Rhinanthus minor (Rhinanthus minor): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does Rhinanthus minor work medicinally?

Rhinanthus minor contains active compounds including aucubin, catalpol, and flavonoids, which contribute to its medicinal properties. Aucubin and catalpol are iridoid glycosides known for anti-inflammatory and antioxidant activity. The herb's traditional use for digestive complaints may relate to these compounds' effects on gastrointestinal function. However, modern research on Rhinanthus minor is limited, and the exact mechanisms of action have not been thoroughly studied in clinical settings (Evidence Level C).

Does Rhinanthus minor interact with any medications?

There is limited research on drug interactions for Rhinanthus minor. Due to its hemiparasitic nature and the presence of active compounds like aucubin, theoretical interactions with medications metabolized by the liver cannot be ruled out. Patients taking prescription medications should consult a healthcare provider before using this herb. No well-documented clinical interactions have been established due to insufficient research (Evidence Level C).

What is the recommended dosage for Rhinanthus minor?

The traditional adult dosage for Rhinanthus minor is approximately 2 grams of dried herb prepared as a tea. This preparation has been used in folk medicine for digestive complaints. Due to limited modern clinical research, standardized dosing guidelines have not been established. Users should follow traditional preparation methods and consult a qualified herbalist or healthcare provider for personalized dosing recommendations (Evidence Level C, Traditional use).

Is Rhinanthus minor safe during pregnancy and breastfeeding?

Rhinanthus minor is considered unsafe during pregnancy and should be avoided. The herb contains aucubin and other compounds that may stimulate uterine contractions or affect fetal development. There is insufficient safety data regarding use during breastfeeding, so it is recommended to avoid this herb while nursing. Women who are pregnant, planning to become pregnant, or breastfeeding should not use Rhinanthus minor without medical supervision.

What is Rhinanthus minor used for in herbal medicine?

Rhinanthus minor, also known as yellow rattle, has been used traditionally for digestive complaints, scrofula (a form of tuberculosis affecting lymph nodes), and certain eye conditions. As a hemiparasitic meadow plant, it has a history in folk medicine applications. Modern research on its efficacy is limited, though studies have identified antioxidant activity in its constituents. Clinical evidence supporting these traditional uses remains sparse (Evidence Level C, Traditional use).

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

Rhinanthus minor, commonly known as yellow-rattle, is a widespread annual root hemiparasitic plant found in European grassland habitats [PMID: 28313396, PMID: 22957160].

Background

Rhinanthus minor is a facultative root hemiparasite of the Orobanchaceae family that occurs sympatrically in Europe and is known to hybridize with R. angustifolius [PMID: 22957160, PMID: 12869524]. It acts as an ecosystem engineer by altering above- and below-ground community structures in grasslands [PMID: 21444312].

Active compounds

The plant produces lignin-rich interfacial deposits at the haustoria-host interface [PMID: 40682809]. It also utilizes the polyol mannitol as a major assimilate [PMID: 18419740].

Mechanism of action

R. minor extracts xylem sap, mineral nutrients, and water from host roots via connective structures called haustoria [PMID: 12869524, PMID: 17008350]. It maintains high transpiration rates by keeping stomata open day and night, despite high internal abscisic acid (ABA) concentrations [PMID: 12869524]. It can also gain organic carbon heterotrophically from its host [PMID: 20179964].

Evidence summary

The available evidence consists entirely of botanical, ecological, and physiological studies (Level D) focusing on the plant's parasitic nature, genetic structure, and impact on grassland ecosystems; there are no clinical trials or human medical studies.

PubMed sources

1.PMID: 22957160 (2012) — A European phylogeography of Rhinanthus minor compared to Rhinanthus angustifolius: unexpected splits and signs of hybridization. · Ecology and evolution
2.PMID: 12869524 (2003) — Water flows in the parasitic association Rhinanthus minor/Hordeum vulgare. · Journal of experimental botany
3.PMID: 17008350 (2006) — Differential resistance among host and non-host species underlies the variable success of the hemi-parasitic plant Rhinanthus minor. · Annals of botany
4.PMID: 28313396 (1992) — The role of the hemiparasitic annual Rhinanthus minor in determining grassland community structure. · Oecologia
5.PMID: 18211886 (2008) — Suppression of host photosynthesis by the parasitic plant Rhinanthus minor. · Annals of botany

Rhinanthus minor

Sources & Citations

Calculate a safe dose of Rhinanthus minor