Centaury: Benefits, Uses and Precautions

Dr. Boris Wydoff

Common centaury (Centaurium erythraea) is a herbaceous plant in the gentian family with a distinctly bitter taste. According to herbal medicine references, it has traditionally been used as a bitter remedy to stimulate appetite and digestive activity. The herb is used in infusions, decoctions, and herbal mixtures.

What is centaury, and how can you identify it?

I describe common centaury as a medicinal plant that has long been featured in herbal guides. Its Latin name is Centaurium erythraea. References also include closely related names such as lesser centaury and common centaury.

This is an annual herbaceous plant. It usually grows 15–50 centimeters tall. Its stem is upright and branched. A basal rosette of leaves grows at the base. The plant has a short, rough, downy covering.

Centaury grows in dry meadows, woodland clearings, and along forest edges. It can also be found on fallow land and growing as a weed in fields. According to botanical descriptions, it is widespread in the European part of Russia, the Caucasus, Crimea, Central Asia, and Western Siberia. The plant is also known in Western Europe.

Centaury has reddish flowers. The herb is the part used for medicinal purposes. References state that the above-ground parts are collected before the flowers open, while the basal leaves are still well developed.

The plant has almost no smell. Its main characteristic is its distinctly bitter taste. This bitterness is the reason for its long-standing use in herbal medicine.

Where does centaury grow naturally?

Centaury prefers relatively dry conditions. It is described as growing in meadows, woodland clearings, and forest edges, as well as on fallow land and fertile fields, where it can grow as a weed.

Botanical sources associate its range with more than the European part of Russia. The plant is also widespread in Western Europe and in some areas of North Africa and the Near East. In Russia, it is more commonly found in the central and southern parts of European Russia, as well as in the Caucasus, Crimea, Central Asia, and Western Siberia.

This wide distribution helps explain why centaury has long been known in traditional herbal medicine in different regions. Older sources also record local names for the plant, including serdachnik, centaury, tysiachik, serdeshnik, golden herb, zolotukha, and semisilnik.

How can you distinguish centaury from a similar species?

When harvesting the plant, it is important not only to look for red flowers but also to assess its size and check for a basal rosette.

Another species described as acceptable for collection is lesser centaury — Centaurium pulchellum Druce. It is noticeably smaller, reaching approximately 5–15 centimeters in height. Its stem branches from the base, and it has no basal rosette. Its flowers are also red.

The centaury described as medicinal raw material is characterized by a larger size and a well-developed basal rosette. Therefore, when collecting it yourself, you should not rely on flower color alone.

Why is centaury so bitter?

According to herbal medicine references, centaury herb contains bitter substances. These include bitter glycosides, gentiopicrin, swertiamarin, and other compounds.

Its composition is also reported to include the alkaloid gentianine, the flavone glycoside centaurin, resin, wax, mineral salts, and other substances. Older botanical descriptions specifically mention erythrocentaurin. When exposed to sunlight, its crystals can turn pink and then bright red.

References describe an infusion of the herb diluted at a ratio of 1:2000 as having a bitter taste. This is associated with its bitter glycoside content. The plant's bitterness determines its traditional use. Centaury is classified as a bitter herb — a plant used to stimulate appetite and digestive activity.

What compounds does centaury contain?

The chemical composition of the herb is described in somewhat greater detail in different references. In addition to gentiopicrin and other bitter glycosides, erythaurin and erythrocentaurin are mentioned. Ascorbic acid, oleanolic acid, essential oil, and mucilage have also been identified. Other substances named in older sources include resin, wax, and mineral salts.

The alkaloid gentianine is described separately. One reference estimates its content at approximately 0.6–1%. The plant's composition is associated primarily with its pronounced bitterness, which is noticeable even in a highly diluted infusion.

Erythrocentaurin has an interesting characteristic. Its colorless crystals turn pink when exposed to sunlight and then become bright red. When heated to 130 °C, they become colorless again.

Centaury: Benefits, uses, and what it has traditionally been used to treat

The main use highlighted in herbal references is centaury's role as a bitter remedy. It has traditionally been used to stimulate appetite and support digestion. Herbal guides describe the herb as an ingredient in appetite-stimulating and stomach-supporting mixtures. It is also used to prepare bitter tinctures. Herbal medicine references mention the alkaloid gentianine as well, attributing an anthelmintic effect to it.

Therefore, the question “what does centaury treat?” should be considered in light of what the sources actually describe. The plant's traditional use is primarily associated with appetite and digestion, not with proven effectiveness for every disease. Information from older herbal guides does not replace medical assessment and a doctor's recommendations.

How are bitter herbs associated with digestion?

A medicinal plant reference classifies centaury among plants containing bitter glycosides. Such plants have traditionally been used as bitters to stimulate appetite.

The same description states that bitters increase stomach peristalsis and gastric juice secretion. This explains why centaury has long been included in stomach-supporting and appetite-stimulating herbal mixtures.

Medical references also describe centaury herb in the form of an infusion or decoction for gastritis with reduced secretion, certain types of dyspepsia, and flatulence. These statements come from reference descriptions of the plant's uses.

What makes common centaury interesting?

When people talk about common centaury, they most often mention its bitterness. This characteristic is the basis of its traditional use.

According to herbal references, the herb is used as a bitter remedy to support appetite and digestive function. It is included in various herbal mixtures and used to prepare infusions and tinctures.

Older descriptions mention different traditional uses of the plant. However, these accounts belong to traditional herbal medicine and are not universal recommendations for self-treatment. I would emphasize a simple principle: any herbal remedy should be used thoughtfully. A bitter taste does not mean the plant is suitable for everyone.

How was centaury used in the past?

Centaury has been known as a medicinal plant since ancient times. A medicinal plant reference notes that it was already mentioned in herbal guides from the 13th century.

Several names and stories are associated with it. The scientific genus name Centaurium is linked to a red-flowered plant mentioned by Dioscorides. According to Pliny, the centaur Chiron used centaury, which gave rise to the theory that the name comes from the Greek word “kentaureion,” meaning “centaur's herb.”

There is another explanation. According to this version, the word centaurium is associated with the meaning “100 gold pieces.” The story tells of a wealthy man who paid this amount for treatment, after which the physician accidentally added another zero to the number.

The history of its use continued into more recent times. Before the First World War, centaury was collected as medicinal raw material, supplied to pharmacies, and sold to herb buyers.

How to take centaury: Forms of use described in references

The medicinal raw material is the centaury herb. References describe it both as a standalone ingredient and as a component of herbal mixtures.

One option is an infusion of the herb. A reference gives the following proportion: 10.0 g of herb per 200 ml of water. The stated amount to take is 1 tablespoon. The source describes this infusion as a bitter remedy to stimulate appetite and also mentions it in traditional descriptions involving certain digestive conditions.

The schedule for taking this particular infusion is not specified in the cited description. Therefore, you should not apply instructions from other recipes to it.

Herbal references also describe a bitter tincture. In one version, centaury herb and gentian are used in 4 parts each, calamus rhizomes in 2 parts, and the remaining ingredients in 1 part each. Alcohol is added until 65 parts of tincture are obtained. For this preparation, the stated amount is 20 drops 2 times a day before meals.

Other herbal mixtures are also described. Their ingredients and proportions vary. Therefore, the dosage from one recipe cannot automatically be applied to another. The answer to the question “how should centaury be taken?” depends on the specific preparation, and recipes listed in references should not be treated as a universal treatment plan.

What other herbal mixtures contain centaury?

Traditional herbal references include centaury in a large number of multi-ingredient preparations. It has been combined with yarrow, St. John's wort, calamus, mint, caraway, bogbean, and other plants.

For example, one described mixture contains centaury, plantain, bitter wormwood, and juniper cones and berries. It is prepared as a water-based decoction. Another mixture combines centaury with horse sorrel and is also classified as a stomach remedy.

Other mixtures combine bitter herbs with plants traditionally used for various digestive complaints. These include combinations of centaury with tormentil, St. John's wort, elecampane, and other herbs.

These recipes demonstrate the breadth of centaury's traditional use, but they also reveal another characteristic: centaury was rarely the only ingredient in a complex herbal mixture.

How to prepare and drink centaury

The question “how to prepare and drink centaury” often concerns making a simple infusion. Herbal references give the following proportion: 10.0 g of herb per 200 ml of water.

However, it is important to distinguish the preparation method from the schedule for taking it. The description of the simple infusion specifies 1 tablespoon per dose, but does not provide a separate schedule. Therefore, you should not automatically add a frequency or duration of use that is absent from the original description.

Other options involve complex herbal mixtures. For example, one described mixture contains centaury herb, St. John's wort, chamomile flowers, mint leaves, and marsh cudweed. Each ingredient is used in an amount of 20.0 g. An older reference specifies taking 1/2 cup of the decoction in the morning and evening, 40 minutes before meals.

Another mixture contains centaury, plantain, St. John's wort, marsh cudweed, common knotgrass, yarrow, mint, caraway, and calamus. The reference specifies taking 1/3 cup of the decoction 4 times a day, 1 hour after meals.

These recipes come from herbal medicine references. They should not be considered a substitute for modern medical care.

How was centaury tincture prepared?

A reference describes a bitter tincture made with 40% alcohol. Its ingredients include centaury herb and gentian, 4 parts each; calamus rhizomes, 2 parts; and water clover leaves, wormwood herb, and mandarin peel, 1 part each.

40% alcohol is added until 65 parts of tincture are obtained. The description characterizes it as a clear, brownish-yellow liquid with an aromatic, bitter-spicy taste.

For this specific preparation, the stated amount is 20 drops 2 times a day before meals. This is a separate recipe, so its proportions and dosage should not be applied to a simple herbal infusion.

How to harvest and store centaury herb

Centaury herb is harvested during flowering. One reference states that it should be collected before the flowers open, while the basal leaves are still well developed. During harvesting, the entire plant is pulled up with its basal leaves, and the roots are then removed. Root material is undesirable because it contaminates the raw material and increases its ash content.

For drying, the herb is laid out in rows, with the flower clusters facing the same direction. Another described method is to dry small bunches in a well-ventilated room or outdoors in the shade.

Light exposure is undesirable during drying and storage. References note that centaury flowers fade easily.

Correct identification is important when collecting the plant. Herbal guides describe another species, lesser centaury, as also acceptable for collection. It differs in its smaller size and lack of a basal rosette.

What should you consider when harvesting the herb?

Another description recommends collecting the raw material specifically at the beginning of flowering. The condition of the basal leaves is a useful guide: they should not yet have started turning yellow or drying out.

The plant is usually pulled up by hand together with its basal leaves, after which the roots are cut off. This method helps preserve the required above-ground parts while preventing excess root material from contaminating the medicinal herb.

For drying, the herb is laid out in rows with the flower clusters facing the same direction. This makes subsequent packing easier. Another described method is to tie the plants into small bunches and hang them in a well-ventilated room or dry them outdoors in the shade.

Light exposure is undesirable during drying and storage because the flowers fade easily. Therefore, dried raw material is best kept protected from light.

How to store centaury herb

Store the dried herb in a dry place protected from light. Before use, check the herb's appearance and make sure there are no unwanted impurities. Proper harvesting is important when the plant is intended for medicinal use. If the plant has been misidentified or the raw material contains unwanted parts, the quality of the herb decreases.

How to find common centaury abroad

In the United States, look for centaury, common centaury, or European centaury. In Germany, the plant is called Tausendgüldenkraut or Echtes Tausendgüldenkraut, and medicinal raw material may be labeled *Centaurii herba*. In France, the names petite centaurée, centaurée petite, and érythrée are used. The Latin name is *Centaurium erythraea*.

The plant is sold as dried, cut herb for infusions, as well as in tinctures and liquid extracts. In the United States, alcohol-free liquid drops are also available as a dietary supplement. In France, dried flowering aerial parts are sold for tisane and tinctures.

You can look in specialist herbal shops, some pharmacies, herboristeries, and online stores selling herbs and supplements. In Germany, look for Arzneitee in pharmacies and online pharmacies.

Check the packaging for *Centaurium erythraea* and a reference to the flowering aerial parts: stems, leaves and flowers, *Kraut*, *parties aériennes fleuries*, or *sommités fleuries*. Roots and fruits are not the required raw material.

Sales regulations differ between countries. For example, in the United States, supplements do not undergo prior FDA approval for safety or effectiveness.

Contraindications and precautions

The question of contraindications for common centaury is primarily about using the plant safely. According to current safety information, medicinal use of centaury is not recommended for children and adolescents under 18 because of insufficient data. Its safety for medicinal use during pregnancy and breastfeeding has not been established. Therefore, such use should be avoided.

A known hypersensitivity to the plant is a contraindication. Safety references also state that centaury should not be used by people with gastric or duodenal ulcers.

Herbal remedies should be used with caution. If you take medication regularly, discuss using the herb with a healthcare professional.

When to see a doctor

If symptoms are persistent or severe, it is important to consult a doctor. This includes ongoing digestive problems, pain, nausea, and other conditions that require investigation to determine their cause. Before using the herb, discuss it with a healthcare professional if you are pregnant, breastfeeding, considering it for a child, or living with a chronic condition. If signs of an allergic reaction appear, stop taking the plant and seek medical advice. Herbal remedies should not replace diagnosis and treatment when these are necessary.

Boris Wydoff — naturopath and author, Ph.D. in nutrition. For over fifty years I have helped people restore health through nutrition, cleansing and the power of the mind — in Europe, America and Asia. About the author →

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