Essential oils are the natural plant extracts that give plants their vitality and health and help fend off disease and insect attack. These oils are extracted from various parts of the plants (leaves, flowers, fruits, seeds wood or roots) by either hydrodistillation or cold pressing. Most essential oils are highly aromatic due to the volatile nature of their component parts. Not all plants and species contain essential oils and some plants contain more than one. If this is the case, the oils from that one plant will contain common properties as well as some individual properties. Each plant has unique characteristics and its own molecular make up giving the different aromas of each essential oil. The plants are carefully harvested and the oil is extracted and nothing else is added to it.