Cosrx The Vitamin C 23 Serum 20ml - Korean Skin Care Hyaluronic Acid Serum

Potent Brightening and Firming Serum

Cosrx The Vitamin C 23 Serum is a high-potency korean skin care treatment engineered to target hyperpigmentation, fade post-acne marks, and smooth fine lines. Formulated with 23% pure L-Ascorbic Acid alongside a hydrating hyaluronic acid serum base, this formula brightens dull skin while restoring firmness and elasticity. Its specialized oil-and-water dual-layer design seals in active freshness to keep the serum stable, making it a powerful addition to your daily korean skincare routine.

Key Ingredients & Benefits

• 23% Pure Vitamin C (L-Ascorbic Acid): Delivers powerful antioxidant activity to visibly diminish dark spots, reduce wrinkles, improve skin elasticity, and brighten dull complexions.
• Super Vitamin E (Tocotrienols): Features 50 times higher antioxidant activity than standard tocopherol to help stimulate collagen production.
• Hyaluronic Acid: Provides strong moisture retention properties to maintain deep skin hydration throughout the day.
• Allantoin: Soothes skin and relieves irritation to keep the skin barrier feeling calm.

How to Use

1. Replace the standard bottle cap with the included dropper applicator.
2. Lightly shake the bottle 1 to 2 times to blend the dual-layer formula.
3. Apply 2 to 3 drops evenly to clean skin during your morning or evening routine.
4. Gently pat into the skin until absorbed. Always apply a broad-spectrum sunscreen (SPF 30+) during daytime use.

Storage & Care

To preserve freshness and slow down active oxidation, store your 20ml bottle in the refrigerator after opening.

People Also Ask

Is 23% Vitamin C too strong for beginners or sensitive skin?
At 23% pure L-Ascorbic Acid, Cosrx The Vitamin C 23 Serum is an advanced high-strength treatment. First-time Vitamin C users or those with sensitive skin should perform a patch test first and introduce it gradually into their routine 2 to 3 times per week before increasing usage.

How do I store Cosrx Vitamin C 23 Serum to prevent oxidation?
The formula uses a dual-layer structure to preserve Vitamin C stability, but storing the bottle in the refrigerator after opening helps prevent premature browning and maintains peak potency.

Can I use Cosrx Vitamin C 23 Serum with peptides or retinol?
Yes, this serum layers well with hydrating peptide boosters during your morning routine. High-potency active ingredients like retinol are best reserved for evening use to prevent skin sensitivity.

[Cosrx] The Vitamin C 23 serum 20ml