COSRX Vitamin C 23 Serum 20ml | Best K-Beauty Brightening Serum for Dark Spots

I have very sensitive skin, but this serum works just fine for me. I have only started for a week so too early to tell if it's effective.

Good

Buen producto, no tengo nada malo que decir…pero creo que hay mejores opciones en el mercado.

Clearly been tampered with. Immediately taking out the box the bottle felt light and I shook it around to see if anything was even inside. It felt like nothing was in there, so I poured it in a measured beaker glass to verify if it matched the correct amount of ounces and sure enough it’s been emptied. Be careful ordering this because the bottle is black so there is no way to verify if anything is inside without pouring it out.EDIT: upon further review I think the package has been leaking at first I thought that was the design on the box but it’s actually the product that has been spilled

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.

Yes, it is moisturizing. It is even better than paper masks. But it has a scent like food (?), that is a bit strange, and the serum is so yellow, every morning I wipe my face with cotton pad with toner, the pad became yellow….. so I guess it makes your skin more yellow too?

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. 🌟🌟🌟🌟🌟

This vitamin C serum has made my face smooth bright and moisturized. The small bumps on my face have slowly gone away. I like the way it makes my face feel moisturized throughout the day. Some people say it feels oily, and it does feel like an oil when you first apply it but then it dries to a natural finish with a slight tacky moisture film, but not at all oily. Some might feel it is oily because they apply too much. I like the way it dries down personally. Feels like the way a gel cream might feel when it absorbs. The smell is not great, but not horrible because it disappears once it dries. To me it smells like copper and burnt orange peels. I would buy this again because I like the results.