Evidence-backed FAQ
How do different forms of magnesium differ?
Direct answer
Magnesium forms differ in the compound paired with magnesium, which can affect solubility, elemental-magnesium delivery, and absorption. In a small human study, citrate was more soluble and more bioavailable than oxide.[1], [2]
What the evidence shows
The clearest head-to-head evidence in the current catalog compares citrate with oxide. It does not directly measure magnesium glycinate.[2]
Important limitations
The principal comparison was a small acute study using urinary magnesium as an absorption proxy. Glycinate-specific absorption and tolerability were not measured.[2]
Related questions
- Was magnesium glycinate directly compared with citrate?
- Why can the form matter?
Read the full evidence summary
This FAQ is the concise answer. The linked research page provides the full study context, populations, doses, outcomes, and limitations.
References
- Bioavailability and pharmacokinetics of magnesium after administration of magnesium salts to humans.. American journal of therapeutics. 2001. Narrative review View source →
- Magnesium bioavailability from magnesium citrate and magnesium oxide.. Journal of the American College of Nutrition. 1990. Non-randomized trial View source →