When I was younger, I used to use lash repair and didn't find a difference using it or not. Lately I have been noticing my lashes keep dropping when I remove my mascara and I am worried that they will thin out. I went back to Shu Uemera but couldnt find the lash repair anymore. It seems all they have is the lash builder, so out of desperation I bought it. I use it religiously every day, either morning or night, and definitely when I use mascara. I did see an improvement -- a real obvious one. My lashes stopped dropping! I'm not sure if they have grown thicker or longer, but I'm just glad to maintain whatever lashes I have left.