I'm using it now for about a month, not really sure yet however i think it did help my eyebrows fill in somewhat. It takes a while for lashes to grow so i'm encouraged.
I use it on my lashes and brows. My lashes are already long but thinning and were falling out easily while cleansing my face or removing mascara but that has improved dramatically and the bare spots in my brows are slowly starting to fill in.