The Vitamin C 13 Serum

After cleansing, apply a few drops to the skin during the serum step. Using your fingertips, gently massage the serum into the skin, working from the center of the face outward until fully absorbed.

/KEEP REFRIGERATED (3~10°C)/

*For best results, use immediately after purchase. Once opened, store upright in the refrigerator.

*Cautions*
1. For first use, attach the dropper included in the product package.
2. To preserve the active ingredients, we recommend using within 2 months of opening.
3. Can I use a highly concentrated serum only in the evening? No! This serum can be used both in the morning and evening.
4. If used in the morning, always follow with a sunscreen of SPF 30 or higher.
5. As this product contains a high concentration of Vitamin C, we recommend avoiding use alongside Copper Peptide products, including our Blue Peptide Serum & Cream. For best results, use them at different times of day (morning/evening) to optimize absorption and maximize the benefits of each product.

KEY INGREDIENTS
• 13% Pure Vitamin C :
Improves discoloration and uneven skin tone.
💡Learn More about Vitamin C →

• Tocotrienol(Super Vitamin E) :
Boasts up to 50 times greater anti-oxidizing efficacy than Tocopherol.

• Hyaluronic Acid and Allantoin :
Provides moisture and relieves irritation.

Recommended for
COSRX The vitamin C 13 serum is ideal for those who want a Vitamin C product for daily use that also cares for hydrating and brightening the complexion.

Target concerns 
- Hyperpigmentation 
- Anti aging 
- Dullness

Texture
Non-sticky, lightweight, watery texture that absorbs well

Color
It has a slight yellowish tint, indicating that it contains pure vitamin C