Goldenrod
In short
Summary of findings for quick reference
European goldenrod has a long tradition in Europe as a wound and urinary herb. Earlier uses are transmitted, among other sources, through Madaus’s 1938 account, which summarises medieval attributions and herbals from the 16th and 17th centuries. This does not establish a secure date for its first medicinal use. Goldenrod herb remains part of European herbal medicine for supportive urinary tract irrigation.
The clinical evidence is much weaker than the long history of use. In 2020 Fursenco and colleagues described predominantly laboratory and animal research, alongside a few methodologically weak human studies. Research has examined urine output, antimicrobial effects and effects on inflammation, among other outcomes. These findings establish neither a reliable treatment for urinary tract infections nor increased urine output without electrolyte loss.
The EMA lists goldenrod herb as a traditional medicine to increase urine output in minor urinary complaints. Appropriate fluid intake is needed; two litres in addition to the tea is not a universal requirement. It must not be used in people allergic to goldenrod or other Asteraceae, or with conditions requiring reduced fluid intake. The monograph concerns Solidago virgaurea, not the separate species Solidago canadensis and Solidago gigantea.
Clinical evidence ↔ Historical significanceWe display two separate evidence categories: clinical evidence from modern trials and historical significance from documented healing tradition. Both are valuable, but they answer different questions.Read more
In every encyclopedia entry we evaluate two distinct categories of evidence. Clinical evidence as used in trials meets a narrower but scientifically essential bar. At the same time, the hundreds of thousands of plant species worldwide have only partially been captured and tested in modern studies.
Alongside the trial picture our researchers compile a comprehensive overview of where and since when a plant has been used across different traditions of natural medicine. When a plant has been used as a medicinal plant in many cultures across many generations, that historical significance deserves to be visible too.
Our position: a truly informative overview emerges only when both categories sit side by side. We communicate transparently what counts as what.
Overview
European goldenrod (Solidago virgaurea) is a perennial plant in the daisy family (Asteraceae). Its yellow flower heads form racemes or panicles and usually flower from July to September. European herbal medicine uses the flowering aerial parts: stems, leaves and flowers. The European Medicines Agency (EMA) describes goldenrod herb as a traditional herbal medicine to increase urine output as an adjunct in minor urinary complaints.
This traditional use requires appropriate fluid intake. The effect often described as aquaretic is insufficiently studied in humans; increased urine output without appreciable electrolyte loss is not established. Goldenrod herb contains saponins, flavonoids and the phenolic glycoside leiocarposide, among other constituents. Laboratory findings suggest possible actions but do not establish an effective treatment for urinary tract infections.
History
Goldenrod has a long European history as a wound herb and a remedy for urinary complaints. In 1938 Gerhard Madaus reported a bladder-stone use attributed to Arnaldus de Villanova. This alone does not establish a securely verified first medicinal reference around 1300. Madaus also cites Lonicerus’s herbal of 1564 and Bock’s 1565 edition for wound use. A Matthiolus edition of 1626 additionally describes diuretic use for stone complaints. These historical descriptions are not modern evidence of efficacy.
In Austria, European goldenrod grows at forest edges and in clearings, among other habitats. Its dried herb is used as a medicinal tea and in bladder and kidney tea mixtures. The EMA monograph specifically concerns Solidago virgaurea and its traditional use in minor urinary complaints. The ESCOP monograph also describes urinary tract irrigation and adjunctive use in bacterial urinary tract infections; this does not replace necessary medical treatment.
Mechanism
Saponins, flavonoids such as rutin and quercetin derivatives, and leiocarposide have been investigated as possible active constituents. Individual fractions or compounds affected urine output in animal experiments, but findings on sodium and potassium excretion were contradictory. These results do not establish a mechanism that increases human urine output without appreciable electrolyte loss. The EMA monograph does not specify such a mechanism.
Goldenrod extracts and individual constituents show antimicrobial and inflammation-related effects in laboratory experiments. These depend on the preparation and experimental model and cannot be directly transferred to goldenrod tea. Whether they meaningfully relieve human symptoms remains insufficiently established. Suspected urinary tract infection requires medical assessment; goldenrod cannot replace antibiotic treatment when it is needed.
Goldenrod has been studied extensively in preclinical research, but clinical data remain limited. Research examines its constituents, possible diuretic activity, and antimicrobial and inflammation-related effects. The EMA assessment report describes open, non-randomised studies with substantial methodological limitations. The 2020 review by Fursenco and colleagues likewise considers the available human studies weak evidence.
The European monograph therefore rests on long-standing traditional use. It describes goldenrod as an adjunct in minor urinary complaints, not an established treatment for infection. The adjunctive use in bacterial urinary tract infections mentioned by ESCOP likewise does not replace necessary treatment. In practice, the specific preparation, appropriate fluid intake and contraindications remain important.
Evidence
| Outcome | Class | Grade | Effect | Studies | Refs |
|---|---|---|---|---|---|
| Irrigation therapy of the urinary tract in mild urinary complaintsThe EMA describes increased urine output as a traditional adjunctive use in minor urinary complaints. This does not establish a reliably effective treatment for urinary tract infections. Clinical studies have substantial methodological limitations.Adults with mild urinary complaints and adequate fluid intake | TraditionalTraditional use. Long-standing folk practice or EMA HMPC traditional-use monograph. | DEvidence quality grade D. Preliminary signal. A single small trial, pilot result, or laboratory or animal model. Clinical relevance unclear. This is an evidence rating, not a product endorsement. | Traditional Use | [1][2] | |
| Diuretic effectIndividual constituents and fractions affected urine output in animal models. Findings on sodium and potassium excretion conflict. The limited human studies are insufficient to confirm an electrolyte-neutral effect.Animal models and limited human investigations | TraditionalTraditional use. Long-standing folk practice or EMA HMPC traditional-use monograph. | DEvidence quality grade D. Preliminary signal. A single small trial, pilot result, or laboratory or animal model. Clinical relevance unclear. This is an evidence rating, not a product endorsement. | Traditional Use | [2] | |
| Laboratory antimicrobial activityGoldenrod extracts show variable, often modest antimicrobial effects in laboratory experiments, depending on preparation and organism. This does not demonstrate a clinically effective treatment for urinary tract infections.In-vitro investigations of extracts and constituents | TraditionalTraditional use. Long-standing folk practice or EMA HMPC traditional-use monograph. | DEvidence quality grade D. Preliminary signal. A single small trial, pilot result, or laboratory or animal model. Clinical relevance unclear. This is an evidence rating, not a product endorsement. | Preclinical Signal | [2][3] | |
| Anti-inflammatory activityGoldenrod extracts and individual constituents affect inflammatory markers in laboratory and animal models. These findings warrant further research but do not establish an anti-inflammatory effect in humans.In-vitro and animal models | TraditionalTraditional use. Long-standing folk practice or EMA HMPC traditional-use monograph. | DEvidence quality grade D. Preliminary signal. A single small trial, pilot result, or laboratory or animal model. Clinical relevance unclear. This is an evidence rating, not a product endorsement. | Preclinical Signal | [2][3] |
Usage
Forms and preparation
To make an infusion, pour boiling water over comminuted goldenrod herb and strain after the steeping time stated on the package. The EMA lists 3 to 5 grams of herb per infusion; weighing is more precise than estimating with teaspoons. The tea tastes mildly bitter and aromatic. Drink appropriately throughout the day without exceeding any medically advised fluid limit. Goldenrod herb is also found in tinctures, solid extract preparations and bladder and kidney tea mixtures. Such mixtures may contain birch leaves or horsetail herb, for example. Composition, dosage and duration differ, so follow the instructions for the specific medicine. Contraindications and appropriate fluid intake remain important for every preparation.
Dosage
For adults and adolescents aged twelve and over, the EMA lists 3 to 5 grams of comminuted goldenrod herb per infusion, two to four times daily. The traditional duration of use is two to four weeks. If symptoms persist during use or worsen, seek medical advice rather than waiting until the end of that period. Also follow the medicinal tea’s package instructions. For tinctures and extract preparations, follow the dosage for the specific medicine. Amounts cannot be transferred between products because concentration and preparation methods vary. Ensure appropriate fluid intake; tea counts towards total fluid intake. If your fluid intake is medically restricted, do not use goldenrod for irrigation.
Safety
Look-alikes
Similar plants and look-alikes
Canadian goldenrod / Giant goldenrod
Canadian goldenrod (Solidago canadensis) and giant goldenrod (Solidago gigantea) originate from North America and are invasive in parts of Central Europe. They often grow taller than European goldenrod and usually form broad, highly branched flower panicles. These species also have medicinal uses, but are distinct species. The EMA monograph on Solidago virgaurea does not apply to them.
FAQs
What does aquaretic mean, and how is it different from a diuretic?
Aquaresis means increased excretion of water without a corresponding loss of electrolytes. Diuresis more broadly means increased urine excretion; many diuretic medicines also alter salt excretion. Goldenrod is often described as aquaretic in herbal medicine, but this electrolyte-sparing effect has not been reliably established in humans. The EMA monograph describes the traditional increase in urine output and does not use the term aquaretic.
How much should I drink when using goldenrod?
Ensure appropriate fluid intake. The EMA does not prescribe a universal extra two litres; goldenrod tea counts towards total intake. The appropriate amount depends on your health and fluid needs. If reduced fluid intake has been recommended for medical reasons, such as severe heart or kidney disease, do not use goldenrod for irrigation.
Is the native European goldenrod the same as the invasive North American kinds?
No. European goldenrod is Solidago virgaurea; Canadian and giant goldenrod are Solidago canadensis and Solidago gigantea. The two North American species are invasive in parts of Central Europe and often have larger, more widely branched inflorescences. They also have histories of medicinal use, but the EMA monograph in this entry concerns only Solidago virgaurea. Height and inflorescence shape alone are insufficient for reliable identification when gathering plants.
How long can I take goldenrod tea?
The EMA lists a traditional duration of two to four weeks for goldenrod herb. This does not mean waiting that long with persistent symptoms: seek medical advice during use if symptoms persist or worsen. Fever, pain on urination, spasms or blood in the urine require prompt medical advice. The monograph provides no basis for indefinite daily use.
3 sources.
- European Medicines Agency, Committee on Herbal Medicinal Products (HMPC). Community herbal monograph on Solidago virgaurea L., herba. 2008. Source
- Cornelia Fursenco; Tatiana Calalb; Livia Uncu; Mihaela Dinu; Robert Ancuceanu. Solidago virgaurea L.: A Review of Its Ethnomedicinal Uses, Phytochemistry, and Pharmacological Activities. 2020. doi:10.3390/biom10121619
- Claudio Ferrante; Annalisa Chiavaroli; Paola Angelini; Roberto Venanzoni; Giancarlo Angeles Flores; Luigi Brunetti; Massimiliano Petrucci; Matteo Politi; Luigi Menghini; Sheila Leone; Lucia Recinella; Gokhan Zengin; Gunes Ak; Massimo Di Mascio; Francesco Bacchin; Giustino Orlando. Phenolic Content and Antimicrobial and Anti-Inflammatory Effects of Solidago virga-aurea, Phyllanthus niruri, Epilobium angustifolium, Peumus boldus, and Ononis spinosa Extracts. 2020. doi:10.3390/antibiotics9110783
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