1. Introduction
During the last decade consumers have widely expressed their interest in natural products forcing the industry and the scientific community to search for alternative sources and raw materials. Cosmetology is a highly affected area by this phenomenon and the use of natural components from olive oil to jojoba extracts forms the latest trend. One of the most significant reasons for this change is the appearance of allergies and skin irritations due to synthetic preservatives (e.g. parabens), colourants, stabilizers etc. that have not yet been fully tested in the long run for their consequences on consumers’ health.