COSRX

The Vitamin C 23 Serum

532 Reviews

• 무우상5

  Jun 24, 2025 (UTC)
  Combination 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.

  OK

  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.

  OK
  Pros

  There's nothing particularly special about it. I usually prefer lower concentrations, but I bought the 23 because it was on sale. Unfortunately, it didn't work well for my skin.

  Cons

  When applied, it feels sticky and doesn't absorb well. It oxidizes extremely quickly.

  Tip

  The product seems to have a rich texture that might not suit all skin types. For those with combination dehydrated skin or those who prefer products that absorb quickly, this might not be the best choice. It's always important to consider your skin type and preferences when trying new skincare products, even if they're on sale.

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• 반볼

  Jun 24, 2025 (UTC)
  Combination 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.

  OK

  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.

  OK
  Pros

  It's a bit sticky, but I have to admit it does show some results! Haha

  Cons

  It's quite tacky. Since it was my first time using it, I found it stinging. I have to reapply it frequently.

  Tip

  The product seems to have a somewhat sticky texture, which might be off-putting for some users. However, it appears to be effective despite this drawback. The stinging sensation reported by the user could indicate that the product might be too strong for sensitive skin types. The need for frequent reapplication suggests that its lasting power might not be ideal. It's important to patch test new products, especially if you have sensitive skin, to avoid potential irritation.

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• 사회적인빨간색

  Jun 20, 2025 (UTC)
  Oily 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.

  OK

  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.

  OK
  Pros

  The high vitamin content really makes a difference - my skin discoloration has noticeably faded and blemishes have improved significantly.

  Cons

  When applying a generous amount, the texture can feel quite sticky and takes a while to absorb, potentially leaving yellow stains on your pillow. However, once it's fully absorbed, it's not really an issue.

  Tip

  If you're heading to bed with a thick layer of serum and don't have time to let it fully dry, it's a good idea to dust on a non-comedogenic powder to prevent clogged pores while you sleep.

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• 아스팙

  Jun 15, 2025 (UTC)
  Oily 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.

  OK

  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.

  OK
  Pros

  I've been using this for about 5 months, and the results are impressive. I apply it before bed, and after about two months, I started noticing the effects. I use a moderate amount, so I expect two bottles to last me around 7 months.

  Cons

  There's a distinct oily scent that might be polarizing. It's somewhat reminiscent of the olive oil from a tuna can, but it becomes less noticeable after application. The product is a bit sticky and feels slippery during application. Some people have reported a tingling sensation, but those who regularly use products with cica ingredients might experience this less.

  Tip

  I keep it refrigerated while using it. Even if you don't see dramatic before-and-after differences, consistent use should help improve your complexion slightly.

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• 우오아오오왕

  Jun 6, 2025 (UTC)
  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.

  OK

  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.

  OK
  Pros

  The texture is a bit sticky, so keep that in mind. This ampoule has a strong vitamin scent that matches its potent formula. It might cause a slight tingling sensation, so if your skin is in poor condition or has any blemishes, it's best to use it when your skin is in good shape. The next day, your skin feels soft and looks brighter.

  Cons

  The slightly sticky texture wasn't my favorite, and there's a possibility of mild tingling. However, its effectiveness is undeniable.

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• 은ㄴ성

  Jun 3, 2025 (UTC)
  Dry 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.

  OK

  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.

  OK
  Pros

  If your skin responds well to vitamin products, this could be an absolute game-changer for you!

  Cons

  Unfortunately, it doesn't seem to agree with my skin. It feels way too sticky, and after about a month, it becomes completely unusable. I had to throw away an entire unopened bottle. What's worse, it even caused blemishes for me!

  Tip

  Everyone's skin is different, so what works for some may not work for others. It's always a good idea to patch test new products, especially if you have sensitive skin.

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• 헛둘티모대위

  May 31, 2025 (UTC)
  수부지Acne 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.

  OK

  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.

  OK
  Pros

  It definitely makes a noticeable difference in smoothing out skin texture and providing excellent brightening effects. The contrast between using it and not using it is quite apparent.

  Cons

  The downside is that after applying it with your hands, there's a lingering stickiness that can transfer to other objects you touch, which is a bit inconvenient.

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• 송강여치니

  May 19, 2025 (UTC)
  Combination SkinSensitive SkinAcne Skinproduct.Atopy 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.

  OK

  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.

  OK
  Pros

  My friend told me that the whitening product has an effect, so I'm using it! I'm currently charging my face with vitamins.

  Cons

  The fragrance is not my style, and the formula is more like water than a thicker consistency, which is disappointing. And if you apply too much, it becomes sticky.

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• 밍글17

  May 12, 2025 (UTC)
  Combination 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.

  OK

  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.

  OK
  Pros

  I've been using this for over a month now. I have combination skin that leans towards oily. You can really smell the vitamin content, and while products with just vitamins can be drying, the addition of hyaluronic acid seems to provide extra hydration. The next day after application, my makeup seems to apply better. I notice my skin texture and complexion appear more refined.

  Cons

  Perhaps due to the vitamin content, it feels like it might go rancid if not stored properly. It takes a while to absorb and is stickier than expected. If you wipe your face with just a toner the next morning, you'll notice a slight yellow residue. It seems it doesn't fully absorb into the skin.

  Tip

  I apply a vitamin serum and layer a hydrating moisturizer on top. This makes it feel less sticky and the added hydration seems to help stabilize my skin.

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• 꾸하나

  May 8, 2025 (UTC)
  Dry 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.

  OK

  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.

  OK
  Pros

  This is my first time trying a Vitamin C serum, and I can definitely feel the difference in my skin's condition when I use it versus when I don't. However, there are a few things you need to keep in mind when applying Vitamin C. If you follow these guidelines and use it consistently, you should see results. Personally, I think of it more as a daily care item rather than something that gives dramatic effects.

  Cons

  It tends to be a bit sticky, and you absolutely must apply a hydrating moisturizer after a short wait time.

  Tip

  Remember, Vitamin C products should be used up within 1-2 months and must be refrigerated. Also, wait 1-2 minutes for it to absorb completely.