COSRX
The Vitamin C 23 Serum
The Vitamin C 23 Serum
20 mL
Details
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How to usePreferably AM
AM
PM
Follow the product’s directions for the amount and frequency of application.
COSRX The Vitamin C 23 Serum is the higher-strength pure-vitamin-C option for people who already tolerate ascorbic acid and want targeted care for dullness and uneven-looking tone. Its 23% concentration deserves a gradual approach.
Ascorbic acid is paired with moisturising and antioxidant ingredients, including vitamin E forms. Vitamin C supports antioxidant defence and has a role in collagen biology. More concentrated does not automatically mean more effective for every skin: formulation stability and the ability to use it comfortably matter.
I would consider it after a lower-strength formula, not as the default starting point for reactive skin. Begin a few mornings weekly and finish with sunscreen. Avoid initially combining with retinoids or strong acids. Follow the pack’s mixing and storage directions; substantial darkening or changes in smell or texture can indicate deterioration.
Suited for
- Experienced pure-vitamin-C users.
- Dullness or uneven-looking tone.
- Skin tolerating a high-strength ascorbic acid serum.
For a lower-concentration alternative, compare COSRX The Vitamin C 13 Serum.
Key ingredients
Key ingredients
ASCORBIC ACID
L-ascorbic acid (a.k.a.ascorbic acid), has been extensively studied for its benefits to the skin. Using concentrations of 5-20% it can improve the appearance of various signs of aging caused by sun damage, such as wrinkles, discolorations, and loss of firmness. Additionally, even lower concentrations of 0.3-2% can offer advantages such as improving uneven skin tone, reducing fine lines, and increasing the skin's antioxidant capacity.
SODIUM HYALURONATE
It's a salt form of a famous hyaluronic acid (HA), a natural moisturising factor (NMF).It is more stable and has lower molecular weight than HA, therefore penetrates deeper into the epidermis (till stratum granulosum). It rejuvenates the skin by reinforcing and stimulating natural HA production in the epidermis.
TOCOPHEROL
It is a fat soluble vitamin, also called as vitamin E, a very powerful antioxidant. Antioxidants protect the skin from damaging free radicals, that attack the skin and cause inflammation and cellular damage. By doing so antioxidants are main ingredients preventing aging.
INCI
INCI
Water, Ascorbic Acid(23%), Propanediol, Dimethicone, Tromethamine, Panthenol, Ethyl Ascorbyl Ether, Squalane, Caffeine, Sodium Chloride, Sodium Hyaluronate, Sodium Sulfite, Disodium EDTA, Glutathione, Adenosine, Acetyl Glucosamine, Gardenia Florida Fruit Extract, Allantoin, Dextrin, Tocotrienols, Tocopherol, Elaeis Guineensis (Palm) Oil, Butylene Glycol, Arginine, Niacinamide, Pentylene Glycol, Alcohol Denat., Helianthus Annuus (Sunflower) Seed Oil, Glycyrrhiza Glabra (Licorice) Root Extract, Methyl Trimethicone, Carthamus Tinctorius (Safflower) Seed Oil, Camellia Japonica Seed Oil, Daucus Carota Sativa (Carrot) Root Extract, Beta-Carotene
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Pro Tips
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