Don’t Use Oregano Oil Again Until You Learn This Oregano oil can be powerful, but it’s also very strong…sometimes too harsh on sensitive organs. The key is making sure it’s oil of oregano and not oregano essential oil, which should never be taken internally. Even with clean oil of oregano, it’s not meant to be taken daily long-term. Use it as a short-term tool for specific issues and not as your everyday support. When used wisely, it can be helpful. However, fresh oregano can be used daily long-