I bought this hoping that it would be more gentle than Skinceuticals CE Ferulic. Unfortunately, the Cellex-C was MORE irritating. My skin stung every time I applied Cellex-C. Also, the formula is as thin as water. I had to apply it with a cotton ball. I will try to use this on my neck and arms just because I don't like the hassle of returning things.
I used this when I started the product line, and it is great for sensitive skin~~Recommended