Douglas Laboratories Liquid Magnesium
vs
Protocol For Life Magnesium Citrate Plus Glycinate & Malate Forms
Supplement Comparison

  • Magnesium: Protocol For Life Magnesium Citrate Plus Glycinate & Malate Forms has 78% 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 Douglas Laboratories Liquid Magnesium vs Protocol For Life Magnesium Citrate Plus Glycinate & Malate Forms.

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Frequently asked questions

Which active ingredients does Douglas Laboratories Liquid Magnesium have?

  • Magnesium appears as Magnesium Citrate

Which active ingredients does Protocol For Life Magnesium Citrate Plus Glycinate & Malate Forms have?

  • Magnesium appears as Magnesium Citrate Glycinate Malate

Which categories do Douglas Laboratories Liquid Magnesium and Protocol For Life Magnesium Citrate Plus Glycinate & Malate Forms belong to?

  • Single Mineral

What health concerns do Douglas Laboratories Liquid Magnesium and Protocol For Life Magnesium Citrate Plus Glycinate & Malate Forms address?

  • Muscle Support
  • Heart & Cardiovascular Health
  • Joint & Bone Health
  • Sleep Quality
  • Stress Management
  • Athletic Performance
  • Digestive Support

Which product has a higher amount of Magnesium per serving?

  • Protocol For Life Magnesium Citrate Plus Glycinate & Malate Forms has the highest total amount of Magnesium: 400 mg per serving

How do the serving sizes compare between the two supplements?

  • Serving size:
    • Douglas Laboratories Liquid Magnesium: 5 ml
    • Protocol For Life Magnesium Citrate Plus Glycinate & Malate Forms: 3 softgels

Last updated: February 9, 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