A 100% pure essential oil is not made with any synthetic chemicals. The term “essential oil” means that this oil is the very essence of the plant it was distilled from – it is the plant in its purest form, and made from nothing else. Essential oils are used in a wide variety of aromatherapy practices. An herb of the new world, Evening Primrose has long been valued for its healing properties, which border on the miraculous. It is a lunar herb well known to ally women’s conditions It opens its flowers and releases its scent at twilight.