Skip to content

Cart

Your cart is empty

Get 10% Off Your First Order

Join the GlamGlobal community and be the first to discover new K-beauty launches, J-beauty innovations and exclusive offers. Plus enjoy 10% off your first order when you subscribe.

COSRX The Vitamin C 23% Serum - 20ml

Sale price£20.95

Taxes VAT & duties included — no surprise fees at delivery

Offer

Buy any 2 Wellness or K-Beauty items, get 15% off the lower-priced one. Applied automatically in your basket. Find a second item

✓ 100% Authentic · sourced from authorised suppliers
✓ Free UK delivery on orders over £50
✓ 30-day returns on unopened items · 24,000+ customers since 2021


A high-strength serum with 23% pure vitamin C that brightens and evens the look of tone. 20ml.

COSRX The Vitamin C 23% Serum delivers 23% pure vitamin C (L-ascorbic acid) to brighten the look of dull, uneven skin, help fade the look of dark spots and boost radiance, for a clearer, more even, glowing complexion. A potent daily brightening treatment.

Key details

  • Format: high-strength vitamin C serum
  • Size: 20ml
  • Key ingredient: 23% pure vitamin C (L-ascorbic acid)
  • Targets: the look of dark spots, uneven tone and dullness
  • Skin type: all; introduce gradually if new to high-strength vitamin C

How to use: In the morning, apply a few drops to clean skin before moisturiser. Always follow with SPF. A slight tingle can be normal; patch-test if sensitive.

Who it's for: Anyone wanting a potent vitamin C brightening serum.

Genuine COSRX. 20ml. Fast, fully tracked UK delivery.

COSRX The Vitamin C 23 Serum 20ml - Glam Global UKCOSRX
COSRX The Vitamin C 23% Serum - 20ml Sale price£20.95
Free UK DeliveryOn orders over £50
100% AuthenticSourced from authorised suppliers
30-Day ReturnsOn unused, unopened items
24,000+ CustomersShopping with us since 2021
As Seen InElle UK, Women's Health & Marie Claire