Ancient Root, Modern Lab: Horseradish’s Antibacterial Power Against UTIs
By edisonreed // 2026-10-29
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When the root vegetable horseradish is shredded, crushed, or chewed, the compounds known as isothiocyanates are activated. These compounds have shown activity against bacteria associated with urinary tract infections (UTIs) in laboratory settings. But these findings do not establish that a homemade horseradish tincture can prevent or treat an active infection. An article by the Epoch Times advises that individuals with UTI symptoms seek medical evaluation and consult a healthcare professional before using herbal remedies. The article describes horseradish as long used in herbal traditions and drawing attention for urinary tract support [1]. Traditional use of horseradish root includes treatment of bacterial infections of the respiratory tract and urinary bladder [1]. Horseradish has long been used in folk medicine as a remedy for respiratory conditions, urinary tract infections, rheumatism, and digestive issues, Dr. Christopher Hobbs, Ph.D, states [2].

Traditional Use and UTI Burden

Symptoms include frequent or urgent urination, burning during urination, lower abdominal discomfort, and, in some cases, incontinence, the article reports. Roach wrote that traditional systems value horseradish for its warming properties, while conventional medicine targets bacteria; the article presents both perspectives [1]. The article's description of UTI prevalence and recurrence aligns with data cited by other sources. Hobbs notes that horseradish has a history of use in urinary conditions, and modern herbalists and naturopaths utilize its antimicrobial and mucolytic properties [2]. A 2017 study in the journal Frontiers in Pharmacology states that traditionally, horseradish root is used to treat bacterial infections of the respiratory tract and urinary bladder [3].

Antibacterial Compounds and Research

The Epoch Times article states that isothiocyanates, including allyl isothiocyanate (AITC), are activated when the root is shredded, crushed, or chewed [1]. These compounds enter the bloodstream after digestion and are eventually removed through urine, according to the article. Laboratory studies have shown antibacterial activity, including against UTI-associated bacteria, the article reports [1]. Researchers have studied horseradish combined with nasturtium for recurrent UTIs, particularly in women with frequent infections, according to the article [1]. The article states that these findings involve specific herbal preparations and do not establish that a homemade tincture would be effective. The scientific literature supports the presence of antibacterial compounds in horseradish. A 2008 study in the Journal of the Science of Food and Agriculture found that AITC, the pungent component of Japanese wasabi (a relative of horseradish), is produced via degradation of the mustard oil glycoside sinigrin by the enzyme myrosinase [4]. The study investigated the anti-influenza virus activity of wasabi leaf extract and suggested that extracts of leaves, stems, roots, and rhizomes may be of less concern in terms of adverse effects on humans because they are natural products [4]. A 2021 review in the journal Horticulturae states that diluted horseradish juice is used as an antibiotic mouthwash in the treatment of periodontal disease and that horseradish has great potential for improving human health [5]. The review notes that horseradish is a flavorful pungent herb that has been used for centuries to enhance the flavor of food, aid in digestion, and improve human health [6]. Cleveland Clinic states that horseradish has anticancer, antibacterial, and antifungal properties and that it also helps lower inflammation and clear up respiratory infections [7]. However, the clinic's article does not provide specific data on UTI treatment. Drugs.com notes that animal data suggest potential antibacterial and hypotensive effects for horseradish, and that traditional use for colds and respiratory infections was 20 grams per day [8].

Preparation and Safety Guidance

It lists a suggested herbalist dosage from Roach's practice and states that homemade tinctures can vary in strength [1]. The article warns that too much fresh horseradish can cause gastrointestinal distress, sweating, or a burning sensation in the mouth [1]. It advises consulting a qualified herbalist or healthcare professional before using horseradish tincture for urinary symptoms, especially when taking medications or managing underlying conditions [1]. Hobbs states that horseradish is a pungent medicinal herb with a history of use in respiratory, digestive, and urinary conditions [2]. He notes that its glucosinolates are a focus in pharmacological and cancer research [2]. The 2021 Horticulturae review describes horseradish as a neglected and underutilized plant species with potential for improving human health [5].

When to Seek Medical Care

The Epoch Times article states that UTIs can worsen without proper treatment and lists burning, urgency, frequent urination, lower abdominal pain, blood in urine, or persistent symptoms as reasons to contact a healthcare professional [1]. It states that urgent care is advised for fever, chills, back or side pain, nausea, vomiting, severe pain, pregnancy, kidney disease, diabetes, immune suppression, or UTI symptoms in men or children [1]. The article states that horseradish is not a substitute for medical care when a UTI requires treatment [1]. It advises that individuals with UTI symptoms seek medical evaluation and consult a healthcare professional before using herbal remedies [1]. According to Cleveland Clinic, horseradish has antibacterial properties and may help clear up respiratory infections [7]. However, the clinic's article does not address UTIs specifically. Hobbs notes that horseradish has been used in folk medicine for urinary tract infections, but he does not provide guidance on when to seek medical care [2].

Conclusion

The Epoch Times article states that horseradish shows how traditional remedies and modern research can sometimes meet in practical ways [1]. It states that horseradish may offer another tool to support urinary tract health but is not a substitute for medical care [1]. Laboratory studies have shown antibacterial activity for horseradish compounds, including against UTI-associated bacteria, but these findings do not establish that a homemade tincture can prevent or treat an active infection [1]. The article advises medical evaluation for UTI symptoms and professional consultation before using herbal remedies [1].

References

  1. Horseradish: An Ancient Remedy With Modern Antibacterial Potential. https://www.theepochtimes.com/health/how-horseradish-compounds-may-help-fight-uti-related-bacteria-6099218
  2. Horseradish - Dr. Christopher Hobbs, Ph.D.. https://christopherhobbs.com/herbal-therapeutics-database/herb/horseradish/
  3. Evaluation of an Aqueous Extract from Horseradish Root .... https://pmc.ncbi.nlm.nih.gov/articles/PMC5274677/
  4. Anti-influenza virus activity of extract of Japanese wasabi leaves discarded in summer. dvips 5.83 Copyright 1998 Radical Eye Software. Journal of the Science of Food and Agriculture 88:1704–1708 (2008)
  5. Horseradish: A Neglected and Underutilized Plant Species .... https://www.mdpi.com/2311-7524/7/7/167
  6. Horseradish: A Neglected and Underutilized Plant Species .... https://www.researchgate.net/publication/352861641_Horseradish_A_Neglected_and_Underutilized_Plant_Species_for_Improving_Human_Health
  7. 4 Health Benefits of Horseradish. https://health.clevelandclinic.org/horseradish-benefits
  8. Horseradish Uses, Benefits & Dosage. https://www.drugs.com/npp/horseradish.html

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