코스알엑스 퓨어 비타민 C 23% 세럼(비타민 E & 히알루론산 함유), 잔주름, 칙칙하고 고르지 못한 피부톤을 위한 브라이트닝 & 하이드레이팅 페이셜 세럼, 0.67fl.oz/20ml, 동물 실험 없음, 한국 스킨케어

so it doesn't irritate sensitive skin (like mine). Unfortunately, unscented vitamin c smells like hotdog water 💔

No

I've been using this serum for a couple of days now and I have seen slight changes in the appearance of hyperpigmentation on my face. The product in itself is lightweight and absorbs quickly leaving my face hydrated. I haven't experienced any irritation and skin breakout since I started using it. Overall it's an affordable serum for anyone looking to improve their skin's texture and moisture levels.

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.

The VitC is very high concentration and the formulation keeps it stable. That's hard to achieve typically at this high concentration. But because of the high percentage and packaging to maintain it in its non-oxidized form, the product most often leaks. I have it subscribed and received a leaked product twice. It's a hassle to go and return it and wait for the reorder especially since it's a routinely used product. And when it has leaked, the product for the most part will be fully oxidized or more yellowish than normal indicating a lesser shelf life. So overall good product but leakage during shipping is a concern.