Ask KBeauty Verified™

KBeauty Verified™ — K-beauty checked against official records from Korea, the EU and the U.S.

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Google · Gemini0

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Named by what the crawler says it is; look-alikes we detect are counted under Others. Google · Gemini includes Googlebot, Google’s search crawler, whose index Google also uses for its AI features; other search engines and bots are in Others. AI visibility →

Daidzein

Korean: 다이드제인 · CAS 486-66-8 · Functions: skin conditioning - miscellaneous

KR South Korea (MFDS)

No specific rule on file.

EU European Union (CosIng)

Restricted Annex III/374

Maximum: 0,02 %

Conditions: From 1 February 2025 cosmetic products containing that substance and not complying with the conditions shall not be placed on the Union market. From 1 November 2025 cosmetic products containing that substance and not complying with the conditions shall not be made available on the Union market.

Source: EU CosIng — Annex III · checked Oct 17, 2026

US United States (FDA)

No specific rule on file. The FDA regulates few cosmetic ingredients by name; no rule does not mean approval.

Also listed as

DAIDZEIN 다이드제인

Information only, not medical advice. Rules change — always check the linked official source. If you are pregnant, have a skin condition or allergies, ask a dermatologist or pharmacist.

Frequently asked questions

Is Daidzein banned in the European Union?

In the EU's CosIng records it is listed as “Restricted” (EU CosIng — Annex III). The maximum allowed is 0,02 %. A restricted ingredient is allowed within the stated conditions.

Is Daidzein banned in South Korea?

We found no specific rule for it in Korea's MFDS records. That is not an approval or a safety statement.

Is Daidzein allowed in cosmetics in the U.S.?

We found no specific rule for it in the FDA's records. That is not an approval or a safety statement.

What is Daidzein used for in cosmetics?

The EU's CosIng inventory lists its functions as: skin conditioning - miscellaneous.

What is Daidzein called on Korean labels?

Korea's MFDS standard Korean name is 다이드제인.

What is the CAS number of Daidzein?

CAS 486-66-8 (from official records).