This works really well and is very low cost compared to other brightening/whitening serums and essences.  I love that the bottle has a pump so you get the perfect amount each time.  It took about two weeks for me to see a difference, but man, now my skin is really glowing and bright.  A word of warning: you really only need one pump for your face because as the directions say, you should use it sparingly as it can cause congested skin if too much is used.  One pump = Perfect!

This brand is literally my husband since this summer, I've been using almost every products from cosrx for now and still cant get over their low prices and high quality . I do recommend this brand to everyone who wanna dive into kbeauty , simple ingredient list , and you can see the change after 2-3 weeks of using them. I'll continue buying products from cosrx . (sometimes I prefer cosrx over my expensive products) Love you my husband!

I haven't tried many essences, but I really like this one. It has really helped me to lighten my dark marks, and keep my skin bouncy and radiant. It is also nice and soothing. I love to put it on after washing my face from sweat from exercise. 

I love this! Makes all pigment sport disappear! I will definitely rebuy!

After a few uses my faces is definitely brighter