BT-019 · Apiaceae

Fennel

Foeniculum vulgare
Evidence: LimitedCaution

Marathon is named after a plain near Athens full of fennel; marathon is Greek for fennel.

Other names
Hinojo, rezene (Turkish)
Part used
Seeds, bulb
Region
Anatolia and the Mediterranean
Use
Healing, Food
Fennel (Foeniculum vulgare): umbels of yellow flowers
Photo: Dianakc · CC BY-SA 3.0 · Wikimedia Commons
In short

What is Fennel?

Fennel (Foeniculum vulgare) is a plant of the Apiaceae family. Traditions that use it: Anatolia and the Mediterranean. Part used: seeds, bulb.

What is Fennel used for?

Traditional use: The tea is given for colic in babies and to boost milk in nursing mothers. Scientific evidence: limited. The EMA recognises fennel seed for mild digestive complaints, gas and period pain.

Is Fennel safe?

Safety label: caution. Because it contains estragole, the EMA advises against long-term use in young children and pregnancy. People allergic to celery or carrot may react.

Traditional use

Anatolia

The tea is given for colic in babies and to boost milk in nursing mothers. In the Aegean, the bulb and stalks go into dishes.

In nature

Where it grows
Roadsides, fallow land and coasts in the Aegean and Mediterranean.
Harvest season
Leaves in spring, seeds August–September.
Local names
rezene, arapsaçı, raziyane, malatura

Mix-up risk

The same family includes deadly poison hemlock (Conium maculatum). Fennel has a clear aniseed smell; never pick umbrella-flowered plants that lack it.

Preparation

Seeds are lightly crushed and steeped.

What science says

The EMA recognises fennel seed for mild digestive complaints, gas and period pain. There are small studies on infant colic.

How strong is the evidence?

Claims often repeated online about Fennel, and what science says today.

ClaimEvidenceNote
Reduces gas and mild digestive complaintsTraditional onlyRecognised by the EMA as traditional.
Eases period painLimited evidenceEffect close to painkillers in small studies of low quality.
Helps infant colicLimited evidenceSmall studies exist; the EMA advises against use under 4 because of estragole.
Increases breast milkNo evidenceNo reliable evidence.

Common mistakes

  • Giving babies fennel tea regularly: the EMA advises against it because of estragole.
  • Overlooking the sugar in instant “baby tea” granules.
  • Thinking fennel and anise are the same plant.

Frequently asked

Does fennel tea cause or relieve gas?

It is traditionally used to relieve gas.

Can babies have fennel tea?

The European Medicines Agency does not recommend it under 4. Ask a paediatrician about colic.

Does fennel increase milk?

A common belief, but there is no reliable evidence.

Safety

Caution

Because it contains estragole, the EMA advises against long-term use in young children and pregnancy. People allergic to celery or carrot may react.

Drug interactions

Medicine or substanceWhy it matters
Some antibiotics (ciprofloxacin)Taken at the same time, may reduce absorption.
Hormone therapy and birth control pillsIts weak oestrogen-like effect could interact in theory.

This list is not complete. If you take regular medication, ask your pharmacist or doctor before trying Fennel.

Similar plants

Sources

  1. EMA monographFoeniculi amari fructus: European Medicines Agency herbal assessment
  2. ResearchFoeniculum vulgare: botanik, fitokimya, farmakoloji ve toksikoloji (derleme)
  3. BookBaytop T. Türkiye’de Bitkiler ile Tedavi: Geçmişte ve Bugün. 2. baskı. İstanbul: Nobel Tıp Kitabevleri; 1999.
  4. Botanical recordKew Plants of the World Online: Foeniculum vulgare
  5. Titles of research sources are summarised in Turkish on the Turkish page; links open the original English publications.

Written by Edanaz Tınmazlar · Last reviewed: · Türkçe