Our beautiful Lash & Brow serum begins with Castor Oil... a rich and thick oil made from the Castor Bean Plant, known to help promote hair growth. We blend it together with argan oil, olive and jojoba to formulate a beautiful serum that helps grow stronger and thicker eyelashes that won't easily break. Sweep the applicator brush through your brows too, to help them grow. A little of this rich oil goes a long way!