COSRX: The Vitamin C 13 Serum,

A daily brightening vitamin C serum formulated with 13% pure Vitamin C (ascorbic acid) that’s lighter and gentlerthan higher‑strength options, while still helping improve uneven tone, dullness, and dark spots. It also contains hydrating and soothing ingredients, making it suitable for regular use.

🌟 Key Ingredients & What They Do

• 13% Pure Vitamin C (L‑Ascorbic Acid)
  → Brightens skin, improves discoloration & boosts tone.
• Tocotrienol (Super Vitamin E)
  → Strong antioxidant that supports Vitamin C and helps protect skin from environmental stress.
• Hyaluronic Acid (Sodium Hyaluronate)
  → Draws moisture into the skin for hydration.
• Panthenol & Allantoin
  → Soothe and calm skin.
• Niacinamide & Licorice Extract
  → Help brighten and even tone further.

✨ Benefits

✔️ Brightens dull skin and uneven tone over time.
✔️ Helps fade dark spots, blemishes & pigmentation with consistent use.
✔️ Hydrates and soothes, making it more comfortable for daily use.
✔️ Lightweight, non‑sticky texture — great as a base for moisturizer or sunscreen.

🧴 How to Use

1. Cleanse & tone your face.
2. Apply 2–3 drops of the serum onto face and gently pat in.
3. Follow with moisturizer.
4. In the morning, always finish with sunscreen (vitamin C works best with SPF).

💡 You can use it AM and/or PM, but sunscreen is essential with vitamin C products.

👍 Best For

• All skin types including sensitive (gentler than higher % vitamin C).
• People who want daily brightening & even skin tone.
• Those new to vitamin C serums or who find stronger versions irritating.

⚠️ Tips & Things to Know

• Vitamin C can be unstable — keep it in a cool, dry place and use within its recommended period after opening.
• Some users notice a slight yellowish tint to the serum — this is normal (not necessarily oxidation) if it’s still within shelf life.
• Start slowly if you have very sensitive skin and patch‑test first.

🧠 Quick Summary

• ⭐ Daily vitamin C serum for brightening + fading dark spots
• 🍋 13% pure vitamin C + vitamin E + hydrating ingredients
• 💧 Lightweight, easily absorbed formula
• ☀️ Use with sunscreen for best results