Natrol Biotin
vs
Source Naturals Vitamin K2 Advantage
Supplement Comparison

  • Calcium: Natrol Biotin has 4.8% more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 8 nutrients compared
Bar chart: per-serving label amounts and listed forms for Natrol Biotin vs Source Naturals Vitamin K2 Advantage.

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Frequently asked questions

Which active ingredients does Natrol Biotin have?

  • Vitamin B7 (Biotin) appears as D-Biotin
  • Calcium appears as DiCalcium Phosphate

Which active ingredients does Source Naturals Vitamin K2 Advantage have?

  • Vitamin K appears as Vitamin K1 Phytonadione
  • Vitamin K appears as Vitamin K2 Menaquinone-4 (MK-4)
  • Vitamin K appears as NattoMK-7 Vitamin K2 Menaquinone-7
  • Calcium appears as Calcium and dibasic calcium phosphate

Which categories do Natrol Biotin and Source Naturals Vitamin K2 Advantage belong to?

  • Single Vitamin
  • Single Mineral

What health concerns do Natrol Biotin and Source Naturals Vitamin K2 Advantage address?

  • Energy & Metabolism
  • Skin, Hair & Nail Health
  • Heart & Cardiovascular Health
  • Joint & Bone Health

Which product has a higher amount of Calcium per serving?

  • Natrol Biotin has the highest total amount of Calcium: 66 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Natrol Biotin: 1 tablet
    • Source Naturals Vitamin K2 Advantage: 1 tablet
  • Vitamin B7 (Biotin)
    • This supplement has 10000 mcg
    • Adequate Intake in men: 30 mcg
    • Adequate Intake in women: 30 mcg
    • Tolerable Upper Intake Level: Not established
  • Calcium
    • This supplement has 66 mg
    • Recommended Dietary Allowance in men: 1000 mg
    • Recommended Dietary Allowance in women: 1000 mg
    • Tolerable Upper Intake Level: 2500 mg
  • Vitamin K
    • This supplement has 2200 mcg
    • Adequate Intake in men: 120 mcg
    • Adequate Intake in women: 90 mcg
    • Tolerable Upper Intake Level: Not established
  • Calcium
    • This supplement has 63 mg
    • Recommended Dietary Allowance in men: 1000 mg
    • Recommended Dietary Allowance in women: 1000 mg
    • Tolerable Upper Intake Level: 2500 mg

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