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Also indexed as:Marrubium vulgare
Horehound: Main Image© Martin Wall
Botanical names:
Marrubium vulgare

Parts Used & Where Grown

Horehound is a perennial plant with small white flowers found growing in the wild throughout Europe and Asia. All parts of the plant are used medicinally.1

  • Reliable and relatively consistent scientific data showing a substantial health benefit.
  • Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit.
  • For an herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support.

Our proprietary “Star-Rating” system was developed to help you easily understand the amount of scientific support behind each supplement in relation to a specific health condition. While there is no way to predict whether a vitamin, mineral, or herb will successfully treat or prevent associated health conditions, our unique ratings tell you how well these supplements are understood by the medical community, and whether studies have found them to be effective for other people.

For over a decade, our team has combed through thousands of research articles published in reputable journals. To help you make educated decisions, and to better understand controversial or confusing supplements, our medical experts have digested the science into these three easy-to-follow ratings. We hope this provides you with a helpful resource to make informed decisions towards your health and well-being.

This supplement has been used in connection with the following health conditions:

Used for AmountWhy
Bronchitis
Refer to label instructions 1 star[1 star]
Horehound is an expectorant herb, meaning it helps loosen bronchial secretions and eliminate mucus.
Cough
Refer to label instructions 1 star[1 star]
Horehound has a long history of use for relieving coughs.
Indigestion, Heartburn, and Low Stomach Acidity
Refer to label instructions 1 star[1 star]
Horehound’s major active constituent increases the flow of saliva and gastric juice.
Loss of Appetite
Refer to label instructions 1 star[1 star]
Horehound contains a constituent that may increase the flow of saliva and gastric juice, to stimulate the appetite.

Traditional Use (May Not Be Supported by Scientific Studies)

Horehound was reportedly first used in ancient Rome by the physician Galen, who recommended it as a therapy for coughs and other respiratory ailments. Like Galen, Nicholas Culpeper, the 17th-century English pharmacist, commented that it was helpful for a cough and was also useful in helping remove stubborn phlegm from the lung. Similarly, American Eclectic physicians (doctors who recommended herbs) of the 19th century remarked on its value as a medicinal plant not only for coughs and asthma but also in menstrual complaints.2

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The information presented by TraceGains is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires December 2025.