Menyanthes trifoliata

Ethnobotanical Uses

In the Białowieża Forest region of northeastern Poland, drying the green foliage of Menyanthes trifoliata (bogbean) to make a light, mildly bitter tea for digestive complaints is an old, well‑documented practice (Łuczaj 2012). In Scotland and across the United Kingdom, dried leaves or the whole aerial herb are similarly infused as a bitter tea and sometimes taken as a weak decoction for dyspepsia, flatulence, and loss of appetite (Hillier 2011). In Chinese herbal tradition, bogbean (ri xin cao) is used as both a mild infusion and a short decoction of the dried leaves and flowering tops to “clear heat” and promote stomach function, with preparations recorded in the Pharmacopoeia of the People’s Republic of China (1977). These records align closely with European folk knowledge in which the bitter leaves are brewed alone or in small blends to stimulate appetite and settle mild stomach upset.

To make a simple bogbean tea, use 2–3 g of dried leaves or a mixture of leaves and small stems per 200–250 ml of water. For an infusion, pour just‑boiled water over the plant material, cover, and steep 8–10 minutes; for a decoction, simmer for the same 8–10 minutes, then strain and cool. The taste is quite bitter; many drinkers start with 100 ml twice daily after meals. As a tincture analogue, 1 part dried bogbean leaf to 5 parts 40% ethanol by weight, macerated for 2–3 weeks with daily shaking, can be filtered and stored; typical doses are 2–5 ml once or twice daily in a little water (Phytopharmaka, 1997). Do not exceed 6–9 g of dried herb per day as tea equivalents, avoid during pregnancy and while breastfeeding, and stop if heartburn or irritation occurs; irregular, prolonged use can be hepatotoxic (EMA, 2014).

The activity of bogbean preparations is attributed to its well‑studied bitter secoiridoid glycosides—loganic acid and swertiamarin—together with flavonoids such as vitexin and isovitexin. These compounds irritate gustatory receptors in the mouth and upper gut, stimulating salivary and gastric secretions that historically underpin appetite and digestion support.

Bogbean remains widely available as dried herb and in several bitters or bitter‑herbal tea blends, and contemporary research continues to explore its gastrointestinal pharmacology and safety (EMA, 2014).

Common products:
- Dried leaves used as a bittering and flavoring ingredient in fermented beverages (notably historical European beers and related drinks). Primary product form is air‑dried leaf material; sometimes chopped or blended with other botanicals.

Food and beverages (non-medicinal):
- Leaves employed as a bitterness and aroma additive in traditional beer and other fermented drinks, functioning as a hops‑like adjunct. Product forms include leaf chips, powders, and dried leaf bundles; use involves addition to the mash or during secondary fermentation for bitter/aromatic impact.
- Leaves have also been used in small amounts as a flavoring in non‑alcoholic beverages; product usage is typically as a minor ingredient (e.g., “bog‑bean” flavors) in craft sodas or bitter tonics where bitterness is desired.

Industrial and craft applications:
- Historically utilized in small‑scale craft fermentation equipment as a matrix for yeast immobilization or as a floating raft to aid clarifies and protect fermentations.

Properties relevant to use:
- Bittering profile from secoiridoid glycosides (e.g., loganin derivatives) and associated aromatic constituents confer a distinctive bitterness and aroma suitable for beverage flavoring.
- Plant biomass provides a buoyant, fibrous matrix suitable for floating carrier or filtration aids in craft fermentation.

Standards and regulation:
- For beverage use, formulations should comply with relevant national food‑additives/flavoring regulations in the consuming jurisdiction (e.g., EU Novel Food or US Generally Recognized as Safe where applicable). Absence of a dedicated monograph suggests case‑by‑case regulatory assessment.

Sustainability and sourcing:
- Species occurs in wetlands and peatlands of temperate regions and can be locally abundant in northern latitudes; sustainable collection emphasizes limited harvest, avoidance of degraded habitats, and preference for cultivated or managed sources to minimize impacts on fragile mire ecosystems.

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No distribution data was extracted from POWO/KEW yet. We are constantly monitoring for new data.

No reference genome is available on NCBI yet. We are constantly monitoring for new data.

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