Food additive databasenutrient (fortification)Checked 2026-10-02

Magnesium Hydroxide 水酸化マグネシウム

Designated additivePermitted in the EU (E528)

Purpose: nutrient (fortification)
On the label: “水酸化マグネシウム” (magnesium hydroxide), “水酸化Mg” (Mg hydroxide) (labeling is exempt when used for nutritional fortification)
Name in the List of Designated Additives: 水酸化マグネシウム (No. 235)

In Japan

Used to supplement magnesium and for similar purposes. No standards for use have been set.
It is included among additives that may be used for nutritional fortification (minerals), and when used for that purpose, labeling is exempt. The short name when written by substance name is “水酸化Mg” (Mg hydroxide).

Japan's standards for use

There are no standards for use that limit which foods or how much (the general standards for all additives still apply).

This is a summary of the standards for use. See the source list for the exact conditions.

In the EU

It is on the EU list of food additives (Regulation (EC) No 1333/2008, Annex II) as E528.

Sources

Checked 2026-10-02. Rules and evaluations change over time. This page is a translation of our Japanese page; if they differ, the Japanese page is the reference.

This page lists facts stated in laws and in evaluations by public bodies; it is not a safety verdict. Additives used in Japan are approved by the government, which sets the foods and amounts they can be used in. The ADI is a guide to the amount that is considered safe to take every day over a lifetime.

Other substances used as nutrient (fortification)

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