Quick Summary

Labrador Tea (Rhododendron groenlandicum) is an herb in the Ericaceae family traditionally used by indigenous peoples. Scientific research specific to this herb remains limited, with no direct clinical trials or meta-analyses available. Existing research mainly involves related species or general findings on the plant family, supported primarily by preclinical and experimental data. Currently, evidence for clinical efficacy or safety in humans is insufficient and requires further study.

What is It?

Labrador Tea is a perennial shrub native to northern parts of North America and Greenland. It belongs to the Ericaceae family, which includes many plants known for their phenolic bioactive compounds. It is traditionally harvested for its aromatic leaves used in teas and remedies.

Traditional Uses

Indigenous peoples have traditionally used Labrador Tea for various purposes, including as a soothing herbal tea and in rituals. Its use historically includes applications for general wellness, and it has been suggested to have antimicrobial and anti-inflammatory properties based on traditional knowledge.

Active Compounds

The herb contains polyphenols, flavonoids, and other phenolic compounds typical of the Ericaceae family. These constituents are studied for their antioxidant and potential bioactive effects though specific phytochemical profiles of Rhododendron groenlandicum require further elucidation.

Potential Benefits with Evidence Levels

  • Cardioprotection: Insufficient/Preclinical – General reviews highlight polyphenols and flavonoids in plants as contributors to heart health, but no clinical trials have specifically investigated Rhododendron groenlandicum (Morariu-Briciu DM et al., 2026).
  • Antidiabetic Effects: Preclinical/Review – Related plants in the Ericaceae family show potential antidiabetic properties mainly through phenolic compounds in laboratory models; however, no direct clinical evidence exists for R. groenlandicum (Popescu M et al., 2025, Omale S et al., 2023).
  • Oral and Dental Health: Preclinical/Traditional Use – Herbal remedies from the Ericaceae family suggest antimicrobial and anti-inflammatory potential for oral hygiene; however, this lacks direct clinical research involving Labrador Tea specifically (Anwar MA et al., 2025).
  • Other Benefits: Preclinical – Phenolic compounds found in related Rhododendron species have demonstrated antioxidant activity in biochemical assays, though clinical application or therapeutic claims remain unsupported (Kokotkiewicz A et al., 2025).

Side Effects

No documented adverse effects specific to Labrador Tea were identified in the scientific literature reviewed.

Drug Interactions

No studies or reports on herb-drug interactions involving Rhododendron groenlandicum have been found.

Who Should Avoid It

Due to limited safety data, pregnant or breastfeeding individuals should avoid using Labrador Tea unless under medical supervision. No other specific contraindications have been established because clinical data are insufficient.

Evidence Limitations

  • Lack of direct human clinical trials or controlled studies on Rhododendron groenlandicum.
  • Most evidence derives from related species or general Ericaceae family research, limiting herb-specific conclusions.
  • Predominantly preclinical and traditional use data; clinical relevance is uncertain.
  • No standardized extracts, dosing guidelines, or formulations exist.
  • Safety, adverse effect, and interaction data specific to Labrador Tea are lacking.

References

Last Reviewed

June 2024

Disclaimer: This page is for informational purposes only. Labrador Tea and its extracts have not been established as safe or effective for any condition by regulatory authorities. Consult a healthcare professional before starting any new herbal regimen, especially if pregnant, breastfeeding, or taking medications.