Omnia SanaPlant Comparison
Tea vs Olive
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 Olive: they share 9 indicated uses (arthritis / joint pain, blood sugar / diabetes support, cancer (anticancer research), …); 5 pharmacological actions in common.
Evidence face-off — shared uses
| Condition | Tea | Olive | Verdict |
|---|---|---|---|
| Arthritis / joint pain | 1/10 | 5/10 | Stronger for Olive |
| Blood sugar / diabetes support | 1/10 | 6/10 | Stronger for Olive |
| Cancer (anticancer research) | 8/10 | 2/10 | Stronger for Tea |
| Cardiovascular / heart health | 1/10 | 5/10 | Stronger for Olive |
| Infection (general) | 1/10 | 5/10 | Stronger for Olive |
| Inflammation (general) | 1/10 | 5/10 | Stronger for Olive |
| Metabolic support | 1/10 | 5/10 | Stronger for Olive |
| Skin irritation | 1/10 | 5/10 | Stronger for Olive |
| Wounds | 1/10 | 5/10 | Stronger for Olive |
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.
The principal bioactive phenolics of the leaf, responsible for most of its antioxidant, anti-inflammatory and antihypertensive activity.
Antioxidant flavonoids of the leaf.
Pentacyclic triterpenes of the leaf cuticle and fruit skin, studied for anti-inflammatory and metabolic effects.
The dominant fatty acid of the fruit oil, a key component of the Mediterranean-diet lipid profile.
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 antidiabetic action
inferred from anticancer action
inferred from antimicrobial action
inferred from anti-inflammatory action
inferred from antidiabetic 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).
Olive leaf extract may lower blood pressure; use caution if already on antihypertensive medication. May have mild hypoglycaemic effects. Olive oil is safe for dietary use. Rare olive pollen allergy. Well tolerated in normal culinary and supplement doses.
Duke (2002) includes olive leaf as ++ and notes hypotensive, hypoglycemic, ACE inhibitor-like, and antioxidant activities at the experimental level (score 1). Olive leaf extract (containing oleuropein) has demonstrated blood pressure-lowering and antiarrhythmic effects consistent with clinical support (PHR). Duke notes that traditional Mediterranean use for both the leaf and fruit is food-grade and safe. Olive leaf preparations are used as mild antihypertensives in European phytotherapy. No significant adverse effects are reported at standard herbal doses (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]
Evergreen tree (Oleaceae), typically 3-15 m tall, often gnarled and long-lived, with some specimens surviving for centuries. Leaves are narrow, leathery, lance-shaped, dark green above and silvery-grey beneath. Small, fragrant, creamy-white four-lobed flowers are borne in axillary clusters, followed by a fleshy drupe (the olive) that ripens from green to purple-black.[1]
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 the Mediterranean basin, the Near East and parts of Africa, and cultivated for millennia across Mediterranean-type climates worldwide (warm, dry summers and mild winters); tolerates poor, rocky, calcareous soils and drought.[1]
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]
Leaves can be harvested year-round from pruned or fallen branches, generally at their highest oleuropein content in late autumn and winter; fruit is hand- or machine-harvested from early autumn (green olives) through winter (fully ripe black olives), depending on the intended product.[10]
Traditional Uses
Olive leaf and fruit have a long Mediterranean tradition as a tonic, antipyretic and mild antihypertensive remedy, and olive oil is the foundation fat of the traditional Mediterranean diet, long associated with cardiovascular health. Modern research on oleuropein and other leaf polyphenols supports antioxidant, anti-inflammatory, antimicrobial, blood-pressure-lowering and insulin-sensitising effects consistent with these traditional and dietary uses.[1, 4, 7]
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.
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.
A meta-analysis of trials for blood pressure used around 500 mg/day of standardised olive leaf extract. Educational reference only, not a prescription; culinary olive oil and leaf tea are considered food-safe at normal dietary amounts.
References
Drug Class Interactions
Lookalikes Review
Pairings
Not documented
Olive leaf and black seed (Nigella sativa) can each mildly lower blood pressure, so taking them together — especially alongside blood-pressure medicines — may add up and lower blood pressure more than expected. Monitor your blood pressure.[11, 18]
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
- Omar, S.H., Kerr, P.G., Scott, C.J., Hamlin, A.S. and others (2017) 'Olive (Olea europaea L.) Biophenols: A Nutriceutical against Oxidative Stress in SH-SY5Y Cells', Molecules, 22(11), pp. 1858. doi:10.3390/molecules22111858 Preclinical
https://doi.org/10.3390/molecules22111858 - Ruzzolini, J., Peppicelli, S., Andreucci, E., Bianchini, F. and others (2018) 'Oleuropein, the Main Polyphenol of Olea europaea Leaf Extract, Has an Anti-Cancer Effect on Human BRAF Melanoma Cells and Potentiates the Cytotoxicity of Current Chemotherapies', Nutrients, 10(12), pp. 1950. doi:10.3390/nu10121950 Preclinical
https://doi.org/10.3390/nu10121950 - Al-Rimawi, F., Sbeih, M., Amayreh, M., Rahhal, B. and others (2024) 'Evaluation of the antibacterial and antifungal properties of oleuropein, Olea europaea leaf extract, and Thymus vulgaris oil', BMC Complementary Medicine and Therapies, 24(1), pp. 297. doi:10.1186/s12906-024-04596-x Preclinical
https://doi.org/10.1186/s12906-024-04596-x - Qabaha, K., Al-Rimawi, F., Qasem, A. and Naser, S.A (2018) 'Oleuropein Is Responsible for the Major Anti-Inflammatory Effects of Olive Leaf Extract', Journal of Medicinal Food, 21(3), pp. 302-305. doi:10.1089/jmf.2017.0070 Preclinical
https://doi.org/10.1089/jmf.2017.0070 - Pang, K.L., Lumintang, J.N. and Chin, K.Y (2021) 'Thyroid-Modulating Activities of Olive and Its Polyphenols: A Systematic Review', Nutrients, 13(2), pp. 529. doi:10.3390/nu13020529 Meta-analysis / review
https://doi.org/10.3390/nu13020529 - Kheirandish, F., Mosaffa, N., Tarahi, M.J. and Fallahi, S (2018) 'Olive (Olea europaea) leaf extract alters the cytokine profile of Leishmania major-infected macrophages: New insight into the underlying mechanism', Parasite Immunology, 40(4), pp. e12520. doi:10.1111/pim.12520 Preclinical
https://doi.org/10.1111/pim.12520 - de Bock, M., Derraik, J.G., Brennan, C.M., Biggs, J.B. and others (2013) 'Olive (Olea europaea L.) leaf polyphenols improve insulin sensitivity in middle-aged overweight men: a randomized, placebo-controlled, crossover trial', PLoS One, 8(3), pp. e57622. doi:10.1371/journal.pone.0057622 Randomized trial
https://doi.org/10.1371/journal.pone.0057622 - Pasban-Aliabadi, H., Esmaeili-Mahani, S., Sheibani, V., Abbasnejad, M. and others (2013) 'Inhibition of 6-hydroxydopamine-induced PC12 cell apoptosis by olive (Olea europaea L.) leaf extract is performed by its main component oleuropein', Rejuvenation Research, 16(2), pp. 134-142. doi:10.1089/rej.2012.1384 Preclinical
https://doi.org/10.1089/rej.2012.1384 - Imperatrice, M., Lasfar, A., van Kalkeren, C.A.J. and Troost, F (2024) 'Olive Leaf Extract Supplementation Improves Postmenopausal Symptoms: A Randomized, Double-Blind, Placebo-Controlled Parallel Study on Postmenopausal Women', Nutrients, 16(22), pp. 3879. doi:10.3390/nu16223879 Randomized trial
https://doi.org/10.3390/nu16223879 - de Bock, M., Thorstensen, E.B., Derraik, J.G., Henderson, H.V. and others (2013) 'Human absorption and metabolism of oleuropein and hydroxytyrosol ingested as olive (Olea europaea L.) leaf extract', Molecular Nutrition & Food Research, 57(11), pp. 2079-2085. doi:10.1002/mnfr.201200795 Preclinical
https://doi.org/10.1002/mnfr.201200795 - Ismail, M.A., Norhayati, M.N. and Mohamad, N (2021) 'Olive leaf extract effect on cardiometabolic profile among adults with prehypertension and hypertension: a systematic review and meta-analysis', PeerJ, 9, pp. e11173. doi:10.7717/peerj.11173 Meta-analysis / review
https://doi.org/10.7717/peerj.11173 - Boskov Hansen, H.C. et al (2012) 'Oleocanthal, a phenolic derived from virgin olive oil: a review of the beneficial effects on inflammatory disease', 13(9), pp. 11628--11670. doi:10.3390/ijms150712323 Traditional / reference
https://doi.org/10.3390/ijms150712323 - Wainstein, J. et al (2012) 'Olive leaf extract as a hypoglycemic agent in both human diabetic subjects and in rats', 15(7), pp. 605--610. doi:10.1089/jmf.2011.0243 Randomized trial
https://doi.org/10.1089/jmf.2011.0243 - Waterman, E. and Lockwood, B (2007) 'Active components and clinical applications of olive oil', 12(4), pp. 331--342. Preclinical
https://scholar.google.com/scholar?q=Active%20components%20and%20clinical%20applications%20of%20olive%20oil - 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 - de Bock, M., Derraik, J.G.B., Brennan, C.M., Biggs, J.B., Morgan, P.E., Hodgkinson, S.C., Hofman, P.L. and Cutfield, W.S (2013) 'Olive (Olea europaea L.) leaf polyphenols improve insulin sensitivity in middle-aged overweight men: a randomized, placebo-controlled, crossover trial', PLoS One, 8(3), pp. e57622. doi:10.1371/journal.pone.0057622 Randomized trial
https://doi.org/10.1371/journal.pone.0057622 - Willcox, M.L., Elugbaju, C., Al-Anbaki, M., Lown, M. and Graz, B (2021) 'Effectiveness of Medicinal Plants for Glycaemic Control in Type 2 Diabetes: An Overview of Meta-Analyses of Clinical Trials', Frontiers in Pharmacology, 12, pp. 777561. doi:10.3389/fphar.2021.777561 Meta-analysis / review
https://doi.org/10.3389/fphar.2021.777561 - Sahebkar, A., Soranna, D., Liu, X., Thomopoulos, C., Simental-Mendia, L.E., Derosa, G., Maffioli, P. and Parati, G (2016) 'A systematic review and meta-analysis of randomized controlled trials investigating the effects of supplementation with Nigella sativa (black seed) on blood pressure', Journal of Hypertension, 34(11), pp. 2127-2135. doi:10.1097/HJH.0000000000001049 Meta-analysis / review
https://doi.org/10.1097/HJH.0000000000001049
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.