Cosrx - Serum The Vitamin C 13
Cosrx - Serum The Vitamin C 13
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This multi-correcting serum combines the benefits of vitamin C and niacinamide to target imperfections, dark spots, and uneven skin tone. With its 13% stabilized vitamin C formula, enriched with zinc PCA and N-acetylglucosamine, it purifies, evens, and brightens skin while reducing excess sebum. Its lightweight, fluid texture absorbs quickly without leaving a greasy feeling.
The benefits
The benefits
This treatment is ideal for skin prone to blemishes, dark spots, and skin imbalances. It refines pores, reduces redness, and visibly brightens the complexion. From the first applications, skin is clearer, softer, more balanced, and radiant.
Composition and key assets
Composition and key assets
• Vitamin C (13%): brightens, fights against oxidation and pigment spots.
• Niacinamide (Vitamin B3): regulates sebum, tightens pores, improves texture.
• Zinc PCA: purifies and mattifies the skin.
• N-acetylglucosamine: gentle exfoliant that evens out skin tone and boosts hydration.
How to use
How to use
Apply a few drops to your face morning or night after toning. Massage gently until completely absorbed. Introduce gradually into your routine (starting every other day), and always apply sunscreen during the day.
Avoid combining with strong acids or retinol in the same routine.
Routine step
Routine step
4. Essence / Serum / Ampoule
Use before moisturizer, morning or evening depending on tolerance.
Native country
Native country
South Korea


