Fennel For Increasing Milk Supply: Does It Really Work

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Several food items are known to increase breast milk supply, and fennel is one of them. Mothers have long been using fennel for increasing milk supply. A good milk supply is essential for the growth of the baby.

According to researchers, fennel has galactagogue (a food that increases milk supply) properties that promote lactation. However, you must know the facts and details about fennel before trying it. Read this post to learn about the effects of fennel on milk supply, how to consume these seeds, and the precautions you must take.

What Are Fennel Seeds?

Fennel seed is sourced from the Foeniculum vulgare plant and is a favorite herb used in several cuisines throughout the world. In India, it is called saunf, and is often consumed raw after meals for healthy digestion. Powdered fennel is used as food flavoring. Fennel oil is added to tea for flavor, or fennels seeds are directly infused in water with other herbs to make herbal tea. Let’s see if fennel helps in breastmilk supply.

Does Fennel Increase Milk Supply?

Yes, fennel seeds can increase the quantity of breastmilk but it is anecdotal, and lacks scientific evidence in humans. However, researchers acknowledge galactagogue properties of fennel as studies have found a significant increase in milk production among other mammals (1). Read on to know how fennel works in humans.

According to the book Bhavaprakashaof Bhavamishra Commentary by Dr. Bulusu Sitaram, ayurveda recognizes fennel, along with dill seeds, as a galactagogue. They are also known to relieve pain in the female genital organs and the spasmodic pain of abdominal organs, and act as appetizers and taste promoters.

How Does Fennel Increase Breastmilk?

Fennel contains a compound called anethole, which is chemically similar to the brain’s neurotransmitter dopamine. Dopamine binds to prolactin, the hormone that stimulates the production of breastmilk and changes its chemical composition, making it ineffective in milk production.

Since anethole is identical, it competes with dopamine and binds with prolactin first, but preserves its milk stimulation properties. Therefore, there is a boost in the milk production due to drop in ineffective prolactin-dopamine compound (2). You might want to know the quantity of fennel to consume to make it effective.

How Much Fennel Helps Increase The Milk Supply?

After a careful analysis of about 32 studies on galactagogues, researchers have found the results ambiguous. The scientists concluded that the use of fennel and other galactagogues is inconclusive and subject to more research (3). So, there is no means of telling how much fennel can increase breastmilk and by what quantity (4).

How To Consume Fennel When Breastfeeding?

You can eat fennel in several ways. Here are some of the options:

  • If you consume a traditional Indian mouth freshener after meals, then you are quite probably having raw fennel seeds already. Since mouth fresheners are consumed in small quantities, you will ingest only a small amount of fennel this way.
  • Fennel tea is a decoction of fennel seeds, leaves, and even the root bulb boiled together in water. The tea is naturally free of caffeine and helps in digestion.
  • Fennel oil is made from crushing the fennel seeds to extract anethole-rich oil from it. Fennel essential oil can be added to regular tea or a glass of warm water. Do note that just like any other essential oil, fennel oil contains compounds in their concentrated quantities – beyond what you consume through raw seeds or tea. Therefore, stick to the suggested quantity of consumption mentioned on the bottle or consult a doctor/lactation expert before using it.
  • Fennel extract tablets and capsules contain crushed fennel seeds encapsulated in gelatin. They are often consumed after meals to help ease after-meal bloating. But, just as fennel oil, the contents in capsules and tablets are in a concentrated form.
  • Fennel belongs to the same botanical family as carrot. Therefore, fennel’s root leaves can be eaten.
  • Fennel powder has been used in food preparation for centuries. Powdered fennel is available in supermarkets, and you can add it to any dish for flavor while also getting the natural benefits of fennel.

Fennel preparations like oil and capsules may contain preservatives that could harm the baby, and it is best to avoid them or consult a doctor before using them.

Are There Any Side Effects Of Fennel When Breastfeeding?

No, there are no side effects of fennel consumption either on the mother or the baby’s health (1). It has GRAS (Generally Regarded As Safe) status in the US.

No study has directly pointed to any complication or problem arising out of having fennel when breastfeeding (7). It means it is up to the mother’s discretion to consume it (8). Nevertheless, you can consult a lactation expert before consuming fennel to ensure that you rule out all possible side-effects. Several hospitals and medical centers recommend expectant and lactating mothers to avoid fennel under certain circumstances (9).

When To Avoid Fennel?

Yes, avoid consuming fennel in the following scenarios:

  • A history of gynecological problems or cancer: If you have had uterine complications or cancer of ovary/breast in the past, then you must avoid fennel. Fennel contains a few compounds that mimic the female hormone estrogen. An additional dose of estrogen may cause new complications (10) (11).
  • Mother or baby has food allergy: Usually, mothers who are allergic to carrot, celery, and coriander may have a fennel allergy too as these plants belong to the same family. A mother may be aware of her allergies and can avoid fennel. But it is not known whether the baby can develop an allergy to fennel through breastmilk. However, researchers state that fennel is least likely to cause any adverse effects on the infant (12).

Watch out for any symptoms of allergy when you breastfeed the infant for the first time after having fennel. A baby with an allergy towards fennel will develop skin hives, abdominal pain, vomiting, and diarrhea, swollen face, and shortness of breath. The infant would also seem lethargic. Research has shown that fennel allergy is rare and thus it is quite unlikely to cause any complications to the breastfeeding baby (13). Nevertheless, take your baby to the doctor right away if you suspect an allergy.

Besides working towards increasing breastmilk in babies, fennel comes packed with many other benefits.

Are There Any Other Health Benefits Of Fennel?

Yes, the health benefits of fennel are in plenty.

  • Fennel aids digestion. It is also scientifically acclaimed to relieve indigestion and alleviate the formation of gas in the digestive system (14).
  • Researchers have found that regular consumption of fennel tea can help lower blood pressure in patients (15).
  • The fennel root, called fennel bulb, is an excellent source of dietary fiber and vitamins A, C, and K (16), and potassium (17).
  • Fennel oil contains several antioxidants that have an anticarcinogenic effect on cells. These properties help shield a person from premature aging and also mitigate the chances of cancer including breast cancer (18).
  • Laboratory research has shown that fennel reduces the intensity and side effects of polycystic ovary syndrome (PCOS), a condition where the ovaries enlarge with the formation of cysts. Researchers have noted that fennel could be helpful in other gynecological problems as well (19).


Having fennel for increasing milk supply has been commonly done by nursing women. Fennel seeds have been noted to have galactagogue properties, and these can be included in the diet. You can either have them raw as a mouth freshener, use them to make tea, or consume them in the form of tablets or extracts. However, before using any supplement containing fennel, it is advised that you consult a doctor or lactation expert to avoid any side effects to the baby or compromise milk quality and composition.

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Dr.Varsha Prabala

Dr.Varsha is an Ayurveda doctor with a degree in the Indian system of medicine and an MD in the field of Ayurveda Pharmacology (Dravyaguna). She earned her bachelor's degree in Ayurveda medicine from Rajiv Gandhi University of Health Sciences and MD from NTR University of Health Sciences. She has diverse work experience as a senior consultant for Government of India... more

Rohit Garoo

Rohit Garoo is a zoologist-botanist turned writer with over 8 years of experience in content writing, content marketing, and copywriting. He has also done an MBA in marketing and human resources and worked in the domains of market research and e-commerce. Rohit writes topics related to health, wellness and development of babies. His articles featured on several notable websites, including... more