A water-based serum with 13% pure vitamin C (ascorbic acid), vitamin E (tocotrienol), hyaluronic acid and allantoin. It is the gentler, daily sister to COSRX's Vitamin C 23. From COSRX, a Korean skincare brand.

Key ingredients

• Ascorbic Acid (13%): Pure vitamin C that helps brighten and even the look of skin tone
• Tocotrienol (Vitamin E): An antioxidant that helps protect skin from environmental stressors
• Hyaluronic Acid: Adds hydration
• Allantoin: Helps soothe the skin

Suits most skin types looking for daily brightening.

1. After cleansing and toning, apply a few drops to the face.
2. Massage gently from the centre outward until absorbed.
3. Follow with moisturizer. In the morning, finish with sunscreen.

• Size: 20 mL
• Skin type: Most skin types

Patch test on a small area before first use. Avoid the eye area. Stop use if irritation occurs. Vitamin C can tingle at first; start once a day. Avoid using it at the same time as retinol, strong acids or copper peptides. Wear sunscreen daily. Store away from heat and light; a slight yellow tint is normal.

What is the difference from Vitamin C 23?

The 13 has less vitamin C and a lighter, more refreshing feel, so it is easier for daily use and newer users.

Can I use it with niacinamide?

COSRX suggests using a high-strength niacinamide serum at a different time of day.

• The Peptide Collagen Hydrogel Eye Patch
• Advanced Snail 92 All in One Cream
• Four-Edge Gua Sha – White Jade, for a facial massage after