Review title is It takes two weeks to see a result [SEP] I am on my second day of using this product. I have used other products - some work, some do nothing. I am hoping for the former on this. It has a very thin applicator brush so you can just line the upper part of your eyelashes and when dry, you can apply mascara. I haven't had any adverse reactions. I will know more as time goes on. It looks like my lashes are darker already, but that could be my wishful thinking.