COSRXPure Vitamin C 13% Serum with Vitamin E & Hyaluronic Acid, Hydrating Facial Serum for Fine Lines, Uneven Skin Tone & Dull Skin, 0.67fl.oz/20ml, Korean Skin Care

I've been back and forth with skin care for years. From pricey brands to more affordable brands. My last purchase of vitamin c serum was from skinceuticals. Super expensive and although it was ok it certainly isn't worth the price. I use the snail mucin from cosrx and I really like it, so I decided to try the vitamin c 13 from cosrx. They also have a vitamin c 23, but I wanted to try the 13 first. Like many of the reviews mention it does have a "fishy" smell to it, but it doesn't last for long. I'm on the 5th day of using this and I can't believe it. I can see a difference. My skin is brighter and softer in just a few days. I've never with any other skin product have seen results so quickly. I do believe I've finally found a good vitamin c serum that I'm gonna stick with and like I mentioned this is the 13%. When this is gone, I'll order the 23%. I do recommend starting with the 13% to avoid any skin irritation and then move up to the 23%. I am a little bummed out because it took me a long time and alot of money before I was able to find cosrx, but now that I found it, I'll continue to use it. I highly recommend and shout out to cosrx for making awesome skin care products affordable. 🌟🌟🌟🌟🌟

Amazing quality skin care item for a very affordable price point. Brightens and clears skin from early signs of aging.

Better than I thought. I’m ok with the smell, not too bad. The consistency is watery. It’s gassy when opening but the color is ok, has not been oxidized. Satisfied.

I’d like you to meet officially my glow dealer. I put her on, and it’s like someone turned the brightness up on my face without making me look oily or fake — just pure, radiant, even skin.She’s lightweight, sinks in instantly, and doesn’t give me the dreaded sticky or stingy drama that so many vitamin C serums bring to the table. Within weeks, my dullness is GONE & my redness? Fading. My entire complexion? Smooth, even, and practically sparkling. I look like I’ve been sleeping eight hours and drinking green juice (spoiler: I haven’t).This isn’t just brightening — it’s transformative. My morning routine feels incomplete without her, and when I skip a day, I can tell. She’s will forever live in my mini fridge rent free.She’s the reason I’m glowing like I actually have my life together.

I like the consistency of this vitamin C serum. It's watery and soaks into the skin very quickly, doesn't leave alot of stickiness afterward like some others I've used. It has a slight unpleasant odor which doesn't linger but it may bother some users. It's very important to read the small user guide included in the box because this serum must be refrigerated after opening in order to maintain it's freshness and efficacy.

it’s smells like wet dog food. but it feels great on the skin, and it’s brightened my skin so far

Background: I’m not a skin care expert and am not a skin care professional. But I’m someone who recently got into skin care for myself. I have uneven skin tone and dull looking skin. In my 30s, brown skin, and I seldom use any makeup.About Vitamin C and this product:Vitamin C is great to even out skin tone and make it bright. This one is a very potent Vitamin C serum - it is 13% vitamin C. To put that into context, most starter vitamin C serums and creams are 10%. But this concentration suited me well and I saw results almost from Day 1. A little goes a long way, don’t need to apply too much. Within 2 weeks most of my dark patches were gone and my skin was glowing. After 1 month of use I even stopped using makeup altogether even while going out. In short it worked great for me.The catch:Do remember, this is acidic (Ascorbic acid). And it is pretty concentrated at 13%. If you have sensitive or thin skin, this should NOT be the first thing you should apply on cleansed face. Use a toner or anything which can repair skin barrier before using this serum. Otherwise it can cause extremely dry skin, irritation and redness. I use the Cera Ve hydrating toner. Also follow it up with a good moisturizer to prevent skin from drying. If you are going out in the sun then sunscreen is a must, otherwise this will do more harm than good. Don’t overdo it, applying it once a day and like a serum (few drops) should be enough. Look out for patches of redness and dried skin when using, it is usually means you are overdoing it and need to back off a little. Use a night moisturizer to calm the skin - that worked for me.

Have yet to use the product because was delivered damaged. The product box is stained brown and the serum bottle is basically empty.