Magnesium Oxide
This is what the ingredient is.
Magnesium oxide is an inorganic compound used as magnesium source for fortification. Essential mineral for muscle and nerve function.
Here is why it shows up on the label.
Nutrient fortification and anticaking agent. Used in supplements and fortified foods. Essential for hundreds of enzymatic reactions.
Here is what food agencies say.
FDA GRAS as nutrient source. RDA: 310-420 mg/day. Upper limit: 350 mg/day from supplements (no limit from food). Approved globally.
Here is what research has found.
Essential mineral involved in energy production, protein synthesis, muscle and nerve function, and bone health. Deficiency relatively common. Low bioavailability compared to other magnesium forms.
Here are a few things worth knowing.
Generally safe. Has laxative effect, especially at higher doses - commonly used as laxative. May cause diarrhea and GI upset. Can interfere with absorption of certain antibiotics. Food sources and fortification generally safe.
Sources
- FDA Regulations
- NIH Magnesium Fact Sheet
- Magnesium Research 2015
How to read this page
We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.