COSRX The Vitamin C 13 Serum is a lightweight daily vitamin C serum designed to brighten dull skin, improve uneven tone, and reduce the appearance of dark spots, freckles, and pigmentation. Formulated with 13% pure vitamin C, 3-O-ethyl ascorbic acid, tocotrienols, hyaluronic acid, panthenol, allantoin, niacinamide, glutathione, and licorice root extract, it helps support a clearer, smoother, more radiant-looking complexion without a sticky finish.

Benefits:

• Brightens uneven skin tone: 13% pure vitamin C helps improve the appearance of discoloration, dullness, and uneven tone.
• Helps fade dark spots: Supports visible improvement in pigmentation, freckles, post-blemish marks, and melanin-related unevenness.
• Daily antioxidant care: Vitamin C, tocotrienols, tocopherol, glutathione, and licorice root extract help protect the skin from environmental stress.
• Hydrates while brightening: Sodium hyaluronate, panthenol, and allantoin help keep the skin comfortable and moisturized.
• Improves skin texture: Helps smooth roughness and refine the look of pores with consistent use.
• Supports firmness and fine line care: Adenosine, vitamin C, and antioxidant ingredients help improve the appearance of elasticity and eye-area wrinkles.
• Lightweight watery texture: Absorbs quickly without stickiness, making it suitable for daily skincare routines.

Skin Types: Normal • Combination • Oily • Dull • Pigmentation-prone skin
Skin Concerns: Hyperpigmentation • Dark spots • Freckles • Dullness • Uneven tone • Rough texture • Pores • Early signs of aging

Clinical Results:

• After 4 weeks: 113.77% improvement in surface moisture.
• After 4 weeks: 20.17% improvement in skin texture roughness.
• After 4 weeks: 16.07% improvement in pigmentation.
• After 4 weeks: 12.22% reduction in melanin area.
• After 4 weeks: 31.92% improvement in redness.
• After 4 weeks: 15.6% improvement in yellowness.
• After 4 weeks: 3.94% improvement in brightness.
• After 4 weeks: 10.64% improvement in wrinkles around the eye area.
• After 4 weeks: 19.64% improvement in external elasticity.
• After 4 weeks: 14.07% improvement in internal elasticity.
• After 4 weeks: 36.97% reduction in pore volume.
• After 4 weeks: 34.44% reduction in pore area.
• After 4 weeks: 27.12% reduction in pore count.
• After 4 weeks: 9.4% reduction in pore depth.

Clinical study note: Based on clinical trials of 21 subjects by Dermacosmetic Skin Science Laboratory Co., Ltd. Individual results may vary.

How to Use:

1. After cleansing and toner, apply a few drops to the skin.
2. Gently massage and pat with fingertips until absorbed, moving from the center of the face outward.
3. Follow with moisturizer.
4. If used in the morning, apply sunscreen as the final step.

Key Ingredients:

• 13% Pure Vitamin C / Ascorbic Acid – Helps brighten dull skin and improve the look of dark spots, discoloration, and uneven tone.
• 3-O-Ethyl Ascorbic Acid – A vitamin C derivative that supports radiance and uneven tone care.
• Tocotrienols – A form of vitamin E that provides strong antioxidant support.
• Tocopherol – Vitamin E derivative that helps protect and condition the skin.
• Sodium Hyaluronate – Helps attract moisture and keep skin looking plump and hydrated.
• Panthenol – Helps soothe, moisturize, and support skin comfort.
• Allantoin – Helps calm and soften the skin.
• Glutathione – Provides antioxidant support and helps improve the look of dullness.
• Niacinamide – Helps improve uneven tone, dullness, and skin clarity.
• Licorice Root Extract – Helps soothe the skin and support a brighter-looking complexion.
• Adenosine – Helps improve the appearance of fine lines and supports smoother-looking skin.
• Acetyl Glucosamine – Helps support smoother-looking texture and overall radiance.

Important Cautions:

• Patch testing before use is recommended, especially for sensitive skin.
• Vitamin C may cause mild tingling at first. If irritation continues, reduce frequency or stop use.
• Use sunscreen every morning when using brightening or vitamin C products.
• Avoid layering in the same routine with strong exfoliating acids, retinol, or benzoyl peroxide if your skin is sensitive.
• Pure vitamin C can naturally change color over time. Store away from heat and direct sunlight, and close tightly after use.

Ingredients:

Water, Ascorbic Acid(13%), Butylene Glycol, Dipropylene Glycol, Tromethamine, 3-0-Ethyl Ascorbic Acid, Panthenol, Acetyl Glucosamine, Caffeine, Sodium Hyaluronate, Sodium Sulfite, Disodium EDTA, Glutathione, Adenosine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Squalane, Tocotrienols, Tocopherol, Elaeis Guineensis (Palm) Oil, Arginine, Niacinamide, Pentylene Glycol, Glycyrrhiza Glabra (Licorice) Root Extract

FAQ:

Q: What does COSRX The Vitamin C 13 Serum help with?
A: It helps with dullness, dark spots, freckles, pigmentation, uneven skin tone, rough texture, visible pores, and early signs of aging.

Q: Is COSRX The Vitamin C 13 Serum suitable for daily use?
A: Yes. It is designed as a gentler daily vitamin C serum compared to stronger vitamin C formulas, but sensitive skin should start slowly.

Q: Can I use it in the morning?
A: Yes, it can be used in the morning. Always apply sunscreen as the final step of your daytime routine.

Q: Can I use it at night?
A: Yes. It can also be used at night after toner and before moisturizer.

Q: Does it help with pigmentation?
A: Yes. The formula contains 13% pure vitamin C, niacinamide, glutathione, and licorice root extract to help improve the look of pigmentation and uneven tone.

Q: Is the yellow color normal?
A: Yes. A slight yellowish tint is normal because the formula contains pure vitamin C.

Q: Can sensitive skin use it?
A: Sensitive skin can use it carefully, but patch testing is recommended. Start 2–3 times per week and increase gradually if your skin feels comfortable.

Q: Can I use it with retinol or exfoliating acids?
A: It is better to use them in separate routines or on alternate days, especially if your skin is sensitive, to reduce the risk of irritation.

Q: Popular search term for this product?
A: Frequently searched by shoppers looking for Korean Cosmetics Cyprus and Korean vitamin C serums for dark spots, pigmentation, dullness, and glow.