Fennel Health Dictionary

Action: a gentle warming agent for delicate stomachs; carminative, aromatic, antispasmodic (children), digestive, orexigenic, rubefacient, diuretic (soothing), galactagogue, stimulant (mild), anti-inflammatory in polyarthritis, anticoagulant (Vitamin K antagonist). Antimicrobial. Expectorant. Oestrogen-effect – Aberdeen University.

Uses: To disperse windy colic in infants; griping; to arouse appetite, sweeten a sour stomach, soothe an irritable bowel. To increase milk in nursing mothers. Obesity (traditional tea). Wrinkle smoother (tea). Old Chinese remedy for cholera. Externally, an eyewash for red-eye and blepharitis.

Preparations: As necessary.

Tea. Fresh or dried leaves: 3-4 teaspoons to teapot; add boiling water. Dose: adult; half-1 cup; infants, 2- 3 teaspoons.

Tea. Crushed seeds: quarter to half a teaspoon to each cup boiling water; infuse 15 minutes. Quarter to half a cup (infants, 2-3 teaspoons).

Liquid Extract BMP (1983) 1:1 in 70 per cent alcohol. Dose: 0.8 to 2ml.

Fennel water (distilled). 5-15 drops.

Powder. 300mg capsules; 2 capsules before meals thrice daily.

Lotion. Half a teaspoon crushed seeds in cold water. Infuse 1 hour. Half fill eyebath and use as a douche. Diet. Young shoots and root as a cooked vegetable. Seeds sprinkled on salads.

Note: Fennel seeds were discovered among personal chattels of Egyptian rulers salvaged from among the tombs.

Side-effects: slight return of periods in menopausal women. 

Habitat: Chalk cliffs and downs.

Action: Carminative, stomachic, stimulant, diaphoretic.

FAMILY: Apiaceae (Umbelliferae)

SYNONYMS: F. officinale, F. capillaceum, Anethum foeniculum, fenkel.

GENERAL DESCRIPTION: Biennial or perennial herb up to 2 metres high, with feathery leaves and golden yellow flowers. There are two main varieties of fennel: bitter or common Fennel, slightly taller with less divided leaves occurring in a cultivated or wild form and sweet fennel (also known as Roman, garden or French fennel) which is always cultivated.

DISTRIBUTION: Bitter fennel is native to the Mediterranean region, found growing wild in France, Spain, Portugal and North Africa (they produce the ‘weed’oil). It is cultivated extensively worldwide, the main oil producers being Hungary, Bulgaria, Germany, France, Italy and India.

Sweet fennel is thought to have originated on the island of Malta, having been introduced by monks or crusaders thousands of years ago. It is now grown principally in France, Italy and Greece.

OTHER SPECIES: Bitter fennel (F. vulgare var. amara) and sweet fennel (F. vulgare var. dulce) are both closely related to the Florence fennel (F. azoricum), a smaller plant with a large cylindrical fleshy root which can be eaten as a vegetable. There are also many other cultivated varieties such as the German or Saxon fennel, the Russian, Indian and Japanese fennel, all of which produce slightly different oils.

HERBAL/FOLK TRADITION: A herb of ancient medical repute, believed to convey longevity, courage and strength. It was also used to ward off evil spirits, strengthen the eyesight and to neutralize poisons. In eastern and western herbalism it is considered good for obstructions of the liver, spleen and gall bladder and for digestive complaints such as colic, indigestion, nausea and flatulence (an ingredient of children’s ‘gripe water’).

It has traditionally been used for obesity, which may be due to a type of oestrogenic action, which also increases the milk of nursing mothers. Still current in the British Herbal Pharmacopoeia, used locally for conjunctivitis, blepharitis and pharyngitis.

ACTIONS: Aperitif, anti-inflammatory, antimicrobial, antiseptic, antispasmodic, carminative, depurative, diuretic, emmenagogue, expectorant, galactagogue, laxative, orexigenic, stimulant (circulatory), splenic, stomachic, tonic, vermifuge.

EXTRACTION: Essential oil by steam distillation. 1. Sweet fennel oil is obtained from crushed seeds, and 2. bitter fennel oil from crushed seeds or the whole herb (the wild ‘weed’).

CHARACTERISTICS: 1. A colourless to pale yellow liquid with a very sweet, anise-like, slightly earthy-peppery scent. It blends well with geranium, lavender, rose and sandalwood. 2. The seed oil is a pale yellow liquid with a sharp, warm camphoraceous odour; the ‘weed’ oil is pale orange-brown with a sharp, peppery-camphoraceous odour.

PRINCIPAL CONSTITUENTS: Anethole (50–60 per cent), limonene, phellandrene, pinene, anisic acid, anisic aldehyde, camphene, limonene, among others. In addition, bitter fennel oil contains 18–22 per cent fenchone, whereas the sweet fennel oil contains little or none.

SAFETY DATA: Non-irritant, relatively non-toxic, narcotic in large doses; bitter fennel may cause sensitization in some individuals. Sweet fennel oil is preferred in aromatherapy and perfumery work, since it does not contain the harsh ‘fenchone’ note, and because it is non-sensitizing. Bitter fennel oil should not be used on the skin at all, although it is considered superior medicinally. Neither oil should be used by epileptics or during pregnancy. Use in moderation.

AROMATHERAPY/HOME: USE Bitter fennel – none.

Sweet fennel:

Skin Care: Bruises, dull, oily, mature complexions, pyorrhoea.

Circulation Muscles And Joints: Cellulitis, obesity, oedema, rheumatism.

Respiratory System: Asthma, bronchitis.

Digestive System: Anorexia, colic, constipation, dyspepsia, flatulence, hiccough, nausea.

Genito-Urinary System: Amenorrhoea, insufficient milk (in nursing mothers), menopausal problems.

OTHER USES: In pharmaceutical products it is known as ‘codex’ fennel oil, used in cough drops, lozenges, etc; also used in carminative and laxative preparations. Extensively used as a flavour ingredient in all major food categories, in soft drinks and especially in alcoholic drinks such as brandy and liqueurs. Fennel oil (mainly sweet) is used in soaps, toiletries and perfumes. It also provides a good masking agent for industrial products, room sprays, insecticides, etc.