Plant Comparison
Tea vs Blue gum eucalyptus
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
Tea and Blue gum eucalyptus: they share 5 indicated uses (arthritis / joint pain, infection (general), inflammation (general), …); 3 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Tea | Blue gum eucalyptus | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 1/10 | 2/10 | Comparable evidence |
| Infection (general) | 1/10 | 2/10 | Comparable evidence |
| Inflammation (general) | 1/10 | 2/10 | Comparable evidence |
| Skin irritation | 1/10 | 2/10 | Comparable evidence |
| Wounds | 1/10 | 2/10 | 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
Principal antioxidant polyphenols, most concentrated in minimally oxidised green tea; epigallocatechin gallate (EGCG) is the best studied.
Caffeine gives tea its mild stimulant effect; L-theanine, a unique amino acid, is associated with calm alertness and modulates caffeine's effects.
Oxidative polymerisation products of catechins formed during black tea processing, contributing to black tea's colour and its own antioxidant profile.
Leaf essential oil dominated by 1,8-cineole (eucalyptol, typically 70%+), the principal compound responsible for the plant's antimicrobial, anti-inflammatory and expectorant/decongestant activity.
Pharmacological Actions
Traditional & Indicated Uses
inferred from anti-inflammatory action
inferred from antidiabetic action
inferred from anticancer action
inferred from neuroprotective action
inferred from antimicrobial action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
inferred from immunomodulator action
inferred from antifungal action
inferred from anti-inflammatory action
inferred from anti-inflammatory action
Safety, Cautions & Contraindications
Generally safe in moderate consumption. High caffeine intake may cause insomnia, anxiety, palpitations, or dependence. Large amounts of green tea extract supplements may be hepatotoxic (rare). May reduce iron absorption if consumed with meals. Avoid very high supplement doses during pregnancy.
Duke (2002) rates tea (Camellia sinensis) as ++ and notes anti-aggregant, antioxidant, anticariogenic, and antibacterial activities at the experimental level (score 1). The catechins (EGCG, ECG) and polyphenols are responsible for the antioxidant and anticancer properties under research investigation. Duke notes that green tea preserves more polyphenols than black tea due to less oxidation. Regular tea consumption is associated with reduced cardiovascular risk. Excess consumption (>10 cups daily) may cause fluoride-related bone changes. Caffeine content is relevant for sleep disturbance, anxiety, and interactions with cardiovascular medications (Duke, 2002).
Eucalyptus globulus essential oil is highly concentrated and rich in the monoterpene 1,8-cineole; it should never be applied undiluted to the skin or ingested outside of standardized pharmaceutical preparations. Improper use can cause irritation, nausea, dizziness, or neurological symptoms, and inhalation at high concentrations may provoke respiratory distress, particularly in infants, young children, or individuals with asthma or other airway sensitivities. For this reason, essential oil use is generally discouraged in children and during pregnancy unless under professional guidance. Preparations such as leaf-infused oils or external applications using whole plant material are considerably milder, but they should still be used with care and an understanding that different preparation methods carry different levels of risk.
Duke (2002) provides clinical evidence (score 2) for eucalyptus as an expectorant and topical hyperemic (rubefacient), consistent with Commission E approval. Clinical evidence also supports its use in asthma, bronchitis, and catarrh. The essential oil (primarily 1,8-cineole) is the active constituent. Therapeutic use as steam inhalation is well-established. Internal use of the essential oil at high doses is contraindicated due to toxicity; even small amounts (3.5 ml) can be fatal in children. Contraindicated for inflammatory diseases of the gastrointestinal tract or bile ducts (Duke, 2002).
External Ids
Botanical Description
Evergreen shrub or small tree with glossy, dark green, leathery, finely toothed leaves. Small, fragrant, white flowers with a prominent central boss of yellow stamens are borne singly or in small clusters in the leaf axils. Commercial tea is made from the young leaves and unopened leaf buds ('sprouts'), processed differently to yield green, black, white or oolong tea from the same species.[15]
Large, fast-growing evergreen tree with distinctive two-stage leaves: rounded, silvery-blue juvenile leaves borne in opposite pairs, giving way to narrow, sickle-shaped, aromatic, dark green mature leaves as the tree ages. Small, cream-white, fluffy flowers with numerous stamens are borne singly or in small clusters, followed by a woody, cup-shaped seed capsule ('gum nut').[12]
Habitat
Native to the subtropical and tropical forests and hillsides of East and South Asia (China, India, Myanmar); cultivated extensively across Asia, Africa and elsewhere on well-drained, acidic upland soils.[15]
Native to south-eastern Australia and Tasmania; widely planted worldwide in warm-temperate and Mediterranean climates for timber, essential oil production and as an ornamental/windbreak tree.
Harvesting
The youngest leaves and unopened leaf buds ('flush') are hand- or machine-picked repeatedly through the growing season; how the fresh leaf is subsequently processed (withered, rolled, oxidised, fixed and dried) determines whether it becomes green, black, white or oolong tea.[15]
Mature leaves are picked or pruned year-round and used fresh, dried, or steam-distilled for essential oil, which is the main commercial and medicinal form.
Traditional Uses
Eucalyptus leaf has a long Australian Aboriginal and, after global spread, worldwide tradition as a respiratory remedy - inhaled as steam or applied as chest rubs for colds, coughs, bronchitis and catarrh - and as a topical antiseptic and rubefacient for minor wounds and muscular aches.[12]
Preparations
Young leaf, minimally oxidised, infused in hot water; the least-processed and most-studied form for antioxidant polyphenol content.
Concentrated leaf extract standardised to catechin (e.g. EGCG) content, taken as capsules; used in some clinical studies, though high-dose extracts carry rare hepatotoxicity concerns.
A few drops of essential oil, or fresh/dried leaf, added to hot water and the vapour inhaled for respiratory congestion; the classic and best-established use.
Diluted essential oil in a carrier oil or standardised ointment applied to the chest and back for coughs and colds.
Comminuted dried leaf infused in 150 ml boiling water, 1.5-3 g up to four times daily (daily dose 4.5-12 g) for oral use per the EU herbal monograph. Educational reference only, not a prescription.
Dosage
The EU herbal monograph on green tea leaf (Camelliae sinensis non fermentatum folium) gives, for adults and elderly, 1.8-2.2 g of the whole or comminuted leaf in 100-150 mL of boiling water as an infusion, 3-5 times daily; a powdered herbal substance at 390 mg three times daily (up to 5 if necessary) is also listed. Contraindicated in gastric and duodenal ulcers, cardiovascular disorders such as hypertension and arrhythmia, and hyperthyroidism. Not recommended under 18 years. Educational reference only, not a prescription.
The EU herbal monograph on eucalyptus LEAF gives, for inhalation, 3 g of the comminuted leaf in boiling water up to 3 times daily (daily dose 3-9 g), and for oral use 1.5-3 g in 150 mL as an infusion up to 4 times daily (daily dose 4.5-12 g), in adolescents, adults and elderly. Use is CONTRAINDICATED in children under 30 months, and not recommended under 12 years. The essential oil is a separate herbal substance with its own monograph and its own posology - it is never taken internally or applied undiluted to skin on the strength of these leaf figures. Educational reference only, not a prescription.
References
Drug Class Interactions
Not documented
Lookalikes Review
References & Sources
- Mancini, E., Beglinger, C., Drewe, J., Zanchi, D. et al (2017) 'Green tea effects on cognition, mood and human brain function: A systematic review', Phytomedicine, 34, pp. 26-37. doi:10.1016/j.phymed.2017.07.008 Meta-analysis / review
https://doi.org/10.1016/j.phymed.2017.07.008 - Musial, C., Kuban-Jankowska, A. and Gorska-Ponikowska, M (2020) 'Beneficial Properties of Green Tea Catechins', International Journal of Molecular Sciences, 21(5), pp. 1744. doi:10.3390/ijms21051744 Traditional / reference
https://doi.org/10.3390/ijms21051744 - Ohishi, T., Goto, S., Monira, P., Isemura, M. and Nakamura, Y (2016) 'Anti-inflammatory Action of Green Tea', Anti-inflammatory & Anti-allergy Agents in Medicinal Chemistry, 15(2), pp. 74-90. doi:10.2174/1871523015666160915154443 Traditional / reference
https://doi.org/10.2174/1871523015666160915154443 - Zhao, T., Li, C., Wang, S. and Song, X (2022) 'Green Tea (Camellia sinensis): A Review of Its Phytochemistry, Pharmacology, and Toxicology', Molecules, 27(12), pp. 3909. doi:10.3390/molecules27123909 Meta-analysis / review
https://doi.org/10.3390/molecules27123909 - Filippini, T., Malavolti, M., Borrelli, F., Izzo, A.A., Fairweather-Tait, S.J., Horneber, M. and Vinceti, M (2020) 'Green tea (Camellia sinensis) for the prevention of cancer', Cochrane Database of Systematic Reviews, 3(3), pp. CD005004. doi:10.1002/14651858.CD005004.pub3 Meta-analysis / review
https://doi.org/10.1002/14651858.CD005004.pub3 - Prasanth, M.I., Sivamaruthi, B.S., Chaiyasut, C. and Tencomnao, T (2019) 'A Review of the Role of Green Tea (Camellia sinensis) in Antiphotoaging, Stress Resistance, Neuroprotection, and Autophagy', Nutrients, 11(2), pp. 474. doi:10.3390/nu11020474 Meta-analysis / review
https://doi.org/10.3390/nu11020474 - Bedrood, Z., Rameshrad, M. and Hosseinzadeh, H (2018) 'Toxicological effects of Camellia sinensis (green tea): A review', Phytotherapy Research, 32(7), pp. 1163-1180. doi:10.1002/ptr.6063 Meta-analysis / review
https://doi.org/10.1002/ptr.6063 - Hamilton-Miller, J.M.T (2001) 'Anti-cariogenic properties of tea (Camellia sinensis)', Journal of Medical Microbiology, 50(4), pp. 299-302. doi:10.1099/0022-1317-50-4-299 Meta-analysis / review
https://doi.org/10.1099/0022-1317-50-4-299 - Conde, V.R., Alves, M.G., Oliveira, P.F. and Silva, B.M (2015) 'Tea (Camellia sinensis (L.)): a putative anticancer agent in bladder carcinoma?', Anti-Cancer Agents in Medicinal Chemistry, 15(1), pp. 26-36. doi:10.2174/1566524014666141203143143 Meta-analysis / review
https://doi.org/10.2174/1566524014666141203143143 - Moore, R.J., Jackson, K.G. and Minihane, A.M (2009) 'Green tea (Camellia sinensis) catechins and vascular function', British Journal of Nutrition, 102(12), pp. 1790-1802. doi:10.1017/S0007114509991218 Meta-analysis / review
https://doi.org/10.1017/S0007114509991218 - Gaur, R. and Bao, G.H (2021) 'Chemistry and Pharmacology of Natural Catechins from Camellia sinensis as Anti-MRSA Agents', Current Topics in Medicinal Chemistry, 21(17), pp. 1519-1537. doi:10.2174/1568026621666210524100632 Meta-analysis / review
https://doi.org/10.2174/1568026621666210524100632 - Tafazoli, A. and Tafazoli Moghadam, E (2020) 'Camellia Sinensis Mouthwashes in Oral Care: a Systematic Review', Journal of Dentistry (Shiraz), 21(4), pp. 249-262. doi:10.30476/DENTJODS.2020.83204.1045 Meta-analysis / review
https://doi.org/10.30476/DENTJODS.2020.83204.1045 - Albassam, A.A. and Markowitz, J.S (2017) 'An Appraisal of Drug-Drug Interactions with Green Tea (Camellia sinensis)', Planta Medica, 83(6), pp. 496-508. doi:10.1055/s-0043-100934 Meta-analysis / review
https://doi.org/10.1055/s-0043-100934 - Gramza-Michalowska, A (2014) 'Caffeine in tea Camellia sinensis - content, absorption, benefits and risks of consumption', Journal of Nutrition, Health & Aging, 18(2), pp. 143-149. doi:10.1007/s12603-013-0404-1 Meta-analysis / review
https://doi.org/10.1007/s12603-013-0404-1 - Chacko, S.M. et al (2010) 'Beneficial effects of green tea: a literature review'. Traditional / reference
https://scholar.google.com/scholar?q=Beneficial%20effects%20of%20green%20tea%3A%20a%20literature%20review - European Medicines Agency (HMPC) (2013) 'Community herbal monograph on Camellia sinensis (L.) Kuntze, non fermentatum folium'. Available at: https://www.ema.europa.eu/en/documents/herbal-monograph/final-community-herbal-monograph-camellia-sinensis-l-kuntze-non-fermentatum-folium_en.pdf Traditional / reference
https://www.ema.europa.eu/en/documents/herbal-monograph/final-community-herbal-monograph-camellia-sinensis-l-kuntze-non-fermentatum-folium_en.pdf - Drake, V.J (2015) 'Tea catechins and cardiovascular disease risk', 74(1), pp. 39--46. Traditional / reference
https://scholar.google.com/scholar?q=Tea%20catechins%20and%20cardiovascular%20disease%20risk - Nobre, A.C., Rao, A. and Owen, G.N (2008) 'L-theanine, a natural constituent in tea, and its effect on mental state', pp. 167--168. Traditional / reference
https://scholar.google.com/scholar?q=L-theanine%2C%20a%20natural%20constituent%20in%20tea%2C%20and%20its%20effect%20on%20mental%20state - 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 - Misaka, S., Yatabe, J., Muller, F., Takano, K., Kawabe, K., Glaeser, H., Yatabe, M.S., Onoue, S., Werba, J.P., Watanabe, H., Yamada, S., Fromm, M.F. and Kimura, J (2014) 'Green tea ingestion greatly reduces plasma concentrations of nadolol in healthy subjects', Clinical Pharmacology and Therapeutics, 95(4), pp. 432-438. doi:10.1038/clpt.2013.241 Randomized trial
https://doi.org/10.1038/clpt.2013.241 - Werba, J.P., Misaka, S., Giroli, M.G., Shimomura, K., Amato, M., Simonelli, N., Vigo, L. and Tremoli, E (2018) 'Update of green tea interactions with cardiovascular drugs and putative mechanisms', Journal of Food and Drug Analysis, 26(2S), pp. S72-S77. doi:10.1016/j.jfda.2018.01.008 Meta-analysis / review
https://doi.org/10.1016/j.jfda.2018.01.008
- Čmiková, N., Galovičová, L., Schwarzová, M., Vukic, M.D. et al (2023) 'Chemical Composition and Biological Activities of Eucalyptus globulus Essential Oil', Plants (Basel), 12(5), pp. 1076. doi:10.3390/plants12051076 Preclinical
https://doi.org/10.3390/plants12051076 - Elangovan, S. and Mudgil, P (2023) 'Antibacterial Properties of Eucalyptus globulus Essential Oil against MRSA: A Systematic Review', Antibiotics (Basel), 12(3), pp. 474. doi:10.3390/antibiotics12030474 Meta-analysis / review
https://doi.org/10.3390/antibiotics12030474 - Zonfrillo, M., Andreola, F., Krasnowska, E.K., Sferrazza, G. et al (2022) 'Essential Oil from Eucalyptus globulus (Labill.) Activates Complement Receptor-Mediated Phagocytosis and Stimulates Podosome Formation in Human Monocyte-Derived Macrophages', Molecules, 27(11), pp. 3488. doi:10.3390/molecules27113488 Preclinical
https://doi.org/10.3390/molecules27113488 - Arooj, B., Asghar, S., Saleem, M., Khalid, S.H., Asif, M., Chohan, T., Khan, I.U., Zubair, H.M. and Yaseen, H.S (2023) 'Anti-inflammatory mechanisms of eucalyptol rich Eucalyptus globulus essential oil alone and in combination with flurbiprofen', Inflammopharmacology, 31(4), pp. 1849-1862. doi:10.1007/s10787-023-01237-6 Preclinical
https://doi.org/10.1007/s10787-023-01237-6 - Assaggaf, H.M., Naceiri Mrabti, H., Rajab, B.S., Attar, A.A., Hamed, M., Sheikh, R.A., Omari, N.E., Menyiy, N.E., Belmehdi, O., Mahmud, S., Alshahrani, M.M., Park, M.N., Kim, B., Zengin, G. and Bouyahya, A (2022) 'Singular and Combined Effects of Essential Oil and Honey of Eucalyptus globulus on Anti-Inflammatory, Antioxidant, Dermatoprotective, and Antimicrobial Properties: In Vitro and In Vivo Findings', Molecules, 27(16), pp. 5121. doi:10.3390/molecules27165121 Preclinical
https://doi.org/10.3390/molecules27165121 - Mulyaningsih, S., Sporer, F., Zimmermann, S., Reichling, J. and Wink, M (2010) 'Synergistic properties of the terpenoids aromadendrene and 1,8-cineole from the essential oil of Eucalyptus globulus against antibiotic-susceptible and antibiotic-resistant pathogens', Phytomedicine, 17(13), pp. 1061-1066. doi:10.1016/j.phymed.2010.06.018 Preclinical
https://doi.org/10.1016/j.phymed.2010.06.018 - Luis, A., Neiva, D., Pereira, H., Gominho, J., Domingues, F. and Duarte, A.P (2014) 'Stumps of Eucalyptus globulus as a source of antioxidant and antimicrobial polyphenols', Molecules, 19(10), pp. 16428-16446. doi:10.3390/molecules191016428 Preclinical
https://doi.org/10.3390/molecules191016428 - Merghni, A., Noumi, E., Hadded, O., Dridi, N., Panwar, H., Ceylan, O., Mastouri, M. and Snoussi, M (2018) 'Assessment of the antibiofilm and antiquorum sensing activities of Eucalyptus globulus essential oil and its main component 1,8-cineole against methicillin-resistant Staphylococcus aureus strains', Microbial Pathogenesis, 118, pp. 74-80. doi:10.1016/j.micpath.2018.03.006 Preclinical
https://doi.org/10.1016/j.micpath.2018.03.006 - Mousa, A.A., Elweza, A.E., Elbaz, H.T., Tahoun, E.A.E., Shoghy, K.M., Elsayed, I. and Hassan, E.B (2019) 'Eucalyptus Globulus protects against diclofenac sodium induced hepatorenal and testicular toxicity in male rats', Journal of Traditional and Complementary Medicine, 10(6), pp. 521-528. doi:10.1016/j.jtcme.2019.11.002 Preclinical
https://doi.org/10.1016/j.jtcme.2019.11.002 - Mota, V.S., Turrini, R.N.T. and Poveda, V.B (2015) 'Antimicrobial activity of Eucalyptus globulus oil, xylitol and papain: a pilot study', Revista da Escola de Enfermagem da USP, 49(2), pp. 216-220. doi:10.1590/S0080-623420150000200005 Preclinical
https://doi.org/10.1590/S0080-623420150000200005 - Nguyen, H.T.T., Miyamoto, A., Nguyen, H.T., Pham, H.T., Hoang, H.T., Tong, N.T.M., Truong, L.T.N. and Nguyen, H.T.T (2023) 'Antibacterial effects of essential oils from Cinnamomum cassia bark and Eucalyptus globulus leaves - the involvements of major constituents', PLoS One, 18(7), pp. e0288787. doi:10.1371/journal.pone.0288787 Preclinical
https://doi.org/10.1371/journal.pone.0288787 - Royal Botanic Gardens, Kew (n.d.). Available at: https://powo.science.kew.org Traditional / reference
https://powo.science.kew.org - European Medicines Agency (HMPC) (2013) 'Community herbal monograph on Eucalyptus globulus Labill., folium'. Available at: https://www.ema.europa.eu/en/documents/herbal-monograph/final-community-herbal-monograph-eucalyptus-globulus-labill-folium_en.pdf Traditional / reference
https://www.ema.europa.eu/en/documents/herbal-monograph/final-community-herbal-monograph-eucalyptus-globulus-labill-folium_en.pdf - Sadlon, A.E. and Lamson, D.W (2010) 'Immune-modifying and antimicrobial effects of Eucalyptus oil and simple inhalation devices', 15(1), pp. 33--47. Preclinical
https://scholar.google.com/scholar?q=Immune-modifying%20and%20antimicrobial%20effects%20of%20Eucalyptus%20oil%20and%20simple%20inhalation%20devices - World Health Organization (2002) 'WHO Monographs on Selected Medicinal Plants'. Traditional / reference
https://scholar.google.com/scholar?q=WHO%20Monographs%20on%20Selected%20Medicinal%20Plants - 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
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.