COSRX Advanced The Vitamin C 23 Serum 20g
COSRX Advanced The Vitamin C 23 Serum 20g
Why it's here: the strongest pure vitamin C serum in Korean skincare, at a price that makes sense.
The Vitamin C 23 Serum carries 23% pure ascorbic acid, stabilised in a dual-structure formula. Used daily, it helps dark spots and post-blemish marks look lighter and gives dull skin back its glow. A little tingling at first is normal; it settles within a couple of weeks.
Key ingredients
- Pure vitamin C (ascorbic acid) 23%
- Vitamin E and allantoin to buffer it
How to use
Morning or night, after toner: 2 to 3 drops on dry skin, avoiding the eye area. Keep the cap tight and the bottle out of light. Sunscreen every morning.
Good for
Dullness, dark spots and uneven tone. Sensitive skin should start three times a week.
Authentic COSRX, bought in Seoul per order. Ships in 2 to 4 business days, then 3 to 5 days to Canada or the US.