NOW Foods Magtein
vs
NOW Foods Magnesium Glycinate with BioPerine
Supplement Comparison

  • Magnesium: NOW Foods Magnesium Glycinate with BioPerine has 39% more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 4 nutrients compared
Bar chart: per-serving label amounts and listed forms for NOW Foods Magtein vs NOW Foods Magnesium Glycinate with BioPerine.

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Frequently asked questions

Which active ingredients does NOW Foods Magtein have?

  • Magnesium appears as Magtein Magnesium L-Threonate

Which active ingredients does NOW Foods Magnesium Glycinate with BioPerine have?

  • Magnesium appears as Magnesium Bisglycinate
  • Black Pepper Fruit Extract appears as BioPerine Black Pepper Fruit Extract

Which categories do NOW Foods Magtein and NOW Foods Magnesium Glycinate with BioPerine belong to?

  • Single Mineral

What health concerns do NOW Foods Magtein and NOW Foods Magnesium Glycinate with BioPerine address?

  • Brain, Focus & Cognitive Function
  • General Health
  • Sleep Quality
  • Energy & Metabolism
  • Stress Management

Which product has a higher amount of Magnesium per serving?

  • NOW Foods Magnesium Glycinate with BioPerine has the highest total amount of Magnesium: 200 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • NOW Foods Magtein: 3 capsules
    • NOW Foods Magnesium Glycinate with BioPerine: 2 capsules

Last updated: February 14, 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