I am really loving this serum. I have very sensitive skin and usually cannot tolerate vitamin C products OR essential oils, but my skin loves this. I appreciate that cocokind discloses the percentage of essential oils in their formulas. This one is very small, so I'm sure that's why my skin is doing so well with it. Makes my skin feel lovely and adds some additional moisture beneath my cream. My skin is also looking brighter. My husband commented recently that my skin looked like porcelain! For the win!