Life Extension Neuro-Mag® Magnesium L-Threonate
vs
Life Extension Potassium with Extend-Release Magnesium
Supplement Comparison

  • Magnesium: Life Extension Potassium with Extend-Release Magnesium has 74% 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 Life Extension Neuro-Mag® Magnesium L-Threonate vs Life Extension Potassium with Extend-Release Magnesium.

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Frequently asked questions

Which active ingredients does Life Extension Neuro-Mag® Magnesium L-Threonate have?

  • Magnesium appears as Magtein Magnesium L-Threonate

Which active ingredients does Life Extension Potassium with Extend-Release Magnesium have?

  • Magnesium appears as ZümXR magnesium oxide and magnesium citrate
  • Potassium appears as Potassium Chloride

Which categories do Life Extension Neuro-Mag® Magnesium L-Threonate and Life Extension Potassium with Extend-Release Magnesium belong to?

  • Single Mineral
  • Mineral Complex

What health concerns do Life Extension Neuro-Mag® Magnesium L-Threonate and Life Extension Potassium with Extend-Release Magnesium address?

  • Brain, Focus & Cognitive Function
  • Men's Health
  • Sleep Quality
  • Muscle Support
  • Heart & Cardiovascular Health
  • Joint & Bone Health
  • Stress Management

Which product has a higher amount of Magnesium per serving?

  • Life Extension Potassium with Extend-Release Magnesium has the highest total amount of Magnesium: 250 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Life Extension Neuro-Mag® Magnesium L-Threonate: 3 capsules
    • Life Extension Potassium with Extend-Release Magnesium: 1 capsule
  • Potassium
    • This supplement has 99 mg
    • Adequate Intake in men: 3400 mg
    • Adequate Intake in women: 2600 mg
    • Tolerable Upper Intake Level: Not established

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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  • Author: VIOscan Research Team