Fennel (Foeniculum vulgare)



Updated 2 January 2024

Family

  • Apiaceae

Components

  • Essential oils (especially trans-anethole)
  • Phenolic acids: caffeic acid, etc.
  • Traces of coumarins
  • Nitrogenous substances, proteins
  • Fatty oils: petroselinic, oleic, linoleic acids
  • Mineral salts: silica, potash
  • Vitamin A
  • Flavonoids: few
  • Polysaccharides

Parts used

  • Seeds (fruit), roots

Properties

Fruits :

  • Eupeptic
  • Antispasmodic
  • Carminative
  • Stomachic
  • Laxative
  • Expectorant
  • Galactogenic
  • Hypotensive

Root:

  • Diuretic
  • Aperitive

The leaves are emmenagogue

Indications

Internal use:

External use:

Side effects

  • No known precautions at recommended therapeutic doses.

Contraindications

  • Not recommended for pregnant women due to oestrogen mimicking effects.
  • The essential oil is subject to the same marketing restrictions as anise EO due to the potential toxicity of anethole and the risk of convulsions. Not for use by young children or pregnant women.

Interactions

  • Not documented

Forms of use

Internal use:

  • As an infusion (seeds): 1 to 2 teaspoons of dried fruit to a cup, steep for 6-10 minutes. Drink 2 to 3 cups a day after meals for digestive problems.
  • Infusion (roots): 1 teaspoon per cup for its diuretic action.
  • Infusion for infant colic: 1 teaspoon of dried fruit in a cup of cold water. Bring to the boil, remove from the heat and leave to infuse for 5 minutes. Filter and drink small amounts several times a day.
  • As a decoction: soothes irritated eyes and eyelids.
  • As a tincture or liquid extract: 30 drops in a little water 3 times a day.
  • In syrup with honey: as an expectorant to clear bronchial mucus.
  • In powder form: mixed with milk for flu.

External use:

  • As a compress (concentrated infusion, leaves).
  • As a gargle: for sore throat.
  • In a steam bath (Fennel Hydrolate): eye problems, eye strain.