The Vitamin C 23 Serum

Your booster for ultimate radiance: COSRX The Vitamin C 23 Serum

Do you dream of an even, radiant complexion that glows with youthful luminosity? COSRX The Vitamin C 23 Serum is your highly concentrated secret weapon against dull skin, pigmentation spots, and signs of aging. With a whopping 23% pure vitamin C (ascorbic acid), this serum is a powerhouse that targets improving skin texture, reducing hyperpigmentation, and strengthening the skin barrier. Discover how this serum revitalizes your skin and gives you an unparalleled glow.

This serum is more than just a brightener; it is a comprehensive anti-aging ally. It helps smooth fine lines and wrinkles, boosts collagen production, and protects your skin from harmful environmental influences thanks to its powerful antioxidant effect. The light, non-sticky texture absorbs quickly and leaves your skin feeling supple and ready for the next layer of care. Experience the transformation to visibly more radiant, smoother, and healthier-looking skin with COSRX The Vitamin C 23 Serum.

The power of ingredients for your skin

The formulation of COSRX The Vitamin C 23 Serum is a masterpiece of K-beauty, combining pure active ingredients with soothing and moisturizing components to ensure maximum effectiveness with minimal irritation:

• 23% pure ascorbic acid (vitamin C): This is the star of the show. At this high concentration, ascorbic acid is an extremely potent antioxidant that neutralizes free radicals, stimulates collagen production, and inhibits melanin production. The result is visibly brightened skin, reduced pigmentation, and a more youthful complexion.
• Tocotrienols & Tocopherol (Vitamin E): Vitamin E is another powerful antioxidant that works synergistically with vitamin C. This combination enhances antioxidant protection and helps improve the stability of vitamin C while nourishing the skin and protecting it from environmental damage.
• Panthenol (Pro-Vitamin B5): Known for its soothing and moisturizing properties, panthenol helps strengthen the skin barrier, reduce redness, and keep skin supple, minimizing potential irritation from highly concentrated vitamin C.
• Squalane: A skin-identical lipid that intensely moisturizes the skin without leaving a greasy film. Squalane improves skin elasticity and protects against moisture loss, which is especially important for maintaining a healthy skin barrier.
• Sodium Hyaluronate: The salt form of hyaluronic acid, which can penetrate deeper into the skin. It effectively binds moisture in the skin, plumping it from within and ensuring a plumper, more hydrated appearance.
• Niacinamide (vitamin B3): A versatile active ingredient that strengthens the skin barrier, regulates sebum production, refines pores, and also helps to lighten pigmentation spots. It works excellently with vitamin C to promote an even complexion.

How to integrate COSRX The Vitamin C 23 Serum into your routine

For optimal results and to allow your skin to adjust to the high concentration, follow these application recommendations:

1. Cleansing: Start with a gentle cleanser to remove dirt and makeup.
2. Toner: Apply a moisturizing toner to balance your skin's pH and prepare it for the next steps.
3. Serum: Apply 2-3 drops of COSRX The Vitamin C 23 Serum to your face. Spread it gently and pat it in lightly until it is completely absorbed. Avoid the eye area. If you have sensitive skin, start by using it every other day and gradually increase the frequency.
4. Moisturizer: Finish your routine with a rich moisturizer to soothe the skin and lock in moisture.
5. Sun protection (morning): As vitamin C can make the skin more sensitive to light, a broad-spectrum sunscreen with SPF 30 or higher is essential in the morning.

Pro tip: Store the serum in a cool, dark place (ideally in the refrigerator) to maximize the stability of the vitamin C and prevent oxidation.

Complete your routine with COSRX

Optimize the effects of your Vitamin C 23 Serum by combining it with other cult products from COSRX:

• Step 1 (cleanser): Low pH Good Morning Gel Cleanser - A gentle, low pH cleanser that thoroughly but gently cleanses your skin and prepares it for subsequent care.
• Step 2 (Essence): Advanced Snail 96 Mucin Power Essence - A moisturizing booster that plumps the skin, soothes irritation, and optimizes serum absorption.
• Step 4 (Moisturizer): Advanced Snail 92 All in one cream - A regenerating cream that strengthens the skin barrier, provides intense moisture, and soothes the skin.
• Step 5 (Sun Protection): Aloe Soothing Sun Cream - A lightweight SPF 50+ sunscreen that protects the skin from UV rays without weighing it down – essential when using vitamin C.

Any questions? We have the answers!

How do I store COSRX The Vitamin C 23 Serum correctly?

To preserve the effectiveness and stability of the highly concentrated vitamin C, we strongly recommend storing the serum in a cool, dark place. A refrigerator is ideal for slowing down oxidation and extending shelf life. Be sure to always close the bottle tightly after use.

Can I use the serum every day?

Due to the high concentration of 23% pure vitamin C, we recommend using the serum every other day at first, especially if your skin is sensitive or you have no experience with high-dose vitamin C. Observe your skin's reaction and, if well tolerated, gradually increase the application to once a day, ideally in the evening, or in the morning in combination with a reliable sunscreen.

Can I combine this vitamin C serum with other active ingredients such as retinol or AHAs/BHAs?

When using a highly concentrated vitamin C serum like this one, caution is advised if you want to combine it with other potentially irritating active ingredients such as retinol or AHAs/BHAs. To avoid overstimulation, we recommend alternating these active ingredients (e.g., vitamin C in the morning, retinol in the evening) or using them on different days. If you are unsure, always consult a dermatologist.

About COSRX

COSRX is an award-winning K-beauty brand known for its minimalist, effective formulations. The name is a combination of "Cosmetics" and "RX" (Prescription) and reflects their commitment to developing skin-friendly products with highly effective ingredients. COSRX focuses on solving specific skin concerns such as acne, dryness, and sensitivity by omitting unnecessary fillers and relying on proven active ingredients. Their products are often hypoallergenic and dermatologically tested, making them a trusted choice for a wide range of skin needs.