COSRX The Vitamin C 13 Serum

What it is
The COSRX The Vitamin C 13 Serum is a daily antioxidant treatment formulated with 13% pure Vitamin C (ascorbic acid) to brighten dull skin, fade pigmentation, and improve overall skin tone. Enriched with soothing and hydrating ingredients, it provides visible radiance without excessive irritation, making it ideal for beginners in Vitamin C skincare.

Lightweight watery texture
Fast-absorbing, non-sticky formula that feels refreshing on the skin. Delivers Vitamin C effectively while keeping the skin hydrated and comfortable.

Key ingredients
• Vitamin C (Ascorbic Acid 13%) – Brightens skin, fades dark spots, and improves skin clarity.
• Sodium Hyaluronate – Provides lightweight hydration and plumps the skin.
• Allantoin – Soothes and calms irritation for better tolerance.
• Tocopherol (Vitamin E) – Antioxidant that stabilizes Vitamin C and enhances its effectiveness.
• Arginine – Supports skin repair and elasticity.

Benefits
• Brightens dull and uneven skin tone
• Helps fade pigmentation and dark spots
• Protects against free radical damage
• Smooths skin texture and restores radiance
• Gentle enough for daily use

How to use
After cleansing and toning, apply 2–3 drops to the face in the morning routine. Follow with moisturizer and sunscreen. For sensitive skin, start by using 2–3 times per week and gradually increase frequency. Always store in a cool, dark place.

Ingredients (INCI)
Ascorbic Acid (13%), Water, Butylene Glycol, 1,2-Hexanediol, Arginine, Sodium Hyaluronate, Allantoin, Tocopherol, Hydroxyethylcellulose, and other stabilizing and hydrating agents.