Skip to product information
COSRX The Vitamin C 13 Serum 20ml showcasing the lightweight brightening texture for dark spot correction and glowing Korean skincare.
  • COSRX The Vitamin C 13 Serum 20ml showcasing the lightweight brightening texture for dark spot correction and glowing Korean skincare.
COSRX The Vitamin C 13 serum 20ml

COSRX The Vitamin C 13 serum 20ml

$17.99
$17.99
Prices for United States include all VAT & Duties — No Extra Fees. Shipping & Tax Details

Revitalize a lackluster surface mantle and fade early hyperpigmentation marks with COSRX The Vitamin C 13 Serum 20ml : Vitamin C 13, a gentle yet highly stable antioxidant concentrate formulated for daily skin tone standardization. Calibrated at an optimal 13% concentration of pure Ascorbic Acid, this introductory brightening fluid sweeps away sallow undertones, addresses sun damage, and minimizes early fine dry lines without triggering the peeling or stinging associated with higher-strength treatments. Its silky, lightweight delivery fluid integrates seamlessly into your daily architecture—leaving a dull, fatigued, or sensitive combination canvas feeling remarkably supple, smooth, and radiantly luminous.

  • Target Concerns: Early Dark Spots & Sun Damage, Dull or Sallow Complexion, Uneven Tone Undercurrents, Early Fine Lines, Loss of Initial Elasticity
  • Skin Compatibility: Universal formulation (Specifically optimized for Vitamin C beginners, sensitive skin types, and combination profiles that find maximum-strength clinical serums too intense)
  • Texture & Finish: A light, cushiony fluid texture with an effortless, smooth glide. It sinks uniformly into the skin envelope within moments, establishing a comfortable, moisture-locked satin finish with zero heavy grease, sticky residue, or film.
Free Shipping
Over $69 Tracked
100% Authentic
Brand Partnership
Direct From KR
Fresh Stock Only
Safe & Secure
256-Bit SSL Secured

Transform your daily radiance architecture and safeguard your skin envelope from urban environmental damage with a stable, entry-level brightening concentrate designed to restore natural cellular luminosity safely. When the delicate surface mantle is exposed to chronic UV rays, pollution, and daily oxidative stressors, free radicals run rampant, breaking down vital structural proteins and accelerating melanin overproduction. This localized cellular stress causes dark spot shadows to gather, turning a clear complexion dull, texturized, and uneven. COSRX The Vitamin C 13 Serum 20ml : Vitamin C 13 blocks this degradation pathway by delivering pure, bio-compatible antioxidants directly into the skin's micro-relief layers.

The core clinical efficacy of this daily treatment relies on a targeted 13% Pure Vitamin C (Ascorbic Acid). This specific percentage offers the perfect therapeutic threshold: it provides robust radical-scavenging action and fades discoloration effectively while remaining exceptionally kind to fragile or easily flustered skin barriers. To maximize the stability and potency of the formula, the solution creates a synergistic shield by combining Ascorbic Acid with Tocotrienol (Super Vitamin E), which boosts the formula's antioxidant performance exponentially. Supported by high-purity Allantoin to lower localized skin heat and Sodium Hyaluronate to maintain a healthy moisture reservoir, this dermatologist-tested serum converts a tired, blotchy surface into a deeply resilient, uniform, and beautifully clear skin baseline.

  • Optimal 13% Ascorbic Acid Core: Supplies a highly safe, effective concentration of pure Vitamin C to fade localized discoloration and boost overall skin brightness without barrier irritation.
  • Super Vitamin E Antioxidant Synergy: Infuses high-performance Tocotrienol, a specialized form of Vitamin E that acts with significantly higher efficiency than standard variants to neutralize oxidative stress.
  • Multi-Weight Hydration Fill: Utilizes Sodium Hyaluronate and clean humectants to plump out dehydration micro-lines and keep the intercellular lipid matrix intensely supple.
  • Flawless Tone Standardization: Works across multiple stages of skin pigmentation to clear away sallow surface build-up, leaving a uniform, healthy glow.

Key Ingredients

  • Ascorbic Acid (13%): Pure Vitamin C that visibly brightens uneven tone, minimizes early blemish marks, and promotes structural elasticity.
  • Tocotrienol (Super Vitamin E): A rare, highly potent lipid antioxidant that stabilizes Vitamin C while defending cell matrices against premature environmental aging.
  • Allantoin & Panthenol: Soothing, barrier-supporting compounds that lower thermal skin stress and protect fragile profiles from dryness.
  • Sodium Hyaluronate: A high-purity moisture binder that locks water molecules into the skin envelope to prevent dehydration tightness.

Full Ingredients List

Water, Ascorbic Acid, Butylene Glycol, Dipropylene Glycol, Tromethamine, Ethylhexyl Salicylate, 1,2-Hexanediol, Persea Gratissima (Avocado) Oil, Sodium Hyaluronate, Allantoin, Panthenol, Tocotrienol, Helianthus Annuus (Sunflower) Seed Oil, Daucus Carota Sativa (Carrot) Root Extract, Beta-Carotene, Tocopherol, Niacinamide, Squalane, Camellia Sinensis Leaf Extract, Morus Alba Root Extract, Portulaca Oleracea Extract, Glycyrrhiza Glabra (Licorice) Root Extract, Adenosine, Hydrogenated Lecithin, Cholesterol, Xanthan Gum, Ethylhexylglycerin, Ammonium Acryloyldimethyltaurate/VP Copolymer, Sodium Bisulfite, Disodium EDTA

  • Step 1: Use during your morning (AM) or evening (PM) routine immediately after completing your initial cleansing and toner steps. (AM use is highly recommended to protect against daytime sun damage).
  • Step 2: Gently shake the bottle 1 to 2 times before opening, then dispense 2 to 3 drops of the fluid serum directly onto your face or clean palms.
  • Step 3: Smooth the formula evenly over your cheeks, forehead, and neck contours, gliding outward from the center along the skin's natural lines.
  • Step 4: Pat softly with your fingertips until completely absorbed, then follow with a daily moisturizer to seal the active matrix in place.

⚠️ Crucial Storage & Sun Protection Guidelines: Due to the high purity of Ascorbic Acid, always apply a broad-spectrum sunscreen of SPF 30 or higher during the day to safeguard your results. Store the bottle upright in the refrigerator or a cool, dark place away from direct sunlight immediately after opening, and use within two months to prevent product oxidation.

FAQs

Authenticity is our top priority. All items are sourced exclusively from highly trusted, authorized supply chains and official distributors in South Korea. We strictly verify, carefully inspect, and securely package every single product to guarantee 100% authenticity and optimal freshness before it leaves our facility.

We ship worldwide directly from our fulfillment operations in South Korea. We offer a flat rate of $6.99 for orders under $69, and provide 100% Free Shipping for orders $69 and above. Delivery typically takes 7–14 business days, depending on your local customs clearance and location.

Your payment security is our top priority. We safely accept all major international credit cards (Visa, MasterCard, American Express, Discover), Apple Pay, and Google Pay. Every transaction is encrypted and securely processed through Shopify Payments, adhering to the highest industry standards to ensure your personal and financial information remains 100% protected.

You can request a cancellation within 24 hours of placement, provided the order has not yet been processed for shipping. For returns, we accept items within 7 days of delivery, provided they are completely unopened, unused, and in their original packaging. Please note that for all returns, the customer is responsible for all associated costs, including original shipping, return shipping, and any customs clearance fees. Contact our support team at info@seoul-luma.com with your order number to initiate the process.

Yes, absolutely. Once your package is dispatched from our global fulfillment center, an automated shipping confirmation email containing your tracking number and a tracking link will be sent to you immediately. You will be able to monitor your package's journey in real-time from South Korea straight to your doorstep.

Complete your Routine

Build Your Perfect K-Beauty Routine

Choose your skin concern and get personalized product recommendations