Food additive databaseantioxidantChecked 2026-10-02

Enzymatically Decomposed Rutin ルチン酵素分解物

Existing food additiveNot on the EU additive list

Purpose: antioxidant
On the label: “酸化防止剤（イソクエルシトリン）” (antioxidant (isoquercitrin)), “酸化防止剤（ルチン酵素分解物）” (antioxidant (enzymatically decomposed rutin))
Name in the List of Existing Food Additives: ルチン酵素分解物 (No. 320)
Source and production: Obtained by treating rutin (extract) with enzymes and then purifying it. The main component is isoquercitrin (definition in the Japanese Standards of Food Additives).

In Japan

An antioxidant obtained by treating rutin (extract) from azuki beans, Japanese pagoda tree (enju), or buckwheat with enzymes and purifying it, with isoquercitrin as the main component. There are no standards for use.
Antioxidant is a use for which the purpose name must be written alongside, as in “酸化防止剤（イソクエルシトリン）” (antioxidant (isoquercitrin)). The simplified name is “イソクエルシトリン” (isoquercitrin).
“酵素処理イソクエルシトリン” (enzymatically modified isoquercitrin) and “酵素処理ルチン（抽出物）” (enzymatically modified rutin (extract)) are separate items.

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 not on the EU list of food additives (Regulation (EC) No 1333/2008, Annex II), so it cannot be used as a food additive in the EU.

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 antioxidant

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