Douglas Laboratories Amino-Iron
vs
Klean Athlete Klean Iron
Supplement Comparison

  • Iron: Klean Athlete Klean Iron has 50% 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 Douglas Laboratories Amino-Iron vs Klean Athlete Klean Iron.

Try the VIOscan dashboard demo for free

Build comparison charts in seconds – no signup or card needed

This is a free preview of the $9.99/month premium dashboard

Use the interactive demo with multivitamins samples

Try Free Demo

Frequently asked questions

Which active ingredients does Douglas Laboratories Amino-Iron have?

  • Iron appears as Iron amino acid chelate/complex

Which active ingredients does Klean Athlete Klean Iron have?

  • Iron appears as Ferronyl Iron

Which categories do Douglas Laboratories Amino-Iron and Klean Athlete Klean Iron belong to?

  • Single Mineral

What health concerns do Douglas Laboratories Amino-Iron and Klean Athlete Klean Iron address?

  • Energy & Metabolism
  • General Health

Which product has a higher amount of Iron per serving?

  • Klean Athlete Klean Iron has the highest total amount of Iron: 27 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Douglas Laboratories Amino-Iron: 1 tablet
    • Klean Athlete Klean Iron: 1 tablet
  • Iron
    • This supplement has 18 mg
    • Recommended Dietary Allowance in men: 8 mg
    • Recommended Dietary Allowance in women: 18 mg
    • Tolerable Upper Intake Level: 45 mg
  • Iron
    • This supplement has 27 mg
    • Recommended Dietary Allowance in men: 8 mg
    • Recommended Dietary Allowance in women: 18 mg
    • Tolerable Upper Intake Level: 45 mg

Last updated: February 21, 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