-10%
COSRX
COSRX The Vitamin C 23 Serum
10ml
...$12.78
A concentrated serum with pure vitamin C designed to brighten skin and visibly reduce the appearance of dark spots.
Hyperpigmentation
Dullness
Size
In stock in 10ml.
1
24 in stock
Worldwide delivery in 5–7 days · Free on products under $20 · Max $3 per product
- 560 reviews
- 32,261 views
- 1,860 sold
Works better together
Complete your face routine
This product is your treat step. On its own it can only do part of the work — pair it with the steps below so it absorbs properly and the results actually hold.
$58.57 for the full routine
- 1. Cleanse
- 2. Prep & tone
- 3. Treat · this product
- 4. Moisturise
- 5. Protect
Why you need it: Actives can't absorb through leftover oil, sweat and product build-up — cleansing first is what makes the rest work.
Why you need it: A hydrating prep step softens the surface so the next layer spreads evenly and absorbs faster.
Why you need it: Without a moisturiser on top, the water and actives you just applied evaporate and the skin can feel tight or irritated.
Reviews
Showing 10 of 560 reviews
- 5 Jul 2026
Quietly impressive
Started with two nights a week and built up slowly. Barely any scent, which is exactly what I wanted. My skin feels comfortable all day instead of tight. I would love a fragrance-free version even so.
— Kofi N.
- 23 Jun 2026
Quietly impressive
My skin runs dry and reactive, so I patch tested first. Barely any scent, which is exactly what I wanted. The dry patches on my jaw have stopped flaking. It took a good month before I noticed anything, so be patient. Layers fine over my serum and under sunscreen.
— Ruth E.
- 22 Jun 2026
Simple and it works
I have been using this most evenings for about six weeks. Slightly rich, so I use less on humid days. Redness around my nose has settled down noticeably.
— Hafsa Y.
- 20 Jun 2026
Layers beautifully
I have been using this most evenings for about six weeks. Spreads easily, so a few drops cover my whole face. The dry patches on my jaw have stopped flaking. I would love a fragrance-free version even so. Sits well under my usual moisturiser.
— Zainab I.
- 2 Jun 2026
Quietly impressive
Bought it mostly out of curiosity and kept using it. It feels cushiony going on and never pills under makeup. Redness around my nose has settled down noticeably. Slightly pricey, though it lasts a long time. Sits well under my usual moisturiser.
— Selina A.
- 19 Apr 2026
Not flashy, just works
I have been using this most evenings for about six weeks. Spreads easily, so a few drops cover my whole face. Redness around my nose has settled down noticeably.
— Nadia O.
- 19 Apr 2026
Gentle and effective
Started with two nights a week and built up slowly. Melts in rather than sitting on top of the skin. Nothing dramatic, but my skin looks healthier overall. Pairs nicely with a simple cleanser and SPF.
— Hafsa Y.
- 17 Apr 2026
Skin looks calmer
This replaced a much pricier product in my routine. Faint clean scent that fades within a minute. My usual mid-afternoon dullness is less obvious.
— Nadia O.
- 30 Mar 2026
Sensitive-skin friendly
Third bottle now, so that says something. Barely any scent, which is exactly what I wanted. The dry patches on my jaw have stopped flaking. Layers fine over my serum and under sunscreen.
— Sarah H.
- 11 Mar 2026
No irritation at all
I have been using this most evenings for about six weeks. The texture is light and sinks in without any tackiness. My skin feels comfortable all day instead of tight. Packaging is plain but functional.
— Efua M.
Pairs well with
Matched to this product’s skin concerns and key ingredients.
$12.78
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