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Medicinal plants: what the research says
A free place to look up plants that people have used for health for centuries, including plants used to support the immune system and the airways. For each plant: what studies in people found, how strong the evidence is, who should be careful, which medicines it can interact with, and where to read the original research.
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Where the information comes from
Every statement is summarised in our own words from public, independent sources, and each plant links to them:
- NIH National Center for Complementary and Integrative Health, Herbs at a Glance
- Cochrane Library systematic reviews
- Peer-reviewed systematic reviews indexed in PubMed
- Herbal monographs of the European Medicines Agency and the World Health Organization for further reading
Evidence levels on this page: Some evidence means several studies in people point the same way; Early / mixed means small, few or conflicting studies; Not enough evidence means research does not show a benefit yet. In the United States, herbal dietary supplements are not approved by the FDA before they are sold, and their labels may not claim to treat, cure or prevent a disease.
More plants are added regularly. Suggest a plant or a study: contact us.
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