Estheticians Darya Rzaca and Aneta Zuraw note that you can start seeing results after four weeks of using a good eyelash serum. Overall, those with short and brittle lashes can expect the hairs to become longer and stronger overall. It’s important to note that when you do start to see results to keep going. Hoff says, “You have to keep using these in order for the lashes to continue to grow.” Glowing customer review: “I noticed that the eyelashes that I do have stopped breaking off and falling o