Just like wearing fake lashes your natural lash cycle is about three months, so they fall out and grow back all the time ( in average, we shed 1-4 lashes per day ). The serum gives your lashes a boost when they're in the growing stage phase of the growth cycle. Your eyelashes will go back to its original look after a few weeks or months. If you would like to keep the result you have accomplished, you can reduce the usage to 4-5 times per week.