COSRX The Vitamin C 23 Serum (20 ml)

A serious brightness boost for skin that's ready for it. COSRX's strongest vitamin C serum packs 23% pure vitamin C into a tiny bottle, for skin that looks dull, uneven or marked by old spots.

Where it fits

Serum step: after toner, before moisturizer. Best in the morning, followed by sunscreen.

Good for

• Dullness and uneven-looking tone
• The look of dark spots and post-breakout marks
• Experienced vitamin C users who want more strength

Key ingredients

• 23% pure vitamin C: the brightening workhorse
• Vitamin E: supports and stabilizes vitamin C
• Hyaluronic acid: keeps skin comfortable and hydrated

How to use

Shake gently. Apply 2–3 drops to clean, dry skin and pat in. Start every other morning and build up to daily.

Good to know

• A tingle is normal with strong vitamin C. If it stings or turns red, use less often or switch to a lower strength.
• Patch test first. Not for broken or freshly exfoliated skin.
• Close tightly and keep away from heat and light.

Details: 20 ml · Made in Korea · Genuine COSRX