COSRX Pure Vitamin C 23% Serum with Vitamin E & Hyaluronic Acid, Hydrating Facial Serum for Fine Lines, Uneven Skin Tone & Dull Skin, 0.7oz/20g, Korean Skin Care

I’ve only used this product for a few days, but I can already tell a difference, which is crazy. As soon as I put it on, it gave me an instant glow—not oily, greasy mess kind of glow, but the healthy, plump kind of glow. As someone who had beautiful skin during pregnancy, but is now struggling with uneven and dull skin tone postpartum, this made me extremely happy. Anyway, here are my initial thoughts: Formulation: •this contains a high ascorbic acid percentage. I’ve never been sensitive to ascorbic acid, so my skin does well with the high concentration. However, if you have more sensitive skin, consider starting with their other vitamin c serum that has a lower percentage of vitamin c. •there is no ferulic acid present, which is generally used to stabilize ascorbic acid. Without this, I’m afraid the product won’t last terribly long without oxidizing, so keep this in mind. The instructions do say to refrigerate after opening, which may help slow down oxidation. Texture: The texture of this serum reminds me of a bi-fácil product where there is an oil layer and water layer that need a little shake to incorporate. Don’t let the oiliness scare you though, it does sink in to the skin well and doesn’t feel heavy on the skin. I haven’t had any issues with pilling when I’ve applied other products and makeup on top. Smell: As many reviewers have mentioned, it does have a particular smell to it. To me, it reminds me of tuna, which is quite unpleasant. However, it does dissipitate quickly. I just hold my breath while I apply it to my face XD I don't smell it at all throughout the day.

This serum works really well. It also is affordable . The only complaint I have is that it smells terrible. Thank goodness the smell dissipates almost immediately. It does the job though and it's makes my skin brighter.

I've been a huge fan of Cosrx products. I originally had used the lower strength of vitamin c and upgraded to this one a few months back. I feel that it does work in terms of discoloration, but for some reason this one makes me break out more than other vitamin c products I've used. I'm going to finish up what I have left of this bottle but I think I'll go back to the lower strength. My only complaint with the Cosrx vitamin c is how small the bottles are. It could be because vitamin c doesn't last long in terms of potency once opened, but it's a bit pricey for such a small bottle. You definitely have to keep it in the fridge and the smell is strange and not very pleasant but goes away shortly after application. I have not noticed any stinging or irritation from this higher strength vitamin c, but like I said, I have noticed acne break outs happening a bit more than before. My recommendation...give it a shot if you've already used the lower strength and feel you need more potency, but beware of potential break outs.

First time with this brand, but using Vit C serum for years. So far one of my favorites in the range of price. Smells uncomfortable fishy but that is the Vit C normal smell, after some seconds over the skin the smell is gone, and personally prefer this than any extra essence. The oil is pretty thin and absorbs immediately. Haven't had any reactions but I have quite of time with this VitC concentration. I like how my skin looks, give me a glossy renewed look every morning. Any result with dark spots or fine lines, but I realized that is normal aging and nothing to do with it lol, anyway my skin looks healthy and younger for my age. Totally happy with this brand in my second week of use. Update: one month of use and still love it!

So I have purchased 3 bottles from the vendor. First bottle was like the one I previously brought from Ulta. Light yellow with a smell. The second bottle came clear, no smell and felt like nothing at all. so I sent it back. Whole foods never credited the return smh but thats a story for another day. I exchanged it with the seller for for another bottle. The third bottle came and again it has to be WATER. No smell at all, clear CLEAR, and feels like NOTHING. I assumed maybe it just hasn't oxidized being as though Im new to this product but then i went to ulta to get another one and the lady there said yeah they sold you water. Product is trash from this seller.

First, let me address the smell. I actually lost my taste and smell in 2020 and never fully got it back, so I had no clue this even had such a foul odor. I happened to stumble across the reviews, so I am quite amused simply because I was thinking my cat was wanting to spend quality “mommy and me” time every day while I was at the sink. However, now I am thinking it’s because she thought she was getting tuna 😂 JK, she likes to open my drawers and get hair ties in the bathroom, so I know she genuinely does want me for something. Now, regarding the oil: I love CosRx products, get regular skincare treatments (facials, chemical peels, etc.), follow some dermatologists and other non MD influencers on social media and all that fun stuff. In other words, skincare is important to me, so I don’t choose products that I put on my face willy nilly. I am about to order my second bottle, because I love this oil- I only use it a few times per week, but even then, it agreed with my skin, it is helping with my overall uneven skin pigmentation (it’s a slow process, so don’t expect overnight results), and it is more affordable than other brands out there.

ANOTHER UPDATED POST: bought my second bottle. Still smells awful, but I was excited given that the first bottle helped my skin. The first time, the box did not have any ingredients, and I could not find the information online. I specifically did not want to use product with tocopherol. Well, this time, the box did have ingredients, and I am delighted to see that the vitamin e is sourced tocotrinels, but my excitement was short lived as I saw tocopherol was on the list as well (see photo). I will still use this since I opened the bottle, but I won’t be buying again. From four stars to three. UPDATED POST: This still smells awful, but I must be getting used to the smell, or ignoring the smell because the product has made my skin smoother and more radiant. I just finished my first bottle and contemplating if I want to buy another. Bumping this product from two stars to four stars. ORIGINAL POST: This is the worst smelling vitamin C serum ever. I dont want one that is strong in fragrance, but this literally smells like gas I feel like I am getting drunk while smelling the scent when I use it on my face. This is awful awful awful. I can’t get past the smell to see the results. The smell does not disappear, despite what other reviewers claim. I can still smell the serum an hour after initial use.

Love love love