How does GFOUK LashElixir Rapid Growth Strengthening Eyelash Serum Work? Our innovative serum isdesigned to promote rapid growth and enhance the resilience of your lashes through the power of an exquisite formula. At the heart of this formula lie The nurturing properties of castor oil, together with biotin, a dynamic duo that not only accelerates the growth of your lashes but also fortifies them, preventing breakage and brittleness. What Makes GFOUK LashElixir Rapid Growth Strengthening Eyelash Serum The Great Choice? How To Use: