Indigenous to the shores of the Mediterranean, fennel essential oil obtained through the steam distillation of crushed seeds of the fennel plant. The pale yellow liquid has a thin consistency and a sweet, almost peppery aroma. The oil is an effective stimulant for the nervous, digestive, and excretory system and is a known laxative to ease indigestion. When used in massages, fennel essential oil can nourish and restore the muscles when rubbed into areas that have been stressed or overworked.