**9. Conclusions**

Essential oils have gained an increased attention in the last decades, being used as flavors, fragrances, medicines or in aromatherapy. Although generally considered as "natural and safe," some essential oils could cause significant adverse effects like skin sensitization and contact dermatitis, neurological toxicity or endocrine dysregulations.

An increased awareness of healthcare professionals and general public concerning the safety profile of essential oils is needed in order to correctly exploit their diverse biological effects.
