Powerful Vitamin C works really well to me, I use it for weeks, very hydrated and doesn't irritates.
It does stingling a bit when applying, but this is not going to stop me using it, it has very nice texture and easy to apply, one or two weeks you will see radiance, it's part of daily routine.
I love this serum, I never feel so tightening brightening while using other VC but this, quickly changes my skin texture to eventoned, couldn't live without it.
This serum is really nice for sensitive skin, and works great!
I've used Kiehl's stuff since in high school, it always won my heart and this one as well, I need this to keep my skin stay young and prevent wrinkles in advance, and it does.
It really good at fading sun spots and helps to refine my large pores, love it!!
A period of time with this I feel like I am renewed, I notices clearing surface on some eara of my skin that a baby could have, so happy with this.