This is a myth of truly biblical proportions. So many people believe that frankincense oil is a proven treatment for cancer, that I receive messages every day asking me how it should be used for all kinds of malignancies. The fact is, there is no clinical research. There is not one single study published in a peer-reviewed journal, in which frankincense essential oil was successfully used to treat any kind of cancer. There is just one published anecdotal case report of a successful treatment for skin cancer.