COSRX The Vitamin C 23 Serum – 23% Pure Vitamin C Brightening Booster (20g)

• 23% Pure Vitamin C – High-strength formula for visible brightening and firmer skin

• Super Vitamin E + Glutathione – Enhances brightening and antioxidant protection

• Targets Multiple Concerns – Dullness, uneven tone, dark spots, fine lines, early aging, lack of radiance

• Clinically Tested – Non-comedogenic, sensitive skin irritation test, primary skin irritation test

• Lightweight Texture – Smooth absorption, layers of oil + serum for multi-layer hydration

• Hypoallergenic Tested

• Size: 20g / 0.67 fl. oz

How To Use

• Step 1 - After cleansing and toning, apply 2–3 drops to entire face
• Step 2 - Pat gently for better absorption
• Step 3 - Follow with moisturizer and SPF during the day

The COSRX The Vitamin C 23 Serum is a high-strength 23% pure vitamin C formula enhanced with Super Vitamin E and Glutathione to target uneven skin tone, early signs of aging, and dullness. Ideal for experienced vitamin C users seeking visible brightening and firmer skin, this serum absorbs smoothly to leave the complexion more radiant, supple, and revitalized.

Clinically formulated to deliver higher potency, improved elasticity, and multi-layer hydration beyond standard vitamin C serums. Tested by P&K Skin Research Center Co., Ltd. and Dermacosmetic Skin Science Laboratory (Korea). Hypoallergenic tested, non-comedogenic, and safe for sensitive skin.

Size: 20g / 0.67 fl. oz.

Usage Cautions

• Avoid mixing with retinol or acids in the same routine

• Requires care (storage, usage) due to high potency

• Must follow with SPF during daytime use

Recommended For

• Experienced vitamin C users

• Brightening dull skin, reducing wrinkles, improving elasticity

• Dark spots and post-breakout marks

• Fine lines and early signs of aging

• Lack of radiance and healthy glow

Safety Information

• For external use only

• Avoid direct contact with eyes

• Store in a cool, dark place to maintain potency

• Discontinue use if irritation occurs

• Keep out of reach of children