Eyelash serum is now becoming more and more popular as it allows the eyelashes to grow thicker, fuller, longer and darker without the need for false -eyelashes or mascara. It works by allowing the eyelashes to continue growing, making them longer, thicker and darker as mentioned above. Normally they would fall out and grow back slowly, Once you stop using the treatment your eyelashes will go back to there normal size and appearance. This is a prescription-only medication, therefore a face to face consultation is needed to access suitability. 3 month supply given with full effects after 16 weeks, however, may notice changes before this.