We use essential cookies (authentication, your saved goals/stack) by default. With your permission we’ll also enable privacy-respecting analytics (Vercel Web Analytics, anonymous load-time metrics) and error-replay diagnostics (Sentry — DOM snapshots only when an error fires) so we can fix bugs faster. Learn more about cookies
Gte7.5
Green Tea Extract Research
Likely helps
297 peer-reviewed studies
What the evidence says
Likely helps
Green Tea Extract appears to help in 7 of 7 studies with measurable effects — the evidence leans clearly favourable.
Most evidence is from high-quality meta-analyses and randomised trials published 1997–2026 with a typical study size of 469 participants.
Based on 297 studies · 63 meta-analyses · 177 RCTs · 75,210 total participants
Confidence
High confidence
What the studies found
7helped· 290 more without graded effect data
By outcome
Therapeutic & clinical
Likely helps114 studies
Weight managementModest fat oxidation and thermogenesis · 4-12 weeks
Mostly mechanism / observational48 studies
Heart & blood pressureCatechins improve lipid profiles and endothelial function · 8-12 weeks
InflammationIncreased fat oxidation and metabolic rate · 4-8 weeks
Mostly mechanism / observational9 studies
Liver health
Mostly mechanism / observational7 studies
Safety profile
Mostly mechanism / observational7 studies
Depression & mood
Too few graded studies2 studies
Longevity & agingAntioxidant protection and cardiovascular support · Ongoing
Too few graded studies2 studies
Immune support
Too few graded studies1 study
By the numbers
Pulled from 42 studies with measurable effects
Likely real effects
88%
across studies
People studied
75k
typical study: 469 people
Strongest designs
240
63 pooled, 177 randomised
Showed benefit
100%
7/7 studies
How long studies ran
1–3 months
4
3+ months
1
Populations Studied
General population3
Adults2
Diverse populations1
Adults with obesity markers1
Active research area
97 studies in the last 5 years · Latest meta-analysis: 2026
199720112026
1Office blood pressure reductionMeta-Analysisn=5,205 · very large study2025
In plain English: Flavan-3-ol-rich foods considerably reduce elevated BP and improve endothelial function independent of blood pressure supporting their use for cardiovascular prevention.
Lagou V et al. · European journal of preventive cardiology (2025)
Noticeable benefit
← WorseNo effectBetter →
Flavan-3-ol interventions included epicatechin, epigallocatechin-gallate, cocoa products, tea, grape extract, and apples delivering 586 mg (95% CI 510, 662) total flavan-3-ols.
Interventions decreased office (-2.8 [95% CI -3.9, -1.7]/-2.0 [-2.6, -1.3] mmHg) and 24 h-ambulatory BP (-3.7 [-5.8, -1.6]/-2.6 [-4.5, -0.8] mmHg) after chronic repetitive consumption.
Flow-mediated dilation increased after acute (+2.0% [1.6, 2.3]) and repetitive (+1.7% [1.3, 2.2]) consumption independent of BP.
5Influenza preventionMeta-Analysisn=5,048 · very large study2021
In plain English: To confirm the findings before implementation, longitudinal clinical trials with specific doses of green tea consumption are warranted.
Rawangkan A et al. · Molecules (Basel, Switzerland) (2021)
Large benefit
← WorseNo effectBetter →
Likely real
Similarly, in three cohort studies with 2,223 participants treated with GTCs, there were also statistically significant effects (RR 0.52, 95%CIs 0.35-0.77, P = 0.001) with very low evidence of heterogeneity (I2 = 3%, P = 0.358).
Additionally, the overall effect in the subgroup analysis of gargling and orally ingested items (taking capsules and drinking) showed a pooled RR of 0.62 (95% CIs 0.49-0.77, P = 0.003) without heterogeneity (I2= 0%, P = 0.554).
There were no obvious publication biases (Egger's test (P = 0.138) and Begg's test (P = 0.103)).
6Preeclampsia managementMeta-Analysisn=349 · medium study2025
In plain English: ECGC and resveratrol supplements have been investigated for potential effects in managing clinical signs and symptoms of preeclampsia; however, evidence on the clinical and adverse effects of polyphenols is limited and uncertain.
Nguyen PY et al. · BJOG : an international journal of obstetrics and gynaecology (2025)
ECGC and resveratrol supplements have been investigated for potential effects in managing clinical signs and symptoms of preeclampsia; however, evidence on the clinical and adverse effects of polyphenols is limited and uncertain.
In plain English: Both in vitro and in vivo studies have demonstrated that the possible anticancer mechanisms are the inhibition on proliferation, anti-angiogenesis, induction of apoptosis, suppression on metastasis, inhibition on cancer stem cells, and modulation on gut microbiota.
Xu XY et al. · Critical Reviews in Food Science and Nutrition (2020)
Epidemiological studies have shown that the consumption of tea is inversely associated with the risk of several cancers.
The anticancer actions of tea are mainly attributed to tea polyphenols, such as epigallocatechin-3-gallate and theaflavins.
Clinical trials have elucidated that intervention of tea phytochemicals is effective in the prevention of several cancers.