Skip to product information
COSRX The Vitamin C 13 Serum 20 ml for dull and uneven skin, brightening serum with 13% vitamin C to fade dark spots, improve radiance, and support skin clarity

COSRX The Vitamin C 13 serum 20ml

$17.99
Sale price  $17.99 Regular price 

A vitamin C serum for dull, uneven-looking skin that needs fresh radiance and brighter tone care.

Best for: Dullness, uneven tone, dark spots, post-blemish marks, tired-looking skin
Powered by: Vitamin C 13% and radiance-boosting serum care for brighter-looking skin
Feels like: Lightweight, fresh, concentrated, and easy to layer without a sticky finish
#VitaminCSerum #BrighteningCare #RadianceBoost

Free Shipping Over $69
100% Guaranteed Authenticity
Ships Directly from Korea

COSRX The Vitamin C 13 Serum is a gentle water-based vitamin C serum designed to improve dull-looking skin, support a brighter-looking complexion, and keep the skin feeling fresh and comfortable without heaviness.

Built with 13% pure vitamin C, 3-O-ethyl ascorbic acid, acetyl glucosamine, panthenol, sodium hyaluronate, and soothing support ingredients, this formula focuses on daily brightening care while maintaining a light watery finish. It works especially well for skin that looks tired, uneven, or dull and wants a fresher daily vitamin C step without stickiness.

This serum works especially well for skin that feels dull, uneven, dehydrated, or marked by visible dark spots and wants a lightweight daily brightening step. It is a strong fit for all skin types, especially normal, combination, and dull-looking skin.

• Texture: Non-sticky, lightweight, watery serum that absorbs well

• Skin Type: All skin types, especially normal, combination, and dull-looking skin

• Best For: Dullness, uneven-looking tone, dark spots, hyperpigmentation, and daily brightening care

• Key Benefit: 13% vitamin C serum with daily tone-refining care and fresh moisture support

• Volume: 20ml / 0.67 fl. oz.

• Origin: South Korea

• Helps improve dull-looking skin for a fresher and more radiant-looking complexion.

• Supports smoother-looking skin by improving the look of uneven tone and visible dark spots.

• Helps support a clearer-looking complexion with daily vitamin C brightening care.

• Replenishes light moisture so skin feels soft and comfortable instead of dry.

• Works well for people who want a vitamin C serum that feels fresh and easy to layer.

• Leaves skin feeling smooth, clear, and comfortably radiant with regular use.

— Key Ingredients —

• Ascorbic Acid (13%): Helps improve discoloration and uneven-looking skin tone.

• 3-O-Ethyl Ascorbic Acid: Helps reinforce brightening care and supports a clearer-looking complexion.

• Acetyl Glucosamine: Helps support smoother-looking skin and improve overall tone care.

• Hyaluronic Acid + Allantoin + Panthenol: Help keep skin hydrated, soft, and more comfortable during daily vitamin C care.

— Full List —

Water, Ascorbic Acid (13%), Butylene Glycol, Dipropylene Glycol, Tromethamine, 3-O-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

• Step 1: Cleanse your skin and apply toner.

• Step 2: Apply a few drops of serum to the skin.

• Step 3: Use your fingertips to gently massage and absorb the serum, starting from the inside of the face and working toward the edges.

• Tip: Use when skin looks dull, uneven, or tired and needs a fresh daily brightening boost.

Complete your Routine

Build Your Perfect K-Beauty Routine

Choose your skin concern and get personalized product recommendations