Green Tea Extract

Also known as: GTE, Camellia sinensis extract, EGCG, epigallocatechin gallate, green tea catechins

Evidence under review. — Not yet rated

Plant extract with catechins (EGCG) shown to boost fat burning during exercise and reduce gum inflammation.

What it does

Green tea extract (GTE) is a concentrated form of compounds from Camellia sinensis leaves, rich in antioxidant catechins — especially EGCG. A meta-analysis of nine clinical trials found GTE...
Evidence quality

Evidence base hasn't been formally rated yet. See research below.
Clinical dose

No established dose from provided studies
Found in

310 Lemonade - Peach Pear, ALLMAX Creatine Monohydrate Powder, XS Energy + Burn Drink Blue Razz and 15 more

What the Science Says

Green tea extract (GTE) is a concentrated form of compounds from Camellia sinensis leaves, rich in antioxidant catechins — especially EGCG. A meta-analysis of nine clinical trials found GTE significantly increases fat oxidation both during and after exercise, with higher doses producing greater effects. Early clinical research also suggests it may support gum health when applied locally and shows preliminary promise for cognitive protection when combined with lifestyle interventions, though larger confirmatory trials are needed.

What It Doesn't Do

Not a proven cancer preventer — the MIRACLE trial tested it for colorectal adenoma prevention but results aren't conclusive from the provided data. Won't meaningfully improve cognition on its own — the PENSA trial missed its primary endpoint. Lab results showing it kills viruses or cancer cells don't mean it works that way in your body. No proven benefit for neonatal calves translates to humans.

Evidence-Based Benefits

Increases fat burning during and after exercise, with greater effects at higher doses.

Moderate Evidence

Effective at: Varied across 9 RCTs; dose-response relationship confirmed

Supporting studies (click to view on PubMed):

PMID 42155001

Applied as a gel, reduces gum pocket depth in periodontitis better than standard antibiotic gel.

Weak Evidence

Effective at: Topical gel formulation (concentration not specified in abstract)

Supporting studies (click to view on PubMed):

PMID 40546664

Combined with lifestyle changes, may improve cognitive scores in older adults at high Alzheimer's risk.

Weak Evidence

Effective at: EGCG 5-6 mg/kg/day for 12 months

Supporting studies (click to view on PubMed):

PMID 40664536

Adding GTE to acidic drinks reduces tooth enamel erosion in a dose-dependent way in lab models.

Weak Evidence

Effective at: 0.6-1.2% GTE concentration in beverage (in vitro only)

Supporting studies (click to view on PubMed):

PMID 41603869

Absorption & Bioavailability

Moderate — EGCG is the primary active compound; absorption varies by formulation and dose. No direct bioavailability data reported in the provided studies.

Red Flags to Watch For

High-dose GTE supplements have been linked to liver toxicity in other literature — the provided studies do not assess hepatotoxicity in humans at supplemental doses
Many products use vague 'green tea extract' labels without specifying EGCG content or standardization — dose matters significantly per the meta-analysis
In vitro antiviral and anticancer findings (test tube studies) are frequently misrepresented in marketing as human health benefits
Caffeine content in GTE products varies widely and can cause cardiovascular side effects in sensitive individuals

Supplement

Misleading

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Frequently Asked Questions

What does Green Tea Extract do?

Plant extract with catechins (EGCG) shown to boost fat burning during exercise and reduce gum inflammation.

What is the effective dose of Green Tea Extract?

No established dose from provided studies

Is Green Tea Extract safe?

High-dose GTE supplements have been linked to liver toxicity in other literature — the provided studies do not assess hepatotoxicity in humans at supplemental doses

What doesn't Green Tea Extract do?

Not a proven cancer preventer — the MIRACLE trial tested it for colorectal adenoma prevention but results aren't conclusive from the provided data.

Research Sources

PubMed
NIH DSLD

This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25