Spice oils are concentrated volatile liquids that are used across many industries, such as the cosmetics industry, pharmaceuticals, and even the medical industry. To harness spices, seeds, leaves, or other parts of plants are most commonly used. Spice oils can add flavor to foods or beverages. There are many spice oils to choose from, such as Aniseed oil, Ajowain, and many other types. These spices oils are often extracted via steam distillation.