Advanced The Vitamin C 23 COSRX

COSRX Advanced The Vitamin C 23 Serum is a high-potency antioxidant serum from Korean cosmetics formulated with 23% pure vitamin C (ascorbic acid) to help brighten skin, reduce blemishes, improve texture, and fight the first signs of aging. Its advanced formula combines stabilizing antioxidants and hydrating ingredients to maximize vitamin C's effectiveness while improving skin tolerance.

This serum is especially designed for those seeking visible results on hyperpigmentation, post-acne marks, lack of radiance, and loss of firmness, making it one of the most powerful and popular vitamin C treatments in the Korean routine.

✨ Key ingredients and their functions

Pure Vitamin C 23% (Ascorbic Acid) – High concentration of pure vitamin C that helps reduce spots, brighten skin, stimulate collagen synthesis, and improve skin texture.

Super Vitamin E (Tocotrienol) – Powerful antioxidant that helps protect against oxidative stress and enhance the stability and efficacy of vitamin C.

Glutathione – Brightening antioxidant that helps improve luminosity and combat dull skin tone.

Niacinamide (Vitamin B3) – Helps even out tone, improve blemishes, and strengthen the skin barrier.

Hyaluronic Acid (Sodium Hyaluronate) – Provides deep hydration and a plumping effect, helping to keep skin supple and comfortable.

Allantoin & Panthenol – Soothing ingredients that help reduce irritation and improve the formula's tolerance.

💧 Main benefits

✨ Intensely brightens skin and provides a glow effect.
🌟 Helps reduce spots and post-acne marks.
🛡️ Antioxidant protection against photoaging.
💦 Improves firmness, elasticity, and texture.
🧼 Helps refine pores and smooth irregularities.

🧴 How to use

Apply 2-3 drops to clean, dry skin after toner.

Gently spread, avoiding the eye contour.

Follow with moisturizer.

Preferably use in the morning, always accompanied by sunscreen.

Store in the refrigerator after opening to minimize vitamin C oxidation.

✔️ Skin type

Suitable for most skin types.
Especially recommended for dull skin, with spots, post-acne marks, or signs of aging.

⚠️ For sensitive skin or skin not accustomed to potent vitamin C, it is recommended to introduce it gradually.

🚫 Formula and sensations

Light and concentrated texture, fast-absorbing.
May generate a slight warming or tingling sensation due to the high concentration of vitamin C.
Luminous and healthy finish without a heavy greasy effect.

📦 Content: 20 ml

💡 Extra tip: If this is your first potent vitamin C, start using it 2-3 days a week and combine with soothing ingredients like ceramides, centella asiatica, or panthenol to improve skin tolerance.