I received a free sample of the lash boosting formula mascara at the beauty show. What they explained to me was that the mascara in itself doesn’t boost growth but it conditions the lashes and keeps them from breaking. I have been using this mascara for the past three weeks. It works just as well as my best mascaras, it doesn’t run at all, and it comes off easily. I do notice that it doesn’t make my lashes brittle as other mascaras do so hopefully it prevents them from breaking so much. Overall, it’s worth to purchase it since it costs about the same as most mascaras, around $17 on overstock.com.