Natural Factors OsteoMove® Extra Strength Joint Care
vs
Douglas Laboratories Free Form Amino Caps
Supplement Comparison

  • Blend: Douglas Laboratories Free Form Amino Caps has 3.0× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 18 nutrients compared
Bar chart: per-serving label amounts and listed forms for Natural Factors OsteoMove® Extra Strength Joint Care vs Douglas Laboratories Free Form Amino Caps.

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Frequently asked questions

Which active ingredients does Natural Factors OsteoMove® Extra Strength Joint Care have?

  • Manganese appears as Manganese Sulfate Monohydrate
  • Sodium
  • Potassium
  • Boron appears as Sodium Tetraborate
  • Turmeric
  • Boswellia
  • Methylsulfonylmethane (MSM)
  • Glucosamine Sulfate appears as Glucosamine Sulfate (shellfish)
  • Chondroitin Sulfate appears as Chondroitin Sulfate (bovine cartilage)
  • Collagen Peptides appears as Hydrolyzed Collagen Type II (Gallus gallus cartilage)
  • Hyaluronic Acid
  • Blend appears as OsteoMove Ultra Fruit Polyphenol Complex (grape extract, cranberry concentrate, blueberry concentrate, bilberry concentrate, pomegranate concentrate, raspberry concentrate, strawberry concentrate)

Which active ingredients does Douglas Laboratories Free Form Amino Caps have?

  • Blend appears as Free Form Amino Acids Proprietary Blend (18 essential and non-essential amino acids)

Which categories do Natural Factors OsteoMove® Extra Strength Joint Care and Douglas Laboratories Free Form Amino Caps belong to?

  • Joint Formula
  • Amino Acid Formula

What health concerns do Natural Factors OsteoMove® Extra Strength Joint Care and Douglas Laboratories Free Form Amino Caps address?

  • Anti-Inflammatory Support
  • Joint & Bone Health
  • Recovery & Repair
  • Athletic Performance
  • Energy & Metabolism

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Natural Factors OsteoMove® Extra Strength Joint Care: 2 tablets
    • Douglas Laboratories Free Form Amino Caps: 1 capsule
  • Manganese
    • This supplement has 1.5 mg
    • Adequate Intake in men: 2.3 mg
    • Adequate Intake in women: 1.8 mg
    • Tolerable Upper Intake Level: 11 mg
  • Sodium
    • This supplement has 70 mg
    • Adequate Intake in men: 1500 mg
    • Adequate Intake in women: 1500 mg
    • Tolerable Upper Intake Level: Not established
  • Potassium
    • This supplement has 330 mg
    • Adequate Intake in men: 3400 mg
    • Adequate Intake in women: 2600 mg
    • Tolerable Upper Intake Level: Not established

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