Legal status by country
Is Magnesium legal?
Written by Aaron CuhaReviewed Sep 2026
How Magnesium is classified in the United States, United Kingdom, Australia and Canada, side by side. Each country has its own page with a direct answer, the regulator's approval status and what the classification means in practice.
All four countries, side by side
| Attribute | United States · FDA | United Kingdom · MHRA | Australia · TGA | Canada · Health Canada |
|---|---|---|---|---|
| Status | Not approved | Not approved | Not approved | Not approved |
| Classification | Sold as a supplement | Sold as a supplement | Available as a supplement / complementary medicine | Sold as a supplement |
| Note | Intravenous magnesium sulfate is an approved prescription drug for eclampsia. Oral supplements are not approved to treat anything. | None recorded | None recorded | None recorded |
US FDA status: Sold as a dietary supplement. Magnesium sulfate injection is a separately approved prescription drug for eclampsia and severe asthma, which is a different route, dose and purpose.. Reviewed Sep 2026.
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General information current as of Sep 2026, not legal advice. Classifications change; confirm with the regulator or a lawyer for a specific situation. Educational use only. This database summarizes published research. It is not medical advice and contains no dosing protocols or recommendations for personal use. The Longevity Archive has no vendor relationships.