Review (5/5): Use every single night for best results. It works
I've heard of eyelash growth serums but wasn't sure they would really work. I purchased few less expansive serums on Amazon and did not like them. I haven't got any results. I'm using COS Naturals vitamin c serum and noticed that they have eyelash growth serum too. After using this serum every single night I can really see improvements. My lashes are much longer and seems thicker as well. I strongly recommend trying this product! It really works