As a general rule, the lighter the oil is, the purer it tends to be. You can also purchase Jamaican black castor oil, which is processed differently (it’s actually roasted) and much darker in color. Unlike traditional castor oil, the darker the Jamaican black castor oil is, the better. Castor oil is one of those traditional remedies that seems to do it all, from hair care and natural beaut to acne to supporting the immune system. There isn’t a lot of research on its exact mechanisms of action, but hopefully in the coming years we’ll learn a lot more about exactly how and why it works so well. For now, make sure you’re using a high-quality product and talking to your doctor about your supplement use and the natural remedies you’re incorporating into your life.