Ifa trains the comprehensive theory and application of aromatherapy, involving some basic knowledge such as chemistry, anatomy, physiology, essential oil and massage. In fact, almost all distance classes are self-taught, and it is difficult to find teaching materials without reporting to the class market. How can I take the exam? You can't apply for membership without training time like other associations. But if you don't pursue a certificate, the books available on the market are enough to study professionally.