Life Extension Magnesium Caps
vs
Douglas Laboratories Magnesium Citrate
Supplement Comparison

  • Magnesium: Life Extension Magnesium Caps has 3.3× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 2 nutrients compared
Bar chart: per-serving label amounts and listed forms for Life Extension Magnesium Caps vs Douglas Laboratories Magnesium Citrate.

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Frequently asked questions

Which active ingredients does Life Extension Magnesium Caps have?

  • Magnesium appears as Magnesium Oxide, Citrate and Succinate

Which active ingredients does Douglas Laboratories Magnesium Citrate have?

  • Magnesium appears as Magnesium Citrate

Which categories do Life Extension Magnesium Caps and Douglas Laboratories Magnesium Citrate belong to?

  • Single Mineral

What health concerns do Life Extension Magnesium Caps and Douglas Laboratories Magnesium Citrate address?

  • Muscle Support
  • Energy & Metabolism
  • General Health
  • Heart & Cardiovascular Health
  • Joint & Bone Health
  • Sleep Quality
  • Stress Management

Which product has a higher amount of Magnesium per serving?

  • Life Extension Magnesium Caps has the highest total amount of Magnesium: 500 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Life Extension Magnesium Caps: 1 capsule
    • Douglas Laboratories Magnesium Citrate: 1 capsule

Last updated: February 13, 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