Stacy Lash Serum - this eyelash treatment enhancing lashes making them 50% longer. It makes your natural lashes thicker, longer, and nourished in 4 weeks! This lash serum is hormone-free and contains biotin and peptides which makes it an amazing eyelashes growth stimulator. Designed without oils, it doesn't stick or leave oil. Add thickness and growth to natural lashes without any harm to eyelash extensions. The best lash growth serum for women who combine enhancing makeup with extensions.