COSRX The Vitamin C 23 Serum (0.68 fl.oz)
COSRX The Vitamin C 23 Serum (0.68 fl.oz)
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COSRX

COSRX The Vitamin C 23 Serum (0.68 fl.oz)

4.1 stars out of 3837 reviews
(4.1)|
3,837 ratings

Key item features

  • The 23% highly concentrated stabilized pure vitamin C serum improves skin tone, reduces wrinkles, and targets dull and rough skin as a vitamin C booster. This serum is highly effective, and to slowly prevent oxidation, it is divided into two layers with oil on top of the serum, providing a moisturizing finish.
  • Recommended for COSRX The vitamin C 23 serum is ideal for those who have experience with vitamin c, seek powerful effects in a short time, and desire a special intensive care treatment.
  • Target concerns - Hyperpigmentation - Anti aging - Dullness - Uneven skin tone - Dark spots Texture The oil and pure vitamin c layers blend together and absorb smoothly into the skin, leaving it more supple and radiant. If you experience any stickiness, try adding a bit of moisturizer Color It has a yellowish tint, indicating that it contains pure vitamin C and oil.
Current price is $25.00
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Columbus, 43215
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Sold by COSRX Official
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4.681818181818182 stars out of 5, based on 66 seller reviews(4.7)
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Customer ratings & reviews

4.1 out of 5 stars
stars3,837 ratings3,645 reviews
How item rating is calculated
  1. 5 stars50% (1,900)
  2. 4 stars27% (1,018)
  3. 3 stars14% (543)
  4. 2 stars6% (217)
  5. 1 star4% (159)

Reviews summary

Pros
  • : Has a gentle texture when applied.
  • : Helps to lighten and reduce their appearance.
  • : Absorbs into skin fast and easily.
  • : Applies easily to the skin.
  • : Part of daily skincare process.
Cons
  • : Product has a potent odor.
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Showing 1-3 of 3,645 reviews

Jun 5, 2025
Florentyna
5 out of 5 stars review

Great serum for sensitive acne prone skin

I used this serum daily in the am followed by 50spf sunscreen. I noticed a visible reduction in my acne scars and fewer breakouts from week 2. I cant recommend this enough for my fellow acne prone girls.

International review
Review from walmart.ca
Helpful?2VK85PCD362D1410548182
Feb 11, 2025
Lindsey
Sold byCOSRX OfficialDelivered byWalmart
5 out of 5 stars review

Verified Purchase

I'd recommend anyone to give it a try

Has really helped my acne! Pleasantly suprised. Didn't make it ALL go away but probably 50-60% so far. Having such a high concentration, idk how sensitive skin would react since my skin is weirdly tolerant to literally everything and anything I put on it, so probably beware if you have sensitive skin because even on my skin it stung slightly (but that's it).

Helpful?2VK85PCD362D1410548182
Nov 16, 2025
Shawna P.
5 out of 5 stars review

I decided to use Advanced

[This review was collected as part of a promotion.] I decided to use Advanced The Vitamin C23 Serum every other day to go easy on my skin in case there was any sensitivity. (I already have and use a daily and nightly regimen of COSRX products) So, I have only used Advanced The Vitamin C23 Serum 4 times in 8 days,and WOW WOW WOW! It works beautifly, I have a dark brown 'age spot' on my cheek that came with the beauty of pregnancy, and I kid you not, this spot has almost completely faded away in just 4 applications! Also, my husband said to me last night, "I can tell the new stuff is really working, already, your skin (texture and glow) looks like a teenager's" So yes, it really really works and is very gentle on my skin, no irritation at all. In fact very calming and soothing on my skin with every other day use. I love this product! Perfect formula, please don't ever change it.

Review from cosrx
Helpful?2VK85PCD362D1410548182