Klean Athlete Klean Essential Aminos +HMB
vs
Metagenics Bone Builder® with Magnesium
Supplement Comparison

  • Vitamin D: Metagenics Bone Builder® with Magnesium has 20% more
  • Calcium: Metagenics Bone Builder® with Magnesium 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
    • 13 nutrients compared
Bar chart: per-serving label amounts and listed forms for Klean Athlete Klean Essential Aminos +HMB vs Metagenics Bone Builder® with Magnesium.

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Frequently asked questions

Which active ingredients does Klean Athlete Klean Essential Aminos +HMB have?

  • Vitamin D appears as Cholecalciferol (D3)
  • Calcium appears as Calcium from myHMB® Calcium (HMB-Ca Monohydrate)
  • L-Glutamine
  • β-Hydroxy-β-Methylbutyrate (HMB) appears as myHMB® Calcium (HMB-Ca Monohydrate)
  • Blend appears as Amino9 Amino Blend (L-Leucine, L-Lysine, L-Threonine, L-Isoleucine, L-Valine, L-Phenylalanine, L-Methionine, L-Histidine, L-Tryptophan)

Which active ingredients does Metagenics Bone Builder® with Magnesium have?

  • Vitamin D appears as Cholecalciferol (D3)
  • Calcium appears as Calcium (MCHC, dicalcium phosphate)
  • Phosphorus appears as Phosphorus (MCHC, dicalcium phosphate)
  • Magnesium appears as Magnesium (citrate, aspartate, bis-glycinate)
  • Microcrystalline Hydroxyapatite Concentrate (MCHC)

Which categories do Klean Athlete Klean Essential Aminos +HMB and Metagenics Bone Builder® with Magnesium belong to?

  • Protein and Branched-chain Amino Acids
  • Sports Formula
  • Joint Formula

What health concerns do Klean Athlete Klean Essential Aminos +HMB and Metagenics Bone Builder® with Magnesium address?

  • Athletic Performance
  • Muscle Support
  • Recovery & Repair
  • Joint & Bone Health
  • Sleep Quality
  • Stress Management

Which product has a higher amount of Vitamin D per serving?

  • Metagenics Bone Builder® with Magnesium has the highest total amount of Vitamin D: 600 IU per serving

Which product has a higher amount of Calcium per serving?

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

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Klean Athlete Klean Essential Aminos +HMB: 1 scoop
    • Metagenics Bone Builder® with Magnesium: 3 tablets
  • Vitamin D
    • This supplement has 500 IU
    • Recommended Dietary Allowance in men: 600 IU
    • Recommended Dietary Allowance in women: 600 IU
    • Tolerable Upper Intake Level: 4000 IU
  • Calcium
    • This supplement has 210 mg
    • Recommended Dietary Allowance in men: 1000 mg
    • Recommended Dietary Allowance in women: 1000 mg
    • Tolerable Upper Intake Level: 2500 mg
  • Vitamin D
    • This supplement has 600 IU
    • Recommended Dietary Allowance in men: 600 IU
    • Recommended Dietary Allowance in women: 600 IU
    • Tolerable Upper Intake Level: 4000 IU
  • 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 350 mg
    • Recommended Dietary Allowance in men: 700 mg
    • Recommended Dietary Allowance in women: 700 mg
    • Tolerable Upper Intake Level: 4000 mg

Last updated: February 9, 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