Several outlets have reported on the effectiveness of various eyelash growth serums, with some testers experiencing significant lash growth in a short period of time. The number of serums tested and recommended varies across reports, with some outlets suggesting a specific few and others listing up to 12 options. It appears that some eyelash growth serums may be effective in promoting longer, fuller lashes, although the most effective ones and the extent of their effectiveness is not universally agreed upon.