EO-16 - Fennel Essential Oil - Sold in 1x unit/s per outer -Size: 0x0 (cm) Fennel essential oil is extracted from the plant Foeniculum vulgare var. dulce, which is sweet fennel, also known as Roman fennel. It is extracted from crushed seeds by steam distillation. Oil, like seeds, is good for digestion, as well as a host of other ailments. It is used in aromatherapy to treat oily skin, wrinkles and obesity. It is said to increase courage, resolve and strength.