Last updated: August 10, 2021

Welcome to our big fennel oil test 2022. Here we present all the fennel oils we have tested in detail. We have compiled detailed background information and added a summary of customer reviews on the internet.

We would like to make your purchase decision easier and help you find the best fennel oil for you.

You will also find answers to frequently asked questions in our guide. If available, we also offer interesting test videos. Furthermore, you will also find some important information on this page that you should be aware of if you want to buy fennel oil.


  • Fennel is a medicinal plant. Fennel oil is extracted from fennel. The healing effect is particularly strong in the oil, as the active substances are particularly concentrated in the oil.
  • The oil has a positive effect not only on the body, but it also has a positive psychological and spiritual effect.
  • Depending on the intended use, a distinction can be made between sweet fennel oil and bitter fennel oil.

The Best Fennel Oil: Our Picks

Guide: Questions you should ask yourself before buying fennel oil

How is fennel oil made?

Fennel oil is extracted from fennel seeds. Both sweet and bitter fennel seeds are used. The process of steam distillation is used.

Fenchelknollen mit Ölflasche

Fennel is a perennial plant that can grow up to 2 metres tall and contains many valuable ingredients for the human body. (Image source: / congerdesign)

The oil is extracted from the crushed seeds by steam distillation. The steam separates the essential oil from the fennel seeds. Afterwards, the distilled water is collected.

The water molecules separate from the pure fennel oil, causing the pure fennel oil to float above the water. In the process, about 50 grams of the crushed plant seeds are needed for one gram of fennel essential oil.

[/su_note] Did you know where fennel comes from?

Fennel comes from the region around the Mediterranean and from the Near East. During the Middle Ages, it was cultivated in monastery gardens and valued as a medicinal plant.[/su_note]

How does fennel oil work?

Fennel oil has a versatile effect. The oil is not only effective against physical ailments, but it also has a positive effect on the soul and psyche. The composition of fenchone and anethole can loosen stuck mucus in the respiratory tract.

Fenchon alone can be used against bacteria and fungi. Since fennel oil contains estragole and a high dosage is not healthy for the human body, fennel oil should therefore not contain more than 5% of this ingredient.

Effect on gastrointestinal complaints

Similar to turmeric oil, fennel oil has a relaxing and digestive effect on the gastrointestinal tract. Various factors, such as a diet that is difficult to digest or stress, lead to cramps or flatulence.

The oil can be used with an appropriate dosage to relieve cramps. Fennel oil leads to a faster movement of the stomach and intestines due to better blood circulation. Digestion is accelerated, flatulence is prevented and bloating is reduced.

It should be noted, however, that with an increased dose of 0.5 ml a day, the effect leads in the other direction. Fennel oil not only counteracts digestive inertia, but also cramps, as the influx of calcium into the muscle cells of the stomach and intestines is inhibited.

Effect on inflamed airways

Fennel oil has an anti-inflammatory and expectorant effect on respiratory diseases. In the cold season, colds often occur, which weaken the immune system. The cold makes the body susceptible to bacteria and germs, and the respiratory tract is particularly sensitive.

Fennel oil is helpful for illnesses that affect the upper airways, such as the nose, sinuses and throat from mucus. However, the active ingredients also have an effect on the lower part of the respiratory tract.

Fennel oil actively combats germs such as bacteria and fungi. Stuck mucus is liquefied by fennel oil so that the mucus can be excreted more easily.

An alternative to fennel oil to clear the respiratory tract can be laurel oil, for example.

How do I dose fennel oil correctly?

The dosage depends on the type of application. For an inhalation to clear the airways, 4 to 7 drops should be added to half a litre of hot, not boiling, water. It is advisable to perform the inhalation 2 to 3 times a day.

You can also enjoy the oil as a tea, so you can drink a cup of fennel tea 2 to 3 times a day. There are also ready-made products that contain fennel oil, but the concentration of the fennel oil varies. It is therefore important to always read the package leaflet and observe the maximum dosage recommended there.

Did you know how huge fennel can become?

Fennel grows up to two metres tall, its storage leaves forming a fleshy bulb-like bulb. This grows to about the size of a fist and weighs between 250 and 400 grams.

How should fennel oil be stored ?

Essential oils should be stored in a dark and cool place. It is important that essential oils are stored properly so that the valuable ingredients are not destroyed.

What is the shelf life of fennel oil?

You can find out the shelf life of essential oils from the product label. A product label always has a date printed on it that tells you by when the oil should ideally be used up.

Decision: What types of fennel oil are there and which is the right one for you?

Basically, we distinguish between these types of fennel oil:

  • Bitter fennel oil
  • Sweet fennel oil

In the following, we explain the different types and their respective advantages and disadvantages. In this way, we want to help you find the fennel oil that is best for you.

Bitter fennel oil

Bitter fennel (Foeniculum vulgare) looks yellowish to greenish-brown, smells strongly spicy and tastes slightly bitter. Bitter fennel fruits contain essential oil ("bitter fennel oil") with sweet-tasting trans-anethole (main component) and the bitter fenchone, which gives bitter fennel its slightly bitter taste.

Bitter fennel is generally not used for room scenting and aromatherapy. The fact that it is not used for aromatherapy has to do with the substances that are not tolerated by humans

Sweet fennel oil

Sweet fennel (Foeniculum var dulce) is distinctly lighter in colour, smells spicy and has a sweet aroma. The essential oil of sweet fennel contains significantly less fenchone compared to bitter fennel, so the taste of the fruits is dominated by the sweet trans-anethole. In addition, sweet fennel fruits contain fatty oil.

The difference between the essential fennel oil of sweet fennel and bitter fennel is that sweet fennel oil can be used in aromatherapy. The oil has a calming, balancing and invigorating effect on the soul. Stress can be alleviated as a result.

It should also be noted that the effects of sweet and bitter fennel oil are no different from each other. Both bitter and sweet fennel can be used for mild cramp-like complaints in the gastrointestinal area (for flatulence) and for mild menstrual cramps. They can also be used as an expectorant for coughs during a cold.

What are the advantages of fennel oil over other essential oils?

  • Helps with upper respiratory complaints
  • Helps with coughs and sore throats
  • Helps with swelling and inflammation of the eyelids
  • Helps with gastrointestinal complaints,indigestion,flatulence etc.
  • Helps against stuck mucus in the respiratory tract
  • Has anti-inflammatory properties that help against germs
  • allergic reactions in the skin and respiratory tract area
  • If the application lasts longer than two weeks, this should only be done in consultation with a doctor

Buying criteria: You can use these factors to compare and evaluate fennel oil

In the following, we will show you which criteria you can use to compare and evaluate guitar amplifiers. This will make it easier for you to get an overview and decide on a suitable and effective product.

In summary, these are the following criteria:

  • Ingredients
  • Price
  • Possible applications

In the following, you can read about the respective criteria and find out why it makes sense for you to purchase a product based on the criteria or not.


The effective ingredients are present in the fennel fruits, as they contain the pure essential oils. In the bitter fennel oil, the substance trans-anethole is present in 50 to 70%. Fenchone is present in 12 to 25% and estragole in 2 to 8%.

Ingredients bitter fennel oil sweet fennel oil
trans-anethole 50-70% about 80-95%
fenchone 12-25% 1%
estragole 2-8% up to 7%

The sweet-tasting substance trans-anethole is much more abundant in sweet fennel, about 80-95%. At the same time, only 1% fenchone and a little up to 7% estragole are found in sweet fennel oil.

It is also worth mentioning that both fennel varieties contain fatty oil as well as flavonoids, which belong to the secondary plant substances.


As already mentioned above, the prices of fennel oil vary depending on the filling quantity and the fennel variety. It should be noted that different suppliers of fennel oil have different prices. Depending on this, prices can also vary by product type.

Fennel variety prices (depending on 10ml quantity)
Bitter fennel oil from 3 to 12€
Sweet fennel oil from 4€ up to 20€

Possible applications

The application possibilities of fennel oil are as versatile as its effect. The oil can be used both externally and internally.

For external applications, the oil is usually diluted. External applications are possible such as a full bath for colds, addition to massage oil, room fragrance in aromatherapy and rubbing in against coughs.

Applications with pure fennel oil are only possible to a limited extent. Teas and tuber extracts are recommended for internal use. These help in various ways, such as inhalation against respiratory diseases, fennel tea against cramps, eye compresses and cold serums and sweets.

Facts worth knowing about fennel oil

Fennel oil during pregnancy

Pure fennel oil is not suitable for pregnant women, nursing mothers, infants and children, as the oil in concentrated form can cause respiratory distress and states of agitation. Therefore, you can resort to fennel honey and fennel tea, as they are rather less dangerous. But it is important to use fennel tea and fennel honey in appropriate quantities.

If people notice a hypersensitivity or allergy to fennel, they should definitely stay away from using fennel oil. In particular, products containing estragole should only be consumed in small quantities, as they are suspected of being responsible for genetic mutations and the development of cancer.

The historical background of fennel oil

The origin of fennel lies in the Mediterranean region. Today, however, the plant is cultivated in all temperate regions of Europe, Asia, Africa and South America. Both then and now, fennel is found in monastery gardens in particular. Fennel belongs to the umbelliferae (Apiaceae) and flowers from July to October.

Since fennel grows as a plant with a multitude of small yellow flowers that are collected in several umbels, it belongs to the group of so-called umbelliferae.

Fennel has been used by people as a medicinal plant for a long time. The Egyptians, Romans and ancient Greeks made use of its healing properties. In Germany, the medicinal plant was discovered and used as early as the 9th century.

There are various forms of fennel, the best-known and most important of which are: bitter fennel, sweet fennel and vegetable fennel. However, fennel oils are only produced from the sweet and bitter fennel varieties.

The ripe fruits of bitter fennel - Foeniculi amari fructus and sweet fennel - Foeniculi dulcis fructus are used. The essential oil present in the fruits causes the typical fennel smell, for example, when the plant is rubbed.

Image source: / 88289603