1 10

COSRX

COSRX Advanced The Vitamin C 23 Serum 20ml

COSRX Advanced The Vitamin C 23 Serum 20ml

$33.95 AUD
$33.95 AUD
Sale Sold out
Taxes included. Shipping calculated at checkout.

Power-brightening 23% Vitamin C serum for radiant, firmer-looking skin.

Reveal a brighter, more even complexion with the COSRX Advanced The Vitamin C 23 Serum, a high-strength antioxidant serum formulated with 23% pure Vitamin C (L-Ascorbic Acid) to visibly reduce dark spots, post-acne marks and dullness. Enhanced with Super Vitamin E (Tocotrienol), Glutathione, Niacinamide and Hyaluronic Acid, this lightweight serum helps improve skin tone, support collagen production and leave skin looking smoother and more radiant.

Ideal for experienced Vitamin C users, the formula has been clinically tested for skin irritation and non-comedogenicity, making it suitable for blemish-prone skin while delivering powerful brightening benefits. It was also recognised as a 2023 Bustle Beauty Award Winner for its standout performance.

Key Benefits

  • Brightening – 23% pure Vitamin C helps visibly fade pigmentation, post-acne marks and uneven skin tone for a brighter complexion.
  • Firming – Vitamin C, Adenosine and antioxidant-rich Super Vitamin E help support collagen production to improve the appearance of fine lines and skin elasticity.
  • Antioxidant Protection – Super Vitamin E and Glutathione help defend skin against environmental stressors that contribute to premature ageing.
  • Hydrating – Hyaluronic Acid, Panthenol and Squalane replenish moisture to keep skin feeling soft, comfortable and balanced.
  • Skin Smoothing – Niacinamide and Allantoin help refine skin texture while soothing the skin for a healthier-looking complexion

Free From

Parabens, Sulphates, Mineral oils, Harsh fragrances, Essential oils, Drying alcohols, Artificial colourants.

Recommended For

- Best suited to normal, combination, oily and mature skin, as well as those concerned with pigmentation, acne marks, uneven skin tone and early signs of ageing.
- Due to its high 23% Vitamin C concentration, it is recommended for experienced Vitamin C users rather than beginners or very sensitive skin.

How to Use

1. Cleanse your face and apply toner if desired.
2. Apply 2–3 drops evenly over the face, avoiding the eye area.
3. Gently pat until fully absorbed.
4. Follow with moisturiser.
5. If used in the morning, always finish with a broad-spectrum SPF 50+ sunscreen.
6. Store the serum in the refrigerator after opening to help maintain Vitamin C stability and use within 2 months of opening for optimal freshness.

CAUTION: As this product contains a high concentration of Vitamin C, avoid using alongside high-strength retinol, exfoliating acids or copper peptides. For best results, use them at different times of day (morning/evening) to optimise absorption and maximise the benefits of each product.

For external use only. Perform a patch test before first use. If irritation occurs, stop use immediately and consult a healthcare professional.

Full Ingredients

Aqua/Water, Ascorbic Acid(23%), Butylene Glycol, Dimethicone, Panthenol, 3-O-Ethyl Ascorbic Acid, 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
View full details