Life Extension Magnesium Caps
vs
Douglas Laboratories Basic Minerals
Supplement Comparison

  • Magnesium: Life Extension Magnesium Caps has 2.5× more
  • The image below shows:
    • Side-by-side charts with label nutrient amounts, per serving
    • Nutrient forms as listed on the label
    • 24 nutrients compared
Bar chart: per-serving label amounts and listed forms for Life Extension Magnesium Caps vs Douglas Laboratories Basic Minerals.

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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 Basic Minerals have?

  • Calcium appears as Calcium Citrate
  • Iodine appears as Kelp
  • Magnesium appears as Magnesium Aspartate and Amino Acid Chelate
  • Zinc appears as L-OptiZinc Monomethionine
  • Selenium appears as Albion Amino Acid Complex
  • Copper appears as Copper Amino Acid Chelate
  • Manganese appears as Manganese Amino Acid Chelate
  • Chromium appears as Chromium Polynicotinate
  • Molybdenum appears as Molybdenum A.A. chelate
  • Potassium appears as Potassium Chloride
  • Boron appears as Boron Aspartate and Citrate
  • Vanadium appears as Vanadyl Sulfate

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

  • Single Mineral
  • Mineral Complex

What health concerns do Life Extension Magnesium Caps and Douglas Laboratories Basic Minerals 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 Basic Minerals: 3 capsules
  • Calcium
    • This supplement has 200 mg
    • Recommended Dietary Allowance in men: 1000 mg
    • Recommended Dietary Allowance in women: 1000 mg
    • Tolerable Upper Intake Level: 2500 mg
  • Iodine
    • This supplement has 75 mcg
    • Recommended Dietary Allowance in men: 150 mcg
    • Recommended Dietary Allowance in women: 150 mcg
    • Tolerable Upper Intake Level: 1100 mcg
  • Zinc
    • This supplement has 10 mg
    • Recommended Dietary Allowance in men: 11 mg
    • Recommended Dietary Allowance in women: 8 mg
    • Tolerable Upper Intake Level: 40 mg
  • Selenium
    • This supplement has 100 mcg
    • Recommended Dietary Allowance in men: 55 mcg
    • Recommended Dietary Allowance in women: 55 mcg
    • Tolerable Upper Intake Level: 400 mcg
  • Copper
    • This supplement has 1 mg
    • Recommended Dietary Allowance in men: 0.9 mg
    • Recommended Dietary Allowance in women: 0.9 mg
    • Tolerable Upper Intake Level: 10 mg
  • Manganese
    • This supplement has 10 mg
    • Adequate Intake in men: 2.3 mg
    • Adequate Intake in women: 1.8 mg
    • Tolerable Upper Intake Level: 11 mg

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.
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  • See an error? Report it through our Contact page.
  • Author: VIOscan Research Team