The following text is the editorial comment in Medicinal & Aromatic Plants, Vol. 1 issue 1 2012. I have reproduced it in full as it expresses my own sentiments more eloquently and economically than I could do myself. The editor is Paul Schnitzler, who works at the Department of Infectious Diseases, University of Heidelberg Medical School, Germany.
“Plants produce primary and secondary metabolites, which have been exploited by humans for many different beneficial purposes. Many secondary plant metabolites, e.g. terpenes, terpenoids, alkaloids and phenolic compounds have been well characterized. Essential oils are considered the chemical weapons of plants, as their compounds may deter insects or protect plants against bacterial and fungal infections. They also act as plant pheromones to attract insects. In traditional medicine, lots of plant products have been widely used for the treatment of neurologic diseases, cancer, inflammation and infectious diseases and plants represent an abundant source of new bioactive secondary metabolites.
According to the Communicable Diseases Centre in the US, about one third of prescribed antibiotics were inappropriate thus stating an overuse and misuse of antibiotics. Essential oils are also highly active against multi-resistant Staphylococcus aureus (MRSA), one of the so-called hospital super bugs, as well as more common and well-known infections like herpes labialis. In addition to antibacterial and antiviral effects, essential oils have been shown to possess many useful pharmacological properties, often being more effective than conventional drugs and revealing fewer side effects.