COSRX The Vitamin C 23 Serum 20ml

The Vitamin C serum that actually fades dark spots — 23% potency, finally bearable on sensitive skin. COSRX's cult-favorite serum that delivers clinical-strength brightening with a buffered formula designed for K-beauty's sensitive-skin crowd.

What it does:

• Visibly fades dark spots and post-acne marks in 6–8 weeks
• Brightens dull, fatigued skin from the first week
• Powerful antioxidant protection against pollution + UV damage
• Buffered to reduce typical Vitamin C sting

Key ingredients:

• L-Ascorbic Acid 23% — clinical-strength pure Vitamin C
• Hyaluronic Acid — hydrates so the active doesn't dry skin
• Allantoin — soothes through the brightening

How to use: Apply 2–3 drops to clean, toned skin. Pat in. AM only — always followed by SPF50+. Start every other day to build tolerance; build to daily.

30-day money-back guarantee — keep the product. Free shipping in Canada over $99.