This is a pure essential oil, Manufactures by by steam distillation. This Essential oil can be used for multi purpose reasons. like Aromatheraphy , Cassia oil is known to boost the immune system — helping the entire body run properly. It maintains a healthy and functioning digestive system and improves blood circulation. Cassia oil is also an antidepressant, and it has been used for years to build courage and a sense of self-worth.