Herb Profile
Green Tea
Botanical profile with evidence, safety, and practical fit.
Last reviewed: •3 human studies cited
A StrongUse extra caution — Liver risk at high dose extracts Details
- Evidence
- Strong Human Evidence
- Typical onset
- Varies by prep
- Safety rating
- High caution
- Best for
- Antioxidant, Metabolic, Cardiovascular, Stress resilience
- Avoid / review if
- Stimulants, Hepatotoxic Drugs
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Green Tea
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Safety & Cautions
Liver risk at high dose extracts
28%
High caution — review carefully
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- - Stimulants
- - Hepatotoxic Drugs
Safety classifications
- - Liver-Sensitive: Liver-related caution language appears in the profile.
- - Stimulant-Like Profile: Stimulant-like or activating caution language is present.
Full safety note
- - Liver risk at high dose extracts
Safety labels
- - Liver-Sensitive
- - Stimulant-Like Profile
Evidence Summary
Evidence lens
Most useful for practical interpretation when safety context also fits.
StrongStrong Human Evidence
Human clinical evidence: Present in source signals
Mechanistic / preclinical: Mechanism mapped — Oxidative Stress Modulation · Metabolic Regulation · Vascular Function Support
Research maturity: More interpretable — Long Term Human Evidence May Be Limited.
Safety boundary: Safety note available — Liver risk at high dose extracts
This profile cites 3 human studies.
How evidence grades work
Each grade reflects the strength and consistency of published human evidence — not marketing claims. Grades are based on study count, design quality, effect size, consistency, and recency.
A
Strong
Multiple RCTs, consistent direction, adequate effect size
B
Moderate
Some RCTs or consistent observational data in humans
C
Preliminary / Mixed
Animal or in-vitro only, or conflicting human data
D
Traditional / Theoretical
Traditional use only; no controlled human trials
Clinical Study Summaries (3)Cited studies informing this profile. RCTs and reviews shown first.
| Study | Type | Sample | Source |
|---|---|---|---|
Green Tea (Camellia sinensis): A Review of Its Phytochemistry, Pharmacology, and Toxicology Zhao T et al. (2022) | — | — | PubMed → |
Warfarin and food, herbal or dietary supplement interactions: A systematic review Tan CSS et al. (2021) | — | — | PubMed → |
Common Herbal Dietary Supplement-Drug Interactions Asher GN et al. (2017) | — | — | PubMed → |
Dosing & Timing
Dose guidance
300 800 mg EGCG/day
How Green Tea Works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How Green Tea Works
CompoundTarget / ReceptorMechanismEffect / Outcome
Mechanisms & Biological Pathways
Preclinical pathways
Proposed mechanisms from in vitro and animal research; these do not confirm clinical outcomes in humans.
Oxidative Stress ModulationMetabolic RegulationVascular Function SupportEndothelial Function Support
Active Compounds
Key constituents studied in Green Tea, with full pharmacology and safety profiles.
Condition guides
Compare & Sourcing
Compare side-by-side tradeoffs or verify active marker guidelines.
Review available sources for Green Tea
Independent database mapping — evaluated separately from safety and efficacy scores.
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Safety first · Harm reduction
This information is educational and not medical advice. Start low, avoid risky combinations, and consult a licensed clinician before making health decisions—especially if you use medications, have diagnosed conditions, or are pregnant/breastfeeding.
Learn how we evaluate confidence, safety, and intensity on the methodology page.
Editorial Review
Checked against primary sources, cited evidence, and contraindication language before publication. Evidence claims, safety language, and affiliate modules are reviewed independently. Not personal medical advice.
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Botanical profile context
How to interpret Green Tea
Green Tea dosage ranges, effects, drug interactions, and harm-reduction safety guide for antioxidant. Strong Human Evidence research evidence. Use this herb profile as a starting point for evidence review, not as a recommendation to start a new supplement. Botanical products can vary by plant part, extract ratio, standardization, dose, and contaminant testing, so two labels with the same common name may not behave the same way.
When reviewing Green Tea, compare the traditional-use context against the human evidence, mechanism notes, and safety cautions. Pay special attention to pregnancy, breastfeeding, liver or kidney disease, blood-pressure effects, sedation, stimulation, anticoagulant use, antidepressants, and any prescription medication overlap.
For product decisions, prefer transparent labels, named extracts, clear serving sizes, and third-party quality testing. Avoid treating a long list of possible mechanisms as proof that an herb will solve a specific condition.