Name: The Vitamin C 23 Serum
Brand: COSRX
Rating: 4.47 (3098 reviews)

4.47

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88 Reviews

o블루베리o
Apr 3, 2025
Oily Skin
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Pros
It's the first time I've seen a vitamin C that doesn't oxidize!
Cons
Applying it alone can be irritating. However, when mixed with Hwahae or hyaluronic acid ampoules, it does not cause irritation!

블랙포레스트
Mar 29, 2025
Combination SkinSensitive Skin
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
The vitamin content is high and the volume is large, so I used it without any burden. The vitamin C serum has a slightly oily formulation.
Cons
The product has a vitamin-like scent, but it seems to be divisive in terms of people's preferences. My younger sibling says it smells like sesame oil. The oily formulation causes it to quickly slide down the face. You have to rub it in quickly when applying. And it has a sticky finish.

장재는못말려
Mar 15, 2025
Dry SkinSensitive Skinproduct.Atopy Skin
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
This has a vitamin oil-like feel. While the scent isn't particularly pleasant, I think it's better than artificially added fragrance. Since it's a vitamin, there is a bit of a tingling sensation on the skin, but it's not overly irritating. You'll need to follow up with a lotion or cream after application. It comes in a dropper bottle and the vitamins are well-protected in the brown glass container. This is a product I'd like to continue purchasing going forward.
Cons
The texture is more oily than a serum. When applied, it also has a slightly heavy feel. It does not have a refreshing application.
Tip
I've been purchasing the vitamin C powder product from Hwahae and mixing it into this serum to use. When I mix in that powder, it stings like crazy, haha. When I just use this product alone, it doesn't sting, but when I mix that in, it's very stinging!! However, the vitamin boost is definitely noticeable...

수부지려니
Mar 6, 2025
수부지Sensitive SkinAcne Skin
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
Working outdoors all day has significantly increased my concerns about freckles and blemishes. I've tried various whitening and blemish-reducing products, and using this product along with Hwahae's No. 5 Ampoule has been effective. Around the third week, I clearly noticed my freckles and blemishes fading, and I've continued using both products consistently since then.
Cons
The slightly oily texture and smell...along with the vitamin C characteristics that require refrigeration and prompt usage...it's inconvenient, but I can't stop using it because of the effects. ㅠㅠ

럭키★
Mar 5, 2025
Combination SkinSensitive Skin
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
First, it was good that it contained a high amount of Vitamin C and it does not become dry!
Cons
When my skin condition is not good, it really stings a lot. And it gets oily.
Tip
Once a week!

버블봉
Mar 4, 2025
Combination SkinAcne Skin
Review under verification
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
The product had a smooth and non-irritating application. When used consistently, it gives a brightening effect on the complexion.
Cons
There is a bit of an oily feel? The pajamas and pillows may have some residue, but it cleans up nicely after washing!

장식적인흰가슴산달753
Feb 28, 2025
Normal Skin
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
This is really good, the vitamin C ampoule. There's nothing better than this. The pigmentation really disappears well.
Cons
There is a bit of an oily feel to it, which is actually good for now, but it seems it won't be usable in the summer.

김춘배7
Feb 1, 2025
Oily SkinAcne Skin
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
The absorption rate was better compared to other vitamin serums and ampoules.
Cons
I'm not sure if it's because I kept it for a long time, but the color changed to brown too quickly, and it was quite oily and had a canned tuna smell, so it was not very good. The whitening effect was also somewhat minimal...

kangyh9659
Dec 29, 2024
Oily SkinSensitive SkinAcne Skin
Review under verification
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Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
The product glides on smoothly, perhaps due to the inclusion of hyaluronic acid.
Cons
There are oil components, so it may not be good for oily skin... And the color is too yellow. It would be nice if a fresher product arrived.

백설공주호소인
Dec 29, 2024
Combination SkinSensitive SkinAcne Skin
Review under verification
The content is currently being reviewed by the Hwahae operations team, and the verification will be completed by the next business day (excluding weekends and holidays) from the date the review was written.
Reviewed by The Hwahae Testers
This review was written by The Hwahae Testers who received the product for free and evaluated it with a sense of representing Hwahae. The review is completely unbiased and honest, with no guidelines or restrictions. Reviews by The Hwahae Testers undergo the same strict verification process as regular reviews, and if they don't meet our standards, revisions will be requested.
Pros
To be honest, I didn't use it much because of the smell, but since it's a highly concentrated vitamin, it will probably make me a bit paler, I guess.
Cons
It's too oily, has a canned tuna smell, and is too spicy.