COSRXThe Vitamin C 23 Serum

This serum turned out to be more useful and effective than others I have used. I am already buying a second bottle; I really like it and will definitely use it again.

This highly effective serum unifies the skin, nourishes it and helps with hyperpigmentation after acne. It must be kept in the refrigerator, so that after application it pleasantly cools the skin. It has a watery consistency with a yellow color. If the color darkens, I recommend not using the serum, as it has oxidized and its effects are nullified.

Its the second time I bought it very good for my skin smells a bit but i don't mind. Very easy to absorb.

I have been using this serum for 2 weeks, despite the not-so-good smell, which doesn't bother me, I can see the result. My face is smoothed. I use it in my morning routine after rice toner, I apply Vit. C and a skin cream with factor

Very good product. I have been using it for a month. My skin is soft and fresh. I don't mind the specific smell when using it, what is important is the effect that is visible with regular use.

A good serum with not too many ingredients, but effective. Lightens pigment spots and overall skin tone. Can be aggressive for beginners, and the smell is also a matter of taste.

The tuna smell is true, but it fades quickly, my skin absorbs it very pleasantly, I will definitely buy it again

I've been using it for 3 weeks now. I had a different serum with vitamin C before but this one works better for me. It absorbs well and doesn't clog my pores, I always use it in the morning after cleansing my face. It has a specific smell but you get used to it. I recommend it.

Very great rooms. Eros, powerful. Does not cause irritation. It soaks in, it doesn't have a sticky effect. The smell is quite unpleasant, but bearable.

Very, very unpleasant smell, so much so that it discourages me from putting this serum on my face. If anyone is interested, I'll move on.