Castor oil is one of the best kept secrets in the world of natural beauty.  Taken from the bean of the Castor plant, this oil is rich in ricinoleic acid (omega-9 fatty acid), which exerts powerful therapeutic effects. It will help your eyelashes to grow thick and long, and can keep them from breaking. It can also help you grow new eyebrow hair in bare areas that might have been over-tweezed. And it’s super cheap! Yes, it really is a wonder oil!