Roll-On Essential Oils Shop Roll-On Oils: Instant Aromatherapy On-the-Go Essential oils are concentrated hydrophobic (having a tendency to repel or not to absorb water) liquids containing volatile chemical compounds extracted from different parts of plants (flowers, bark, leaves and/or fruit). Essential oils are integral to aromatherapy – a holistic healing treatment that uses natural plant extracts to promote mental and physical health and well-being. https://www.nationalnutrition.ca/aromatherapy-essential-oils/roll-on-essential-oils.html #RollOnEssentialOils