Journal

Labrador-tea

July 2, 2026 · Omnia Sana
Rhododendron tomentosum
Family: Ericaceae  ·  Parts used: Leaf, Stem  ·  Also known as: Labrador tea, bog tea, Hudson's Bay tea, marsh tea

Key actions

Anti-inflammatoryAntioxidantDiuretic

Traditional & clinical uses, by strength of evidence

  • Swelling / fluid retentionLimited
  • Arthritis / joint painTraditional
  • Inflammation (general)Traditional
  • Respiratory supportTraditional
  • Skin irritationTraditional
  • Urinary supportTraditional
  • Urinary tract infection (UTI)Traditional

Selected studies & references

ClinicalAssessing the Effectiveness of Arnica montana and Rhododendron tomentosum (Ledum palustre) in the Reduction of Ecchymosis and Edema After Oculofacial Surgery: Preliminary Results (2017)
PreclinicalConfusing boundaries of the Labrador tea species: dispersal history explains the lack of clear species structure (2024)
PreclinicalChemical variability of Rhododendron tomentosum (Ledum palustre) essential oils and their pro-apoptotic effect on lymphocytes and rheumatoid arthritis synoviocytes (2019)
PreclinicalTwo new taraxerane-type triterpenes from Ledum palustre L. (2019)
PreclinicalSupercritical CO2 extract and essential oil of aerial part of Ledum palustre L. – Chemical composition and anti-inflammatory activity (2014)
PreclinicalEvaluation of extracts and oils of tick-repellent plants from Sweden (2005)
PreclinicalComposition of essential oil of Ledum palustre (1981)
TraditionalPhytochemical Profiling and Biological Activities of Rhododendron subsect. Ledum: Discovering the Medicinal Potential of Labrador Tea Species in the Northern Hemisphere (2024)

All 13 studies in the Knowledge Finder →

Educational use only. This profile summarises traditional and scientific sources for reference. It is not medical advice and not a substitute for a qualified practitioner. Some plants carry safety cautions and drug interactions — always check before use.

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