Essential oils (EOs), also known as volatile oils, are concentrated natural plant products which contain volatile aroma compounds. Most EOs are derived by steam distillation, a tradition which can be traced back as many as 5000 years. They possess unique properties which result in various possibilities for application, also in modern medical contexts. Areas for medical aromatherapy include respiratory diseases, pain management or stress alleviation, amongst many others. Different modes of application exist: The rich ingredients can be absorbed by the body by anointment, gentle massage, inhalation, or oral intake of capsules. Also the risks of EO application in medical contexts should be considered, such as rare allergic reactions, overdosing, poor substance quality or overestimation of the effectiveness.
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