The Vitamin C 23 Serum

Name: COSRX The Vitamin C 23 Serum
Brand: COSRX

serumbudget

Overall score6.6

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✶ Hero ingredients

#1Ascorbic Acid

Pure vitamin C antioxidant

#5Panthenol

Vitamin B5 — hydrates and soothes

#8Sodium Hyaluronate

Smaller molecule form of hyaluronic acid

Score breakdown

Overall

6.6

Hydration Efficacy3.7

Irritation Risk9.5

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Active Ingredient Strength4.1

Ingredient Transparency7.5

Formulation Safety9.0

Estimated — based on ingredient analysis. Scores refine as user reviews are added.

What makes COSRX The Vitamin C 23 Serum stand out

COSRX The Vitamin C 23 Serum is a solid serum with an overall score of 6.6/9.8. Positioned in the budget bracket, it delivers a well-rounded formulation that balances efficacy with gentleness. The formula leads with Ascorbic Acid, Panthenol, Sodium Hyaluronate — ingredients that actively target skin concerns.

It performs well on low irritation risk (9.5). On the flip side, hydration could be stronger and active ingredient concentration is on the lighter side.

Is this right for you?

Great for

✓Sensitive skin — low irritation risk with a gentle formulation
✓Safety-conscious shoppers — clean formulation with minimal flags
✓Ingredient-aware buyers — transparent, well-documented formula

May not suit

⚠Very dry skin types looking for heavy-duty moisture

Key ingredients

✶
Ascorbic Acid
Works on your skin — #1 in the INCI list
✶
Panthenol
Draws in moisture — #5 in the INCI list
✶
Sodium Hyaluronate
Draws in moisture — #8 in the INCI list
✶
Allantoin
Works on your skin — #9 in the INCI list

Full ingredient list

10 ingredients — listed in INCI order (highest concentration first)

#1Ascorbic Acid #2Water #3Propanediol #5Panthenol #6Sodium Lactate #72-Hexanediol #8Sodium Hyaluronate #9Allantoin #10Tromethamine #11Ethyl Hexanediol

Compare with similar products

Ingredient breakdown

Other ingredient5
Works on your skin2
Draws in moisture2
Formula balancers1

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