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COSRX
Advanced The Vitamin C 23 Serum
$42.50
Pack
Customer photos· 24
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High-strength vitamin C serum
A COSRX serum built around 23% pure vitamin C, with vitamin E and glutathione support, for users targeting dullness and uneven tone.
Best for
brightening routineexperienced vitamin C usersuneven tone
Why it stands out
23% pure vitamin C
The source description positions this as a high-strength ascorbic acid serum, so it is better suited to users already comfortable with vitamin C.
Tone and radiance focus
Vitamin E and glutathione support the brightening lane, making this a targeted tone-care step rather than a basic hydrating serum.
How it fits in a routine
serumampm
- Layer according to tolerance and avoid stacking too many strong actives at once.
Watch-outs & compatibility
Introduce gradually, avoid stacking with too many strong actives, and use daytime sunscreen.medium
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