COSRX Advanced The Vitamin C 23 Serum

Description

Pure vitamin C is one of the most effective brightening ingredients in skincare, but it is also one of the most unstable. COSRX addresses that with a three ingredient antioxidant network, pairing 23 percent pure vitamin C with super vitamin E and glutathione so each ingredient works to support and extend the effectiveness of the others. The result is a high concentration serum formulated to feel gentler than its potency suggests.

Pure Vitamin C (23% Ascorbic Acid)
The active core of this serum, pure vitamin C helps protect skin from daily stressors, supports a firmer feel and works to improve the look of persistent dullness for a clearer, more even toned complexion.

Super Vitamin E and Glutathione
This antioxidant duo supports the vitamin C in the formula. Vitamin E helps neutralize free radicals, while glutathione works to help regenerate active vitamin C, keeping the antioxidant network working together rather than each ingredient acting alone.

Niacinamide and Adenosine
Niacinamide contributes brightening support, while adenosine helps boost the look of firmness, rounding out the serum’s approach to tone and texture.

Panthenol, Hyaluronic Acid and Allantoin
These soothing, moisture binding ingredients help keep skin comfortable and hydrated, balancing the high concentration actives so the formula feels supportive rather than harsh.

In clinical testing, this serum showed improvement across a wide range of concerns, including pigmentation, skin clarity, tone, blemishes, radiance, pores, wrinkles, texture and elasticity. After cleansing and toning, shake the bottle gently, apply two to three drops to the entire face and pat in for absorption. Follow with moisturizer, and sunscreen during the day. As this is a high concentration formula, avoid layering with copper peptide products or other high strength actives like retinol.

Key Benefits

• Formulated with 23 percent pure vitamin C for high potency brightening
• Supported by an antioxidant network of super vitamin E and glutathione
• Contains niacinamide and adenosine for tone and firmness support
• Hydrates and soothes with panthenol, hyaluronic acid and allantoin
• Clinically tested to improve the look of pigmentation, texture and radiance
• Best suited for those already experienced with vitamin C actives