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BESKN

COSRX

The Vitamin C 23 Serum

Category
Serum
Barcode
8809598454651
Fragrance-free

How to use

Apply a few drops to clean, dry skin, avoiding the immediate eye area, then follow with moisturizer. High-strength L-ascorbic acid can sting or cause tingling, especially on sensitive skin, so start a few times per week and patch-test first. Vitamin C can increase sun sensitivity and oxidizes with light and air, so pair with a broad-spectrum SPF every morning and keep the bottle tightly closed and away from heat. Slight color darkening over time is normal oxidation; discontinue if irritation persists.

Ingredients

Listed in the order shown on the packaging.

  1. Water
    1
    Generally well tolerated

    What it does

    Solvent

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  2. Ascorbic Acid
    2
    Worth knowing

    What it does

    Skin conditioning Antioxidant

    Concerns to know

    • Potential irritant

      May cause irritation for sensitive skin, particularly at higher concentrations.

    View ingredient →
  3. Propanediol
    3
    Generally well tolerated

    What it does

    Humectant Solvent

    Concerns to know

    • Barrier & hydration support

      A well-studied humectant or emollient that helps hydrate the skin and support its moisture barrier.

    View ingredient →
  4. Dimethicone
    4
    Generally well tolerated

    What it does

    Emollient Skin conditioning Film forming

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  5. Tromethamine
    5
    Generally well tolerated

    What it does

    Buffering

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  6. Panthenol
    6
    Generally well tolerated

    What it does

    Humectant Soothing

    Concerns to know

    • Barrier & hydration support

      A well-studied humectant or emollient that helps hydrate the skin and support its moisture barrier.

    View ingredient →
  7. Ethyl Ascorbyl Ether
    7
    Generally well tolerated

    What it does

    Skin conditioning Antioxidant

    Concerns to know

    • Antioxidant

      Offers antioxidant activity that helps defend the skin against everyday oxidative stress.

    View ingredient →
  8. Squalane
    8
    Generally well tolerated

    What it does

    Emollient Skin conditioning

    Concerns to know

    • Barrier & hydration support

      A well-studied humectant or emollient that helps hydrate the skin and support its moisture barrier.

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  9. Caffeine
    9
    Generally well tolerated

    What it does

    Skin conditioning Antioxidant

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  10. Sodium Chloride
    10
    Generally well tolerated

    What it does

    Viscosity controlling Opacifying

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

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  11. Sodium Hyaluronate
    11
    Generally well tolerated

    What it does

    Humectant Skin conditioning

    Concerns to know

    • Barrier & hydration support

      A well-studied humectant or emollient that helps hydrate the skin and support its moisture barrier.

    View ingredient →
  12. Sodium Sulfite
    12
    Worth knowing

    What it does

    Antioxidant

    Concerns to know

    • Contact allergen

      Can act as a skin sensitiser for a minority of people; patch test if your skin is reactive.

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  13. Disodium EDTA
    13
    Generally well tolerated

    What it does

    Chelating agent

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  14. Glutathione
    14
    Generally well tolerated

    What it does

    Skin conditioning Antioxidant

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  15. Adenosine
    15
    Generally well tolerated

    What it does

    Skin conditioning Soothing

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

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  16. Acetyl Glucosamine
    16
    Generally well tolerated

    What it does

    Humectant Skin conditioning

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  17. Gardenia Fruit Extract
    17
    Generally well tolerated

    What it does

    Skin conditioning Antioxidant

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  18. Allantoin
    18
    Generally well tolerated

    What it does

    Soothing

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  19. Dextrin
    19
    Generally well tolerated

    What it does

    Emulsion stabiliser Viscosity controlling Film forming

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  20. Tocotrienols
    20
    Generally well tolerated

    What it does

    Skin conditioning Antioxidant

    Concerns to know

    • Antioxidant

      Offers antioxidant activity that helps defend the skin against everyday oxidative stress.

    View ingredient →
  21. Tocopherol
    21
    Generally well tolerated

    What it does

    Skin conditioning Antioxidant

    Concerns to know

    • Antioxidant

      Offers antioxidant activity that helps defend the skin against everyday oxidative stress.

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  22. Elaeis Guineensis (Palm) Oil
    22
    Worth knowing

    What it does

    Emollient Skin conditioning

    Concerns to know

    • Potentially pore-clogging

      Rated comedogenic in common references; may contribute to congestion for acne-prone skin.

    View ingredient →
  23. Butylene Glycol
    23
    Generally well tolerated

    What it does

    Humectant Solvent

    Concerns to know

    • Barrier & hydration support

      A well-studied humectant or emollient that helps hydrate the skin and support its moisture barrier.

    View ingredient →
  24. Arginine
    24
    Generally well tolerated

    What it does

    Humectant Skin conditioning Buffering

    Concerns to know

    • Barrier & hydration support

      A well-studied humectant or emollient that helps hydrate the skin and support its moisture barrier.

    View ingredient →
  25. Niacinamide
    25
    Generally well tolerated

    What it does

    Skin conditioning Soothing

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  26. Pentylene Glycol
    26
    Generally well tolerated

    What it does

    Humectant Solvent

    Concerns to know

    • Barrier & hydration support

      A well-studied humectant or emollient that helps hydrate the skin and support its moisture barrier.

    View ingredient →
  27. Alcohol Denat.
    27
    Worth knowing

    What it does

    Solvent Viscosity controlling

    Concerns to know

    • Drying alcohol

      A volatile alcohol that can compromise the skin barrier and dry the skin at high concentrations.

    • Caution for infants

      Better avoided on infant skin, which is thinner and more permeable; prefer fragrance-free, minimal formulas for babies.

    View ingredient →
  28. Sunflower Seed Oil
    28
    Generally well tolerated

    What it does

    Emollient Cleansing Skin conditioning

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

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  29. Licorice (Glycyrrhiza Glabra) Root Extract
    29
    Generally well tolerated

    What it does

    Skin conditioning Antioxidant Soothing

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  30. Methyl Trimethicone
    30
    Generally well tolerated

    What it does

    Emollient Solvent Skin conditioning

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  31. Carthamus Tinctorius Seed Oil
    31
    Generally well tolerated

    What it does

    Emollient Skin conditioning

    Concerns to know

    • Barrier & hydration support

      A well-studied humectant or emollient that helps hydrate the skin and support its moisture barrier.

    View ingredient →
  32. Camellia Japonica Seed Oil
    32
    Generally well tolerated

    What it does

    Emollient Skin conditioning

    Concerns to know

    • Well tolerated

      No significant safety concern is reported for this ingredient as used in cosmetics.

    View ingredient →
  33. Carrot Root Extract
    33
    Generally well tolerated

    What it does

    Emollient Skin conditioning Antioxidant

    Concerns to know

    • Antioxidant

      Offers antioxidant activity that helps defend the skin against everyday oxidative stress.

    View ingredient →
  34. Beta-Carotene
    34
    Generally well tolerated

    What it does

    Skin conditioning Antioxidant

    Concerns to know

    • Antioxidant

      Offers antioxidant activity that helps defend the skin against everyday oxidative stress.

    View ingredient →