Works on dark hair without leaving residue or the dreaded white/grey gunk in the roots. There's a video on how to use dry shampoo properly...WATCH IT! It seems like a "duh" kind of thing but seriously, it helped to know a better way to do it. I spray, let it set, and then tousle my hair upside down. Most of the time I can get an extra two days out of my hair with this stuff. With my oily hair, this is a lifesaver. I have tried all the other in store brands and have always gone back to this one. It's THAT good.