COSRX The Vitamin C 13 Serum 20ml

13% pure ascorbic acid — the daily brightening workhorse. A potent vitamin C serum with stabilized 13% ascorbic acid, niacinamide, and vitamin E — fades dark spots, evens tone, and refines pores over 6-12 weeks.

What it does:

• Fades dark spots over 6-12 weeks
• Brightens overall skin tone
• Refines visible pore size
• Builds antioxidant defense against daily UV damage

Key ingredients:

• L-Ascorbic Acid 13% — gold-standard vitamin C for tone correction
• Niacinamide — pairs with vitamin C to amplify brightening
• Tocopherol (Vitamin E) — stabilizes vitamin C and adds antioxidant protection

How to use: AM after toner. Press 2-3 drops into clean skin. Follow with moisturizer and SPF. Start every other day, build to daily.

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