Magnesium oxide is a source of magnesium. It is a multi-purpose ingredient that can act as a nutrient, humectant, anticaking agent or acidity regulator.

Magnesium Oxide

Found In

  • Beverages
  • Foods
  • Infant formula

Also Known As

  • Calcined Magnesia
  • E530

The Beverage Bottom Line

Magnesium oxide is authorized for use in the U.S., Europe and Canada.

 

This ingredient may have authorizations in countries not included on this site.

International Assessments and Authorizations

U.S. Food And Drug Administration (FDA)

Affirmation by FDA this ingredient is generally recognized as safe as a direct human food ingredient. (GRAS FDA-Affirmed)

In 2006, dietary reference intakes for magnesium were reviewed by the National Academies of Sciences, Engineering and Medicine.

In 1976, magnesium salts as ingredients were evaluated for health aspects.

FDA describes (a, b) nutrition facts labeling requirements.

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European Food Safety Authority (EFSA)

Safe for intended uses (nutrient, additive).

 

In 2015, EFSA issued an opinion on dietary reference values for magnesium.

In 2009, 2010 and 2013, EFSA assessed health claims for magnesium.

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Joint FAO/WHO Expert Committee on Food Additives (JECFA)

Safe for intended uses.

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Health Canada

Safe for intended uses (anticaking). Permitted as a supplemental ingredient.

 

In 2006, dietary reference intakes for magnesium were reviewed by the National Academies of Sciences, Engineering and Medicine.

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This page was last updated on 6/30/2025.