CosRx Advanced The Vitamin C 23 Serum 20g
K-Beauty › Serums & ampoules
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About this product
COSRX Advanced The Vitamin C 23 Serum 20g is a high-performance skincare serum specifically formulated to target skin dullness, uneven tone, and visible signs of aging. Combining COSRX’s signature scientific approach with the power of pure Vitamin C, this serum features an impressive 23% concentration of L-Ascorbic Acid and 3-O-Ethyl Ascorbic Acid, delivering rapid skin-brightening effects and helping to boost skin radiance. The advanced double-layered formula synergizes water and oil elements, ensuring optimal moisturization and reducing the risk of oxidation—preserving the efficacy of the Vitamin C throughout use.
Renowned for its minimal but effective ingredient lists, COSRX incorporates nourishing botanical extracts such as Gardenia Florida Fruit, Sunflower Seed, Safflower Seed, Camellia Japonica Seed, and Carrot Root, which collectively support antioxidant defense and soothe the skin. The inclusion of skincare actives like Niacinamide and Panthenol adds extra skin rejuvenating and barrier-strengthening benefits. This serum is suitable for both men and women looking to enhance their skincare routines with a powerful, research-driven Korean beauty solution.
Highlights
- Brightening
- Anti-aging
- Antioxidant Protection
- Moisturizing & Nourishing
Product details
Benefits
- Brightening: Highly concentrated 23% Vitamin C formula helps reduce the appearance of dark spots and uneven skin tone, revealing a clearer, more luminous complexion.
- Anti-aging: Targets visible signs of aging like fine lines and wrinkles, supporting skin firmness and elasticity.
- Antioxidant Protection: Shields skin from environmental stressors such as UV rays and pollution through potent antioxidant ingredients.
- Moisturizing & Nourishing: The double-layered formula delivers hydration and helps reinforce the skin's natural moisture barrier, leaving skin supple and revitalized.
- Non-comedogenic: Suitable for various skin types, including combination and oily skin, without clogging pores.
Suitable For
- Adults seeking to address skin dullness, uneven tone, or early signs of aging.
- All skin types, particularly those lacking radiance or experiencing pigmentation.
- Unisex formulation makes it ideal for both men and women.
- Recommended for users aged 18 and above.
Suggested Usage
For best results, apply the CosRx Advanced The Vitamin C 23 Serum as follows:
- Gently shake the bottle 1-2 times to mix the double-layered formula before each use.
- Dispense an appropriate amount of serum and spread evenly across cleansed skin, avoiding the eye area.
- Allow the serum to absorb completely before layering other products.
- For daytime application, always follow with a broad-spectrum sunscreen of SPF 30 or higher to maximize protection and efficacy.
- Begin with patch testing on unbroken skin if you are new to Vitamin C or have sensitive skin.
Product Specifications
SpecificationDetails Size20g IngredientsAqua/Water, Ascorbic Acid (23%), 3-O-Ethyl Ascorbic Acid, Butylene Glycol, Dimethicone, Panthenol, Squalane, Sodium Hydroxide, Caffeine, Sodium Hyaluronate, Sodium Metaphosphate, Adenosine, Acetyl Glucosamine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Tocotrienols, Tocopherol, Elaeis Guineensis (Palm) Oil, Arginine, Niacinamide, Pentylene Glycol, Glutathione, Helianthus Annuus (Sunflower) Seed Oil, Methyl Trimethicone, Carthamus Tinctorius (Safflower) Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa (Carrot) Root Extract, Glycyrrhiza Glabra (Licorice) Root Extract, Beta-Carotene UPC8800311121256 FormulationDouble-layered (water & oil) serum BrandCOSRX Country of OriginSouth KoreaAdditional Information
- Store tightly closed in a cool, dry place away from direct sunlight to maintain optimal stability of Vitamin C.
- Double-layered packaging helps prevent oxidation for longer shelf life.
- May be used in combination with COSRX’s other skincare products, though avoid layering with AHA/BHA or retinoids to minimize skin irritation.















