Primary Research · 2001
Bioavailability of US commercial magnesium preparations
Firoz and Graber · Magnesium Research, 2001
Key finding
Magnesium oxide had ~4% absorption vs 33% for magnesium chloride/lactate/aspartate forms.
Read the paper
Open on PubMedhttps://pubmed.ncbi.nlm.nih.gov/11794633/
Cited in 2 guides
Roundup
Best Magnesium Supplements 2026, Ranked by Clinical Evidence
Learn which magnesium form actually matches your goal. We scored glycinate, threonate, and citrate on absorption, dose accuracy, and third-party testing.
Guide
Best Time to Take Magnesium: The Timing Science (2026)
Morning, evening, or with food — when you take magnesium matters more than you think. Form-specific timing rules backed by clinical research.
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