total amount of Vitamin B9 (Folate): 1667 mcg DFE per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Jarrow Methyl Folate: 1 capsule
    • Douglas Laboratories Methyl Folate 1,000 mcg Metafolin: 1 tablet
  • Vitamin B9 (Folate)
    • This supplement has 680 mcg DFE
    • Recommended Dietary Allowance in men: 400 mcg DFE
    • Recommended Dietary Allowance in women: 400 mcg DFE
    • Tolerable Upper Intake Level: 1000 mcg DFE
  • Vitamin B9 (Folate)
    • This supplement has 1667 mcg DFE
    • Recommended Dietary Allowance in men: 400 mcg DFE
    • Recommended Dietary Allowance in women: 400 mcg DFE
    • Tolerable Upper Intake Level: 1000 mcg DFE

Last updated: February 20, 2026

  • Sources & Methodology: Nutrient data and forms are taken directly from Supplement Facts labels. Reviewed and standardized by the VIOscan Research Team. Learn more on the Methodology page.
  • We show the Recommended Dietary Allowance (RDA) when available. If no RDA exists, we show the Adequate Intake (AI). Tolerable Upper Intake Levels (UL) are used for upper limits. Unless otherwise noted, RDAs shown correspond to healthy adults aged 19–50 years and are sex-specific. Separate values exist for 51–70 years and >70 years, and pregnancy and lactation are excluded. All values come from the Dietary Reference Intakes (DRIs) published by the National Academies of Sciences, Engineering, and Medicine (NASEM), Food and Nutrition Board (FNB).
  • Transparency: We’re funded by our users. We don’t have sponsors or affiliate links, and we don’t sell supplements.
  • Editorial standards: we provide independent, impartial and objective data analysis.
  • This analysis is for educational purposes only. It is not a substitute for medical advice.
  • Questions? Read our Frequently Asked Questions or contact us, we’re here to help.
  • See an error? Report it through our Contact page.
  • Author: VIOscan Research Team