Essential oils are extracted from various parts of plants, including flowers, leaves, bark, and roots, and each oil has unique therapeutic properties.

Aromatherapy can be administered in several ways, including inhalation, topical application, and sometimes ingestion (under the guidance of a qualified professional). Inhalation, the most common method, involves diffusing essential oils into the air or inhaling them directly. This method allows the aromatic molecules to interact with the olfactory system, which can influence brain function and mood. Topical application involves diluting essential oils with carrier oils and massaging them into the skin, where they can be absorbed into the bloodstream and provide localised or systemic effects.