The ingredients are good, but I can't bear how it makes the skin sticky.

This serum smells like 10 cans of why and how dare you, but if you can get past the smell it’s so hydrating and really helps the appearance of your dark marks. Definitely worth it!

Most of the time when I'm choosing a vitamin C serum I actually prefer something with a lower strength of vitamin C in it; my skin tends to be a little reactive to higher concentrations as a general rule. That being said, despite the fact that this is a 23% vitamin C I haven't had any trouble with it thus far. It does have a little bit of a scent that some people may not enjoy but that's not at all atypical of vitamin C formulas and I don't really mind it. For anyone wanting to incorporate a brightening serum into their routine, I'd recommend giving this one a shot.

The Cosrx Vitamin C 23 Serum is a potent addition to any skincare routine. Its high concentration of Vitamin C helps brighten and even out the skin tone, promoting a radiant complexion. The lightweight formula absorbs quickly, making it suitable for daily use.

This lightweight vitamin C serum has a viscous like texture that absorbs instantly into the skin. It has vitamin E and hyaluronic acid as well to moisturize and hydrate and is gentle on sensitive skin. Just make sure to store this one in the fridge!

really good vita c serum high potency and intense i like it so far

I really like that the packaging had the dropper on another bag, as well as the instructions in order to keep a good consistency of the product!

I received COSRX Pure Vitamin C Serumit as a gift for my honest review. It is lightweight, quickly absorbed into the skin, and leaves the skin smooth. My skin improves with this product and I look better than before. I will continue to use it for good results.

Looking for something to help lighten up those acne scars or just something to even your skin tone? This is it! It also has hyaluronic acid which also helps with hydration. This does need to be refrigerated after opening. Be careful when opening and do not shake too hard due to the natural gas made by vitamin C.

The vitamin C 23 brightens the skin and helps with skin dark spots. This vitamin C has an oily silky consistency which I love it feels really great on the skin. It has no scent and it doesn't irritate the skin at all but it does leave a sticky feeling after it's dries but after you layer another skin Care product it goes away. So for me this one is best to use after a toner and before Serums.

I still didn’t see any difference but I still believe that it will make a difference

Love this stuff! will buy again!

But overall a good vitamin c non sticky fast absorbing vitamin c serum non irritating

I don’t see a very big difference but not bad

Vitamin c helps with blemishes and skin care even out darrker spots

My favorite vitamin C serum currently, very affordable and great quality

My favorite vitamin C serum currently, very affordable and great quality

The best vitamin c serum and it's hydreting

I am have sensitive skin but still it okay to use love it

This is my OG vitamin C, great formula, non irritating

First of all, it works. I notice a difference in my skin when I used it but I'm only giving 3 stars because it has a few points that they can work on. 1. The smell - it smells really bad like a rotten egg and it took me a long time to use up the bottle because I did not enjoy using it due to the smell. 2. Sticky - it's very sticky on the face. I dab blotting paper to get rid of excess oil, but it still looks oily after wearing it. 3. It turned yellow very easily even if I placed it in the fridge after opening.

good products, works as advertised , but sticky and have to store it in low temperature

Great product love it a lot great

Haven't tried it yet but seems promising

I love this products it gave me alot of moisture and non sticky

Very good product highly recommended

No sticking,feel smoother.it hydrate very well.recommend.

A highly concentrated serum that fades acne scars and brightens the complexion to revitalize dull and dry skin. This serum has a light texture which is absorbed quickly into my skin and didn’t feel sticky. It has a yellow color and a mild rusty scent. This works well in lightening my blemishes and acne marks and gives me an instant glow after using it.

First week of using it my skin was too sensitive against it then things went good

[COSRX] *TIMEDEAL* The Vitamin C 23 serum 20ml Your redness will be gone I like it