Omnia SanaPlant Comparison
Bay-leaf willowherb vs Common Juniper
A side-by-side comparison of two medicinal plants — every documented constituent, action, use, safety note and cited source, assembled automatically from the Omnia Sana database.
At a glance
Bay-leaf willowherb and Common Juniper: they share 5 indicated uses (cancer (anticancer research), infection (general), urinary support, …); 3 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Bay-leaf willowherb | Common Juniper | Verdict |
|---|---|---|---|
| Cancer (anticancer research) | 2/10 | 2/10 | Comparable evidence |
| Infection (general) | 1/10 | 1/10 | Comparable evidence |
| Urinary support | 5/10 | 1/10 | Stronger for Bay-leaf willowherb |
| Urinary tract infection (UTI) | 5/10 | 1/10 | Stronger for Bay-leaf willowherb |
| Wounds | 1/10 | 1/10 | Comparable evidence |
Evidence scores (1–10) are computed from the tier of each cited source. “Comparable” means the two scores are within one point. Follow a score to its detailed sources.
Key Constituents
Characteristic Epilobium polyphenols underlying the anti-inflammatory and prostate activity; a genus review identifies oenothein B as the dominant constituent and likely driver of the antimicrobial, anti-inflammatory, anti-proliferative and antioxidant effects.
Antioxidant constituents.
Sterols associated with benign prostatic hyperplasia support.
Berry essential oil dominated by alpha-pinene, beta-pinene, sabinene and limonene, giving the characteristic aroma and the antimicrobial activity.
Antioxidant and astringent supporting constituents.
Pharmacological Actions
Traditional & Indicated Uses
inferred from anti-inflammatory action
inferred from anticancer action
inferred from antimicrobial action
inferred from anti-inflammatory action
Supports lower urinary tract symptoms of benign prostatic hyperplasia (prostate support) - a genus Epilobium review notes traditional BPH use attributed mainly to oenothein B, though clinical evidence is not yet conclusive
inferred from anti-inflammatory action
Antibacterial, including against Escherichia coli (urinary support); Supports lower urinary tract symptoms of benign prostatic hyperplasia (prostate support) - a genus Epilobium review notes traditional BPH use attributed mainly to oenothein B, though clinical evidence is not yet conclusive
Supports lower urinary tract symptoms of benign prostatic hyperplasia (prostate support) - a genus Epilobium review notes traditional BPH use attributed mainly to oenothein B, though clinical evidence is not yet conclusive
inferred from anticancer action
inferred from digestive action
inferred from antimicrobial action
inferred from diuretic action
inferred from diuretic action
inferred from diuretic action
Safety, Cautions & Contraindications
Lower urinary tract / prostate symptoms must be medically assessed first to exclude prostate cancer; willowherb is a supportive measure, not a substitute for diagnosis and treatment.
Well tolerated over three months in clinical use; longer-term safety data are limited.
Avoid in pregnancy. Juniper is not recommended during pregnancy (EMA/HMPC, 2023; Health Canada, 2025).Avoid with kidney disorders / serious kidney disease. It’s not recommended if you have kidney disease (EMA/HMPC, 2023; Health Canada, 2025).Adults only (for medicinal use). Use in under-18s is not recommended due to lack of data (EMA/HMPC, 2023).Hydration matters. If you’re using it for urinary “flushing,” you need adequate fluid intake (EMA/HMPC, 2023).Stop and seek help if symptoms look serious. Fever, painful urination, cramps/spasms, or blood in urine = talk to a clinician (EMA/HMPC, 2023).Duration caution. If using it beyond a few weeks, talk to a health professional (Health Canada, 2025).If breastfeeding: ask a health professional first (EMA/HMPC, 2023; Health Canada, 2025).
Duke (2002) rates juniper as + (use with caution), noting diuretic, carminative, and aquaretic activities, primarily at the experimental level (score 1). Traditional use for urinary infections is not supported by strong clinical evidence. The essential oil contains potentially nephrotoxic terpinen-4-ol, and juniper is contraindicated in kidney disease, urinary infections with inflammation, and pregnancy (emmenagogue and potential abortifacient properties). Commission E and PhEur do not recommend medicinal doses for prolonged use exceeding 4–6 weeks (Duke, 2002).
External Ids
Botanical Description
Slender, softly hairy perennial herb with narrow, lance-shaped leaves and small, four-petalled, pale pink to lilac flowers with a notched tip, borne singly in the upper leaf axils. After flowering, long, narrow seed pods split to release cottony-tufted seeds, typical of the willowherb genus.[13]
Evergreen coniferous shrub or small tree, often low and sprawling, with sharp, needle-like leaves in whorls of three, each bearing a single white band on the upper surface. The plant is dioecious; female plants bear small, round, fleshy, berry-like cones ('juniper berries') that take two to three years to ripen from green to blue-black.[1]
Habitat
Grows in damp meadows, ditches, streamsides and waste ground on moist soils; native to Europe and temperate Asia.[13]
Grows on heath, moorland, rocky hillsides and open coniferous woodland on poor, often calcareous soils; one of the most widely distributed conifers, native across the Northern Hemisphere from Europe and Asia to North America.
Harvesting
The flowering aerial parts are cut in summer while in flower, and dried in a warm, shaded, airy place.[13]
The ripe, blue-black berry-like cones are hand-picked in autumn, typically in their second or third year of ripening (a mix of ages is often present on the same shrub); leaves and young stems can be gathered through the growing season.
Traditional Uses
Small-flowered willowherb, along with related Epilobium species, has a Central European folk tradition as a supportive remedy for lower urinary tract symptoms associated with benign prostatic hyperplasia (BPH) and prostatitis, and as an antimicrobial and anti-inflammatory herb for minor infections; the traditional prostate-support use is attributed mainly to its oenothein B content, though robust clinical evidence remains limited.[13]
Juniper berry has a long European tradition as a diuretic and urinary antiseptic for minor urinary complaints, a warming digestive carminative for indigestion and bloating, and a flavouring for gin and other spirits; the leaf and wood have also been burned or used topically for their antimicrobial properties.[1]
Preparations
Dried flowering herb infused in hot water as a traditional urinary and prostate-support tea.
Comminuted juniper cone berries infused in 150 ml boiling water, 2.0-2.5 g as a single dose 1-3 times daily per the current revision of the EU herbal monograph. Educational reference only, not a prescription.
Steam-distilled from the berries; used in small internal doses for short periods or diluted for topical/aromatic use.
Dosage
The EU herbal monograph gives 1.5-2.0 g of the comminuted herb in 250 mL of boiling water as an infusion, twice daily, in adults and elderly; long-term use is possible. Lower urinary tract or prostate symptoms should always be medically assessed first, and the monograph directs that a doctor be consulted if fever, spasms, blood in the urine, painful urination or urinary retention occur. Educational reference only, not a prescription.
The EU herbal monograph gives 2.0-2.5 g of the comminuted cone berries in 150 mL of boiling water as an infusion, 1-3 times daily (single dose 2-2.5 g, daily dose 2.5-6 g), for adults and elderly. Use is limited to short courses - if symptoms persist beyond 2 weeks a healthcare practitioner should be consulted - with adequate fluid intake; contraindicated in severe renal disease and not recommended in pregnancy. Educational reference only, not a prescription.
References
Lookalikes Review
Dangerous Lookalikes
Not documented
References & Sources
- Vitalone, A. and Allkanjari, O (2018) 'Epilobium spp: Pharmacology and Phytochemistry', Phytotherapy Research, 32(7), pp. 1229-1240. doi:10.1002/ptr.6072 Traditional / reference
https://doi.org/10.1002/ptr.6072 - Cicero, A.F.G., Allkanjari, O., Busetto, G.M., Cai, T. et al (2019) 'Nutraceutical treatment and prevention of benign prostatic hyperplasia and prostate cancer', Archivio Italiano di Urologia e Andrologia, 91(3), pp. 139-152. doi:10.4081/aiua.2019.3.139 Traditional / reference
https://doi.org/10.4081/aiua.2019.3.139 - Vlase, A.M., Toiu, A., Gligor, O., Muntean, D. et al (2024) 'Investigation of Epilobium hirsutum L. Optimized Extract's Anti-Inflammatory and Antitumor Potential', Plants (Basel), 13(2), pp. 198. doi:10.3390/plants13020198 Preclinical
https://doi.org/10.3390/plants13020198 - Granica, S., Piwowarski, J.P., Czerwinska, M.E. and Kiss, A.K (2014) 'Phytochemistry, pharmacology and traditional uses of different Epilobium species (Onagraceae): a review', Journal of Ethnopharmacology, pp. 316--346. doi:10.1016/j.jep.2014.08.036 Traditional / reference
https://doi.org/10.1016/j.jep.2014.08.036 - Ramstead, A.G., Schepetkin, I.A., Quinn, M.T. and Jutila, M.A (2012) 'Oenothein B, a cyclic dimeric ellagitannin isolated from Epilobium angustifolium, enhances IFN-gamma production by lymphocytes', PLoS One, 7(11), pp. e50546. doi:10.1371/journal.pone.0050546 Preclinical
https://doi.org/10.1371/journal.pone.0050546 - Kiss, A.K., Bazylko, A., Filipek, A., Granica, S., Jaszewska, E., Kiarszys, U., Kosmider, A. and Piwowarski, J (2011) 'Oenothein B's contribution to the anti-inflammatory and antioxidant activity of Epilobium sp', Phytomedicine, 18(7), pp. 557-560. doi:10.1016/j.phymed.2010.10.016 Preclinical
https://doi.org/10.1016/j.phymed.2010.10.016 - Schepetkin, I.A., Kirpotina, L.N., Jakiw, L., Khlebnikov, A.I., Blaskovich, C.L., Jutila, M.A. and Quinn, M.T (2009) 'Immunomodulatory activity of oenothein B isolated from Epilobium angustifolium', Journal of Immunology, 183(10), pp. 6754-6766. doi:10.4049/jimmunol.0901827 Preclinical
https://doi.org/10.4049/jimmunol.0901827 - Ducrey, B., Marston, A., Gohring, S., Hartmann, R.W. and Hostettmann, K (1997) 'Inhibition of 5-alpha-reductase and aromatase by the ellagitannins oenothein A and oenothein B from Epilobium species', Planta Medica, 63(2), pp. 111-114. doi:10.1055/s-2006-957624 Preclinical
https://doi.org/10.1055/s-2006-957624 - Schepetkin, I.A., Ramstead, A.G., Kirpotina, L.N., Voyich, J.M., Jutila, M.A. and Quinn, M.T (2016) 'Therapeutic potential of polyphenols from Epilobium angustifolium (fireweed)', Phytotherapy Research, 30(8), pp. 1287-1297. doi:10.1002/ptr.5648 Meta-analysis / review
https://doi.org/10.1002/ptr.5648 - Merighi, S., Travagli, A., Tedeschi, P., Marchetti, N. and Gessi, S (2021) 'Antioxidant and anti-inflammatory effects of Epilobium parviflorum, Melilotus officinalis and Cardiospermum halicacabum plant extracts in macrophage and microglial cells', Cells, 10(10), pp. 2691. doi:10.3390/cells10102691 Preclinical
https://doi.org/10.3390/cells10102691 - Hevesi Toth, B., Blazics, B. and Kery, A (2009) 'Polyphenol composition and antioxidant capacity of Epilobium species', Journal of Pharmaceutical and Biomedical Analysis, 49(1), pp. 26-31. doi:10.1016/j.jpba.2008.09.047 Preclinical
https://doi.org/10.1016/j.jpba.2008.09.047 - Vitalone, A., McColl, J., Thome, D., Costa, L.G. and Tita, B (2003) 'Characterization of the effect of Epilobium extracts on human cell proliferation', Pharmacology, 69(2), pp. 79-87. doi:10.1159/000072360 Preclinical
https://doi.org/10.1159/000072360 - Steenkamp, V., Gouws, M.C., Gulumian, M., Elgorashi, E.E. and van Staden, J (2005) 'Studies on antibacterial, anti-inflammatory and antioxidant activity of herbal remedies used in the treatment of benign prostatic hyperplasia and prostatitis', Journal of Ethnopharmacology, pp. 2005. doi:10.1016/j.jep.2005.07.007 Traditional / reference
https://doi.org/10.1016/j.jep.2005.07.007 - European Medicines Agency (HMPC) (2015) 'European Union herbal monograph on Epilobium angustifolium L. and/or Epilobium parviflorum Schreb., herba'. Available at: https://www.ema.europa.eu/en/documents/herbal-monograph/final-european-union-herbal-monograph-epilobium-angustifolium-l-andor-epilobium-parviflorum-schreb-herba_en.pdf Traditional / reference
https://www.ema.europa.eu/en/documents/herbal-monograph/final-european-union-herbal-monograph-epilobium-angustifolium-l-andor-epilobium-parviflorum-schreb-herba_en.pdf - Coulson, S., Rao, A., Beck, S.L., Steels, E., Gramotnev, H. and Vitetta, L (2013) 'A phase II randomised double-blind placebo-controlled clinical trial investigating the efficacy and safety of ProstateEZE Max: a herbal medicine preparation (containing Epilobium parviflorum) for the management of symptoms of benign prostatic hypertrophy', Complementary Therapies in Medicine. doi:10.1016/j.ctim.2013.01.007 Randomized trial
https://doi.org/10.1016/j.ctim.2013.01.007
- Pepeljnjak, S., Kosalec, I., Kalodera, Z. and Blazević, N (2005) 'Antimicrobial activity of juniper berry essential oil (Juniperus communis L., Cupressaceae)', Acta Pharmaceutica, 55(4), pp. 417-422. Available at: https://pubmed.ncbi.nlm.nih.gov/16375831/ Preclinical
https://pubmed.ncbi.nlm.nih.gov/16375831/ - Peruč, D., Tićac, B., Broznić, D., Maglica, Ž. et al (2020) 'Juniperus communis essential oil limits the biofilm formation of Mycobacterium avium and Mycobacterium intracellulare on polystyrene in a temperature-dependent manner', International Journal of Environmental Health Research, 32(1), pp. 141-154. doi:10.1080/09603123.2020.1741519 Preclinical
https://doi.org/10.1080/09603123.2020.1741519 - Marković, T., Popović, S., Matić, S., Mitrović, M. et al (2024) 'Insights into Molecular Mechanisms of Anticancer Activity of Juniperus communis Essential Oil in HeLa and HCT 116 Cells', Plants (Basel), 13(17), pp. 2351. doi:10.3390/plants13172351 Preclinical
https://doi.org/10.3390/plants13172351 - Goncalves, A.C., Flores-Felix, J.D., Coutinho, P., Alves, G. and Silva, L.R (2022) 'Zimbro (Juniperus communis L.) as a Promising Source of Bioactive Compounds and Biomedical Activities: A Review on Recent Trends', International Journal of Molecular Sciences, 23(6), pp. 3197. doi:10.3390/ijms23063197 Meta-analysis / review
https://doi.org/10.3390/ijms23063197 - Bais, S., Gill, N.S., Rana, N. and Shandil, S (2014) 'A Phytopharmacological Review on a Medicinal Plant: Juniperus communis', International Scholarly Research Notices, 2014, pp. 634723. doi:10.1155/2014/634723 Meta-analysis / review
https://doi.org/10.1155/2014/634723 - Raina, R., Verma, P.K., Peshin, R. and Kour, H (2019) 'Potential of Juniperus communis L as a nutraceutical in human and veterinary medicine', Heliyon, 5(8), pp. e02376. doi:10.1016/j.heliyon.2019.e02376 Meta-analysis / review
https://doi.org/10.1016/j.heliyon.2019.e02376 - Gordien, A.Y., Gray, A.I., Franzblau, S.G. and Seidel, V (2009) 'Antimycobacterial terpenoids from Juniperus communis L. (Cuppressaceae)', Journal of Ethnopharmacology, 126(3), pp. 500-505. doi:10.1016/j.jep.2009.09.007 Preclinical
https://doi.org/10.1016/j.jep.2009.09.007 - Klancnik, A., Zorko, S., Toplak, N., Kovac, M., Bucar, F., Jersek, B. and Smole Mozina, S (2017) 'Antiadhesion activity of juniper (Juniperus communis L.) preparations against Campylobacter jejuni evaluated with PCR-based methods', Phytotherapy Research, 32(3), pp. 542-550. doi:10.1002/ptr.6005 Preclinical
https://doi.org/10.1002/ptr.6005 - Maurya, A.K., Devi, R., Kumar, A., Koundal, R., Thakur, S., Sharma, A., Kumar, D., Kumar, R., Padwad, Y.S., Chand, G., Singh, B. and Agnihotri, V.K (2018) 'Chemical Composition, Cytotoxic and Antibacterial Activities of Essential Oils of Cultivated Clones of Juniperus communis and Wild Juniperus Species', Chemistry & Biodiversity, 15(9), pp. e1800183. doi:10.1002/cbdv.201800183 Preclinical
https://doi.org/10.1002/cbdv.201800183 - Jegal, J., Park, S., Chung, K., Chung, H.Y., Lee, J., Jeong, E.J., Kim, K.H. and Yang, M.H (2016) 'Tyrosinase inhibitory flavonoid from Juniperus communis fruits', Bioscience, Biotechnology, and Biochemistry, 80(12), pp. 2311-2317. doi:10.1080/09168451.2016.1217146 Preclinical
https://doi.org/10.1080/09168451.2016.1217146 - Lin, T., Lu, C., Chang, K. and Lee, C (2022) 'Juniperus communis extract ameliorates lipopolysaccharide-induced acute kidney injury through the adenosine monophosphate-activated protein kinase pathway', Food Science & Nutrition, 10(10), pp. 3405-3414. doi:10.1002/fsn3.2941 Preclinical
https://doi.org/10.1002/fsn3.2941 - Gao, H., Huang, X., Yang, T., Chang, K., Yeh, L., Hsieh, M., Weng, J. and Tsai, N (2019) 'Juniperus communis Suppresses Melanoma Tumorigenesis by Inhibiting Tumor Growth and Inducing Apoptosis', The American Journal of Chinese Medicine, 47(5), pp. 1171-1191. doi:10.1142/S0192415X19500605 Preclinical
https://doi.org/10.1142/S0192415X19500605 - Huang, N., Huang, R., Huang, X., Chang, K., Lee, C., Hsiao, C., Lee, S. and Tsai, N (2021) 'Evaluation of anticancer effects of Juniperus communis extract on hepatocellular carcinoma cells in vitro and in vivo', Bioscience Reports, 41(7), pp. BSR20211143. doi:10.1042/BSR20211143 Preclinical
https://doi.org/10.1042/BSR20211143 - Lai, W., Lee, S., Chang, K., Huang, X., Li, C., Lee, C., Wu, C., Hsu, H. and Tsai, N (2021) 'Juniperus communis extract induces cell cycle arrest and apoptosis of colorectal adenocarcinoma in vitro and in vivo', Brazilian Journal of Medical and Biological Research, 54(10), pp. e10891. doi:10.1590/1414-431X2020e10891 Preclinical
https://doi.org/10.1590/1414-431X2020e10891 - Peruc, D., Ticac, B., Abram, M., Broznic, D., Stifter, S., Staver, M.M. and Gobin, I (2019) 'Synergistic potential of Juniperus communis and Helichrysum italicum essential oils against nontuberculous mycobacteria', Journal of Medical Microbiology, 68(5), pp. 703-710. doi:10.1099/jmm.0.000962 Preclinical
https://doi.org/10.1099/jmm.0.000962 - European Medicines Agency (HMPC) (2023) 'European Union herbal monograph on Juniperus communis L., galbulus (pseudo-fructus), Revision 1'. Available at: https://www.ema.europa.eu/en/documents/herbal-monograph/final-european-union-herbal-monograph-juniperus-communis-l-pseudo-fructus-galbulus-revision-1_en.pdf Traditional / reference
https://www.ema.europa.eu/en/documents/herbal-monograph/final-european-union-herbal-monograph-juniperus-communis-l-pseudo-fructus-galbulus-revision-1_en.pdf - European Medicines Agency (2010) 'European Union herbal monograph on Juniperus communis L., pseudo-fructus'. Traditional / reference
https://scholar.google.com/scholar?q=European%20Union%20herbal%20monograph%20on%20Juniperus%20communis%20L.%2C%20pseudo-fructus - British Herbal Medicine Association (1983) 'British Herbal Pharmacopoeia'. Traditional / reference
https://scholar.google.com/scholar?q=British%20Herbal%20Pharmacopoeia - Royal Botanic Gardens, Kew (n.d.). Available at: https://powo.science.kew.org Traditional / reference
https://powo.science.kew.org - Duke, J.A (2002) 'Handbook of Medicinal Herbs, Second Edition'. Traditional / reference
https://scholar.google.com/scholar?q=Handbook%20of%20Medicinal%20Herbs%2C%20Second%20Edition - Four Season Foraging (2025) 'Is Juniper Toxic?'. Available at: https://www.fourseasonforaging.com/blog/2025/4/17/is-juniper-toxic Traditional / reference
https://www.fourseasonforaging.com/blog/2025/4/17/is-juniper-toxic - Zheljazkov, V.D. and Cantrell, C.L. and Semerdjieva, I. and Radoukova, T. and Stoyanova, A. and Maneva, V. and Kacaniova, M. and Astatkie, T. and Borisova, D. and Dincheva, I. and Salamon, I (2021) 'Essential Oil Composition and Bioactivity of Two Juniper Species from Bulgaria and Slovakia', Molecules, 26(12), pp. 3659. doi:10.3390/molecules26123659 Preclinical
https://doi.org/10.3390/molecules26123659
Generated automatically from the Omnia Sana plant database and its cited sources. For educational purposes only — not medical advice. Always consult a qualified practitioner before using medicinal plants.