Extraction Methods of Herbal Essential Oils

Essential oils are extracted from the glands, ducts or cells of herbaceous plants, as well as the tissues and sap of woody plants. However, even for the same plant, the composition of essential oils extracted from different parts of the plant will vary, as will their therapeutic effects and dangers. Essential oils of Chinese medicine are manufactured in fresh herbs by liquid cooling after continuous circulation of a completely inactive gas. Compared with the extraction methods of common essential oils such as distillation and pressing, the quality of medicinal essential oils is more refined, and the activity of the essential oils is maintained more perfectly, which is a better way to extract the authenticity and essence of the medicinal herbs.