The Vitamin C 23 Serum

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Product details

Web ID: 16842543

Hypoallergenic 23% pure vitamin C!

  • Product Features

    • WHAT IT IS:
    • An antioxidant brightening booster with high performance
    • WHAT IT DOES:
    • Fades acne scars and hyperpigmentation; brightens dull skin; firms and plumps; diminishes fine lines and wrinkles; targets dull skin, uneven skin tone, dark spots and hyperpigmentation
    • INGREDIENT HIGHLIGHTS:
    • 23% pure vitamin C (ascorbic acid) is an antioxidant that brightens (improves blemishes and brighten skin), reduces wrinkles and enhances elasticity
    • Super vitamin E (tocotrienol), which features 50 times higher antioxidant activities than tocopherol, stimulates collagen production
    • Hyaluronic acid has strong moisture-retention properties to help maintain hydration
    • Allantoin helps soothe and relieve irritation
    • HOW TO USE:
    • After cleansing, during the serum phase, shake the bottle lightly once or twice from side to side, then apply a few drops to the skin; use fingertips to gently massage and absorb the serum, starting from the inside of the face working toward the edges
    • This serum can be used in the morning and/or afternoon; if applied in the morning, be sure to use with an SPF of 30 or higher
    • For the first use, attach the enclosed dropper in the product package
    • Use within 2 months of opening, due to active ingredient protection
    • Store upright in refrigerator once opened
    • RESULTS:
    • In 4 weeks:
    • 16.26% improvement of pigmentation (visible melasma and blemishes)*
    • 32.89% improvement of triple-complexion skin tone (red skin tone)*
    • 32.36% effect of brightening (skin radiance)*
    • 16.36% improvement of elasticity (internal elasticity)*
    • 38.65% improvement of the pore (volume)*
    • 27.18% improvement of the pore (count)*
    • *Based on clinical trials of 20 subjects; Dermacosmetic Skin Science Laboratory Co., Ltd.

  • Shipping & Returns

    • This item qualifies for Free Shipping with minimum purchase! exclusions & details
    • Our Normal Gift Boxing is not available for this item.
    • California and Minnesota customers call 1-800-289-6229 for Free Shipping information.
    • For complete details, see our Shipping and Returns policies.

Ratings & Reviews

Here's what customers think
  • The serum is described as lightweight, hydrating, and absorbing quickly into the skin.
  • Many reviewers noted that it helped brighten their skin, fade dark spots and hyperpigmentation, and improve the overall appearance and texture of their skin.
  • However, a common complaint is the strong, unpleasant smell that many found off-putting, though some mentioned the smell dissipates quickly.
  • Some users also found the serum to be a bit sticky or tacky upon application.
  • A few sensitive-skinned customers reported experiencing irritation or breakouts from using the serum.
AI-generated summary from 3,660 customers reviews.
4.1/5

3,668 star ratings, 3,660 reviews

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On average, customers rate the Oil-absorbing/moisturizing of this item as Neutral.

On average, customers rate the Heavy/light of this item as Neutral.

On average, customers rate the Best for day/best for night of this item as Day or night.

489 customer images

3,660 reviewssorted by Newest

Randall H.
5 days ago
Incentivized review

Literally seeing brightening results in

Literally seeing brightening results in less than 1 week.

Customer review from cosrx

External reviewer
7 days ago
Incentivized review

Instantly brightening dull skin! Has

Instantly brightening dull skin! Has made the biggest difference. The strength does irritate my skin at first but gets used to it quickly. Must be refrigerated!

Customer review from cosrx

Jimena G.
8 days ago
Incentivized review

Great high quality, have seen

Great high quality, have seen a difference in a week.

Customer review from cosrx

Denise A.
12 days ago
Incentivized review

I love how this serum

I love how this serum softens my skin and makes it glow!

Customer review from cosrx

Krista S.
18 days ago
Incentivized review

I've been using the vitamin

I've been using the vitamin C serum for a few years and love it. My skin feels smooth and soft. It might even help keep wrinkles away. I'm in my mid-50s, and I like to think my skin doesn't show it. Whether that's thanks to this serum or not, I plan to continue using it.

Customer review from cosrx

Adam H.
22 days ago
Incentivized review

I've only been using the

I've only been using the product for a week but really love how it's making my skin feel and look. I can't wait to see the results after continuous usage. I love COSRX products!

Customer review from cosrx

Dipali S.
26 days ago
Incentivized review

The COSRX Vitamin C Serum

The COSRX Vitamin C Serum has been such a great addition to my skincare routine. The formula feels lightweight and absorbs quickly, but it still delivers that potent, active feel you want from a good vitamin C. It gives my skin an immediate glow and layers beautifully under moisturizer and sunscreen without feeling sticky. After a couple of weeks, I noticed my complexion looking brighter and more even, with a healthy radiance that makes my skin look well-rested. It also pairs really nicely with the rest of my routine and hasn’t caused irritation, which can sometimes happen with stronger vitamin C formulas. If you’re looking for a vitamin C that delivers visible brightness and glow while still feeling elegant on the skin, this one is definitely worth adding to your lineup.

Customer review from cosrx

Laura W.
27 days ago
Incentivized review

I love how well this

I love how well this product absorbs into my skin. My skin feels soft and supple after, which I haven't experienced with other more expensive brands of vitamin c serum. I'm also noticing more even complexion with consistent use. Very satisfied!

Customer review from cosrx