Cosrx The Vitamin C 23 Serum 20ml

COSRX The Vitamin C 23 Serum 20ml is a high-strength brightening serum designed for those who are already comfortable using vitamin C and want to take their routine a step further. The lightweight, smooth formula combines 23% pure vitamin C with Super Vitamin E, glutathione, niacinamide and hydrating ingredients such as hyaluronic acid and panthenol. It works to soften the look of uneven tone, dullness and early fine lines while helping skin feel more supple and refreshed.

Used after cleansing and toning, just a few drops of this serum may help to promote a more radiant-looking complexion and a smoother skin texture over time. The texture absorbs quickly without feeling heavy, making it easy to layer under your usual moisturiser and daily SPF. With regular use, it supports a brighter, more luminous appearance and can slot into an existing routine as a targeted step for those concerned with lack of radiance, dark spots and the first visible signs of ageing.

Why we love it
- High-strength 23% pure vitamin C formula that helps to brighten dull, uneven-looking skin
- Antioxidant blend with Super Vitamin E, glutathione and niacinamide that supports a more radiant, refined complexion
- Lightweight texture that absorbs quickly and layers well under moisturiser and SPF in a daily routine
- Specially packaged and designed to be refrigerated to help maintain freshness and stability of the vitamin C

How to use
How to Use:
After cleansing and toning, prepare the skin so it’s clean and dry. Shake the bottle lightly from side to side, then apply 2–3 drops of serum to the face. Gently smooth or pat the formula over the skin, avoiding the eye area, and follow with moisturiser and SPF in the daytime.

Frequency:
Use once daily or as needed, according to the product instructions and your skin’s tolerance.

Application Technique:
Dispense a small amount onto fingertips and apply evenly over the face, working from the centre outwards. Allow the serum to absorb fully before layering other skincare products.

Best Practices:
Apply to freshly cleansed skin and always follow with a broad-spectrum sunscreen in the morning. Avoid using in the same routine as strong acids, retinol or copper peptide products. Store the bottle upright in the refrigerator and use within the recommended period after opening.

Safety Tips:
For external use only. Avoid direct contact with eyes; if contact occurs, rinse well with water. Patch test before first use and reduce frequency or discontinue use if irritation occurs. Keep out of reach of children and follow the directions on the packaging.

water, ascorbic acid (23%), propanediol, dimethicone, tromethamine, panthenol, 3-o-ethyl ascorbic acid, 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

How to Use:
After cleansing and toning, prepare the skin so it’s clean and dry. Shake the bottle lightly from side to side, then apply 2–3 drops of serum to the face. Gently smooth or pat the formula over the skin, avoiding the eye area, and follow with moisturiser and SPF in the daytime.

Frequency:
Use once daily or as needed, according to the product instructions and your skin’s tolerance.

Application Technique:
Dispense a small amount onto fingertips and apply evenly over the face, working from the centre outwards. Allow the serum to absorb fully before layering other skincare products.

Best Practices:
Apply to freshly cleansed skin and always follow with a broad-spectrum sunscreen in the morning. Avoid using in the same routine as strong acids, retinol or copper peptide products. Store the bottle upright in the refrigerator and use within the recommended period after opening.

Safety Tips:
For external use only. Avoid direct contact with eyes; if contact occurs, rinse well with water. Patch test before first use and reduce frequency or discontinue use if irritation occurs. Keep out of reach of children and follow the directions on the packaging.

- High-strength 23% pure vitamin C formula that helps to brighten dull, uneven-looking skin
- Antioxidant blend with Super Vitamin E, glutathione and niacinamide that supports a more radiant, refined complexion
- Lightweight texture that absorbs quickly and layers well under moisturiser and SPF in a daily routine
- Specially packaged and designed to be refrigerated to help maintain freshness and stability of the vitamin C