Source Naturals Cat's Claw Bark
vs
Metagenics Bone Builder
Supplement Comparison

  • Calcium: Metagenics Bone Builder has 6.0× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 7 nutrients compared
Bar chart: per-serving label amounts and listed forms for Source Naturals Cat's Claw Bark vs Metagenics Bone Builder.

Frequently asked questions

Which active ingredients does Source Naturals Cat's Claw Bark have?

  • Calcium appears as Calcium and dibasic calcium phosphate
  • Cat's Claw (Uncaria tomentosa) appears as Cat's Claw Bark

Which active ingredients does Metagenics Bone Builder have?

  • Calcium appears as Calcium (MCHC, dicalcium phosphate)
  • Phosphorus appears as Phosphorus (MCHC, dicalcium phosphate)
  • Microcrystalline Hydroxyapatite Concentrate (MCHC)

Which categories do Source Naturals Cat's Claw Bark and Metagenics Bone Builder belong to?

  • Herbal Extract
  • Joint Formula

What health concerns do Source Naturals Cat's Claw Bark and Metagenics Bone Builder address?

  • General Health
  • Immune System Support
  • Joint & Bone Health

Which product has a higher amount of Calcium per serving?

  • Metagenics Bone Builder has the highest total amount of Calcium: 620 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Source Naturals Cat's Claw Bark: 2 tablets
    • Metagenics Bone Builder: 3 tablets
  • Calcium
    • This supplement has 103 mg
    • Recommended Dietary Allowance in men: 1000 mg
    • Recommended Dietary Allowance in women: 1000 mg
    • Tolerable Upper Intake Level: 2500 mg
  • Calcium
    • This supplement has 620 mg
    • Recommended Dietary Allowance in men: 1000 mg
    • Recommended Dietary Allowance in women: 1000 mg
    • Tolerable Upper Intake Level: 2500 mg
  • Phosphorus
    • This supplement has 360 mg
    • Recommended Dietary Allowance in men: 700 mg
    • Recommended Dietary Allowance in women: 700 mg
    • Tolerable Upper Intake Level: 4000 mg

Last updated: January 3, 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.
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  • Author: VIOscan Research Team