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COSRX The Vitamin C 23 Serum, Main, color,
COSRX The Vitamin C 23 Serum, Alternate, color,
COSRX The Vitamin C 23 Serum, Alternate, color,
COSRX The Vitamin C 23 Serum, Alternate, color,

The Vitamin C 23 Serum

COSRX

$25.00Current Price $25.00
0.67 oz
GET $40 OFF next purchase + 5% off every Rack purchase with a Nordstrom credit card. Terms apply. Apply Now

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Highlights

  • Vitamin C
  • Good for: Acne & blemishes
  • Good for: Dullness

Details & care

What it is: A pure vitamin C antioxidant brightening serum with high performance for preventing early signs of aging.

What it does: The serum helps fade scars, brighten skin and diminish fine lines and wrinkles.

Research results:

In a clinical trial on 20 subjects, over 4 weeks:

- 16.26% improvement of pigmentation (visible melasma and blemishes)

- 32.89% improvement of triple-complexion skin tone (red skin tone)

- 32.36% improvement of triple-complexion skin tone (skin radiance)

- 16.36% improvement of elasticity (internal elasticity)

- 38.65% improvement of the pore (volume)

- 27.18% improvement of the pore (count)

- 4.18 % improvement of skin age

How to use: Use the serum immediately and refrigerate after opening. After cleansing, during the serum phase, shake the bottle lightly once or twice from side to side. Apply a few drops of the serum to skin. Use fingertips to gently massage and absorb the serum, starting from the inside of the face and working towards the edges. Keep the serum refrigerated.

  • 0.67 oz.
  • Item #10133860

Shipping & returns

This item qualifies for free shipping on orders over $89. View Shipping & Returns Policy.

This item is returnable within 40 days by mail or to U.S. Nordstrom Rack and U.S. Nordstrom stores. All beauty items are only eligible for return in U.S. Nordstrom Rack or U.S. Nordstrom stores.

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Reviews

(3668)
4.1 out of 5
Write a Review

Most helpful positive review

June 12, 2026
Best Vitamin C serum of
[This review was collected as part of a promotion.] Best Vitamin C serum of all! I’ve tried different brands before but this is by far the best!
Ritchell K.
Reposted from cosrx

Most helpful critical review

Sept 17, 2024
had to return
I honestly not sure how the product would have been if I continued to use, I had to return based on the smell. It was awful!
jessmar80
Verified purchase
Reposted from nordstrom.com

Customer photos

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5 stars
48%
4 stars
27%
3 stars
15%
2 stars
6%
1 star
4%
Sort by Most Helpful
Size
Ritchell K.
Reposted from cosrx
June 12, 2026
Best Vitamin C serum of
[This review was collected as part of a promotion.] Best Vitamin C serum of all! I’ve tried different brands before but this is by far the best!
Grace B.
Reposted from cosrx
June 9, 2026
This has been one of
[This review was collected as part of a promotion.] This has been one of my favourite Vitamin C serums. It has no fragrance which I enjoy and if you ease into it and use it in the correct skincare step order, over time it really does brighten and help with uneven skin tone I have found.
Molly P.
Reposted from cosrx
June 6, 2026
Use it every morning in
[This review was collected as part of a promotion.] Use it every morning in my routine. I pair it with the alpha arbutin serum and it has made great results by evening out my skintone and lessing acne spots and scars. The serum feels great on my skin and not sticky at all. I suggest pairing it with the alpha arbutin serum for maximizing results of evening the skintone.
Kate L.
Reposted from cosrx
May 31, 2026
It’s a very thin liquid
[This review was collected as part of a promotion.] It’s a very thin liquid and feels very nice on my face! I can’t tell yet if it’s making a difference in my skin texture or glowiness yet.
Danielle B.
Reposted from cosrx
May 20, 2026
So far I love this
[This review was collected as part of a promotion.] So far I love this product. My skin glows. At 40 everyone says I look 30. This is before they find out my age.
Ja’Daisa J.
Reposted from cosrx
May 14, 2026
My holy grail of a
[This review was collected as part of a promotion.] My holy grail of a vitamin C it’s lite but powerful this is a staple in my skincare routine!!! The packaging is cute as well!!
Load 6 more reviews

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