Ask KBeauty Verified™

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

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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 →

COSRX Advanced The Vitamin C 23 Serum

Name: COSRX Advanced The Vitamin C 23 Serum
Brand: COSRX

Serum

Check against official records

KR South Korea (MFDS)

3 ingredients with Korea limits or conditions.

Sodium Hydroxide, Tocopherol, Beta-Carotene

EU European Union (CosIng)

1 ingredient with EU limits or conditions.

Sodium Hydroxide

US United States (FDA)

No prohibited or restricted ingredients found in U.S. records.

#	Ingredient (as listed)	KR Korea	EU EU	US U.S.
1	Aqua/Water	—	—	—
2	Ascorbic Acid	—	—	—
3	Butylene Glycol	—	—	—
4	Dimethicone	—	—	—
5	Panthenol	—	—	—
6	3-O-Ethyl Ascorbic Acid	—	—	—
7	Squalane	—	—	—
8	Sodium Hydroxide	Restricted	Restricted · (a) 5% · (b) 2% · 4.5%…	—
9	Caffeine	—	—	—
10	Sodium Hyaluronate	—	—	—
11	Sodium Metaphosphate	—	—	—
12	Adenosine	—	—	—
13	Acetyl Glucosamine	—	—	—
14	Gardenia Florida Fruit Extract	—	—	—
15	Allantoin	—	—	—
16	Dextrin	—	—	—
17	Tocotrienols	—	—	—
18	Tocopherol	Restricted · 20%	—	—
19	Elaeis Guineensis (Palm) Oil	—	—	—
20	Arginine	—	—	—
21	Niacinamide	—	—	—
22	Pentylene Glycol	—	—	—
23	Glutathione	—	—	—
24	Helianthus Annuus (Sunflower) Seed Oil	—	—	—
25	Methyl Trimethicone	—	—	—
26	Carthamus Tinctorius (Safflower) Seed Oil	—	—	—
27	Camellia Japonica Seed Oil	—	—	—
28	Daucus Carota Sativa (Carrot) Root Extract	—	—	—
29	Glycyrrhiza Glabra (Licorice) Root Extract	—	—	—
30	Beta-Carotene	Restricted	Approved colorant Approved colorant	—

“—” means no specific record for that ingredient in that jurisdiction's lists — it is not an approval. Restricted ingredients are allowed within limits (concentration, product type, label warnings); a product listing one is not necessarily over the limit. How we check.

Ingredient list from COSRX official store, retrieved Oct 16, 2026. Formulas change — check the label on the package you buy.

Storage & heat

Official storage statements

“Keep out of direct sunlight. Keep out of reach of children.” — Common precautions required on all cosmetics in Korea (Cosmetics Act Enforcement Rule, Annex 3)

On the brand's product page

“Keep the serum refrigerated between 3–10°C to maintain freshness.”

“keep in refrigerator.”

Our note — heat, light & air

This formula lists ingredients that are known to break down faster in heat, light or air:

Ascorbic Acid — air, light, heat
Tocopherol — light, air

Other markets

Ingredients in this formula that are prohibited or limited in other markets, from the overseas regulation database compiled by Korea's MFDS. Limited means allowed within conditions.

Market	Prohibited	Limited
CN China	None found	Beta-Carotene, Sodium Hydroxide
AS ASEAN (10 countries)	None found	Beta-Carotene, Sodium Hydroxide
JP Japan	None found	Allantoin, Caffeine, Panthenol
TW Taiwan	None found	3-O-Ethyl Ascorbic Acid, Allantoin, Beta-Carotene, Sodium Hydroxide
CA Canada	None found	—
BR Brazil	None found	Sodium Hydroxide
AR Argentina	None found	Sodium Hydroxide

Recalls & alerts for COSRX

US Jan 22, 2026 — ULTRAVIOLET SCREEN/SUNSCREEN N.E.C.: NOT LISTED: Appears to be misbranded as defined in section 502(o) of the FD&C Act. Based on the information available to the FDA, it appears that the drug... source
US May 31, 2024 — CLEANSING (COLD CREAMS, CLEANSING LOTIONS, LIQUIDS, PADS) (SKIN CARE PREPARATIONS): UNAPPROVED: The article is subject to refusal of admission pursuant to Section 801(a)(3) in that it appears to be a new drug within the meaning of Section... source
US Aug 12, 2021 — MOISTURIZING (SKIN CARE PREPARATIONS): NO 510(K): The article is subject to refusal of admission pursuant to Section 801(a)(3) in that it is a post 1976 device for which a Section... source
US Aug 12, 2021 — PASTE MASKS (MUD PACKS) (SKIN CARE PREPARATIONS): NO 510(K): The article is subject to refusal of admission pursuant to Section 801(a)(3) in that it is a post 1976 device for which a Section... source
US Jul 27, 2021 — FACE,BODY,AND HAND (EXCLUDING SHAVING PREPARATIONS) (SKIN CARE PREPARATIONS): NO 510(K): The article is subject to refusal of admission pursuant to Section 801(a)(3) in that it is a post 1976 device for which a Section... source
US Jul 21, 2021 — FACE,BODY,AND HAND (EXCLUDING SHAVING PREPARATIONS) (SKIN CARE PREPARATIONS): NO 510(K): The article is subject to refusal of admission pursuant to Section 801(a)(3) in that it is a post 1976 device for which a Section... source
US Mar 2, 2020 — CLEANSING (COLD CREAMS, CLEANSING LOTIONS, LIQUIDS, PADS) (SKIN CARE PREPARATIONS): NO 510(K): The article is subject to refusal of admission pursuant to Section 801(a)(3) in that it is a post 1976 device for which a Section... source
US Jan 23, 2020 — FACE,BODY,AND HAND (EXCLUDING SHAVING PREPARATIONS) (SKIN CARE PREPARATIONS): NOT LISTED: Appears to be misbranded as defined in section 502(o) of the FD&C Act. Based on the information available to the FDA, it appears that the drug... source
US Jul 24, 2019 — OTHER SKIN CARE PREPARATIONS, N.E.C.: UNAPPROVED: The article is subject to refusal of admission pursuant to Section 801(a)(3) in that it appears to be a new drug within the meaning of Section... source
US Mar 11, 2019 — MOISTURIZING (SKIN CARE PREPARATIONS): NOT LISTED: Appears to be misbranded as defined in section 502(o) of the FD&C Act. Based on the information available to the FDA, it appears that the drug... source

Compare with

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Information only, not medical advice. If you are pregnant, have a skin condition or allergies, ask a dermatologist or pharmacist before use.