CosRx The Vitamin C 13 Serum 20ml

CosRx The Vitamin C 13 Serum is a high-performance facial treatment formulated with 13% pure Vitamin C to target dullness, uneven skin tone, and signs of oxidative stress. This potent serum works to brighten dark spots, diminish the appearance of post-acne marks, and refine skin texture for a smoother, more radiant complexion. By combining pure Vitamin C with a blend of supporting ingredients like hyaluronic acid, niacinamide, and tocotrienol, the formula provides comprehensive antioxidant protection while maintaining skin hydration and health.

Advantages

The primary benefit of this serum lies in its concentrated 13% pure Vitamin C formula, which effectively combats hyperpigmentation and redness to promote a more uniform skin tone. The inclusion of tocotrienol, a superior form of Vitamin E, works synergistically with Vitamin C to enhance antioxidant efficacy and protect the skin from environmental stressors. Additionally, the serum is enriched with soothing agents such as panthenol, allantoin, and licorice root extract, which help to minimize potential irritation often associated with high-potency Vitamin C products. The lightweight, fast-absorbing texture ensures that the serum integrates seamlessly into daily skincare routines without leaving a heavy or sticky residue.

Suitable for

• Reducing the appearance of dark spots and hyperpigmentation
• Improving overall skin brightness and radiance
• Smoothing uneven skin texture and minimizing pore visibility
• Providing antioxidant protection against environmental damage
• Addressing post-acne marks and redness

When it may not be suitable

This product may not be suitable for individuals with extremely sensitive skin or those who have not previously used high-concentration Vitamin C treatments, as the active formula may cause temporary tingling or irritation. It is also not recommended for use on broken, irritated, or compromised skin barriers.

Key specifications

• Concentration: 13% pure Vitamin C
• pH level: 3.5
• Key ingredients: Hyaluronic acid, tocotrienol (Vitamin E), niacinamide, caffeine, glutathione, panthenol, and licorice root extract
• Volume: 20ml
• Formula: Lightweight, fast-absorbing serum

How to use

After cleansing and toning, apply a few drops of the serum to the face, focusing on areas with dark spots or uneven texture. Gently massage the product into the skin using your fingertips until fully absorbed. For best results, follow with a moisturizer. If using during the day, it is essential to apply a broad-spectrum sunscreen as the final step of your skincare routine to protect the skin and maintain the efficacy of the Vitamin C.

What to consider before purchase

• Perform a patch test before full facial application to check for sensitivity
• Store the product in a cool, dark place away from direct sunlight to maintain ingredient stability
• Use within the recommended period after opening to ensure maximum potency
• Always pair with SPF during daytime use

Usage recommendations

For optimal results and to prevent oxidation, keep the bottle tightly closed and store it in a refrigerator or a cool, dark environment. If you are new to Vitamin C, start by using the product every other day to allow your skin to build tolerance.