Supplement ingredient databaseChecked 2026-09-30

Magnesium マグネシウム

Nutrient Function Claims ingredientEU-authorised claim

A mineral.

See example products PR

Minerals

In Japan: Foods with Nutrient Function Claims and the Dietary Reference Intakes

Wording allowed (current): “Magnesium is a nutrient necessary for the formation of bones and teeth.”
“Magnesium is a nutrient that helps many enzymes in the body work normally and helps produce energy, and is necessary for keeping blood circulation normal.”
Amount per daily serving: 96-300 mg (within this range, the wording above may be used without notification)
Proposed revision: “Magnesium is one of the nutrients necessary for building bones and teeth.”
“Magnesium is one of the nutrients that helps produce energy.”
“Magnesium is one of the nutrients that helps keep blood circulation normal.”
Amount: 96-320 mg
Referred to the Consumer Commission on July 17, 2026. The proposal includes a transition period allowing the current wording until March 31, 2030.
Dietary Reference Intakes (2025, ages 30–49): Recommended dietary allowance: men 380 mg, women 290 mg / tolerable upper intake level: 350 mg from non-ordinary foods (supplements and similar); not set for ordinary foods

In the EU: the register of health claims

EU-authorised claimIn the register: 10 authorised, 9 not authorised

Claims such as reduction of tiredness, muscle and nerve function, and maintenance of bones and teeth are authorised.

In the EU, only health claims whose evidence has been assessed by the European Food Safety Authority (EFSA) and authorised by the European Commission may be used on food. “Not authorised” means the evidence for that claim was not established under EU standards — not that the ingredient is dangerous.

What the US NIH says

A meta-analysis of clinical trials found a small drop in blood pressure, but the evidence for effects on heart disease, type 2 diabetes, and osteoporosis is limited.
Taking a lot from supplements or laxatives causes diarrhea. It interferes with the absorption of osteoporosis drugs (bisphosphonates) and some antibiotics.

Sources: MHLW eJIM "Magnesium"

Find products PR

These are Japanese online shops (affiliate links).

Example of a product labeled as a Food with Nutrient Function Claims

Chosen from products on Rakuten with “栄養機能食品” in the name, picking one with many reviews. Check the amount per daily serving on the package.

See on Rakuten (akol)See on Amazon.co.jp

This database does not guarantee any product's effect. For Foods with Function Claims, check the notification number on the package; for Foods with Nutrient Function Claims, check the amount per daily serving.

Compare “マグネシウムサプリ栄養機能食品” products on Rakuten Compare “マグネシウムサプリ栄養機能食品” products on Amazon.co.jp

This page lists information published by governments and public bodies. It does not guarantee any effect or judge whether something is good or bad. If you are being treated for an illness, taking medicine, pregnant or breastfeeding, talk to a doctor or pharmacist before use.

Other ingredients in the same categories

This page is a translation of our Japanese page; if they differ, the Japanese page is the reference.

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