Green Tea

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

Evidence under review. — Not yet rated

Antioxidant-rich plant extract. Best evidence for boosting fat burning during exercise and supporting oral health.

What it does

Green tea is a beverage and supplement derived from the leaves of Camellia sinensis, rich in polyphenols called catechins (especially EGCG) and caffeine. Clinical evidence shows green tea extract...
Evidence quality

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

613 mg catechins/day (muscle); varies by application
Found in

310 Lemonade - Peach Pear, ALLMAX Creatine Monohydrate Powder, Nature's Answer Liquid Tart Cherry and 17 more

What the Science Says

Green tea is a beverage and supplement derived from the leaves of Camellia sinensis, rich in polyphenols called catechins (especially EGCG) and caffeine. Clinical evidence shows green tea extract significantly increases fat oxidation during and after exercise, and catechin-enriched green tea may help preserve lower-limb muscle strength in older adults when combined with exercise. A green tea mouth rinse has also shown meaningful improvements in oral health status and pain in advanced head and neck cancer patients over 6 weeks.

What It Doesn't Do

Won't cure insomnia — a clinical trial found no improvement in sleep quality or quality of life compared to placebo. Not a proven standalone weight-loss solution. No strong evidence it melts belly fat on its own. Don't expect dramatic muscle gains from catechins alone.

Evidence-Based Benefits

Increases fat burning during and after exercise compared to placebo.

Moderate Evidence

Effective at: Varies; dose-response relationship observed in meta-analysis

Supporting studies (click to view on PubMed):

PMID 42155001

Combined with exercise, improves lower-limb muscle strength in older adults over 24 weeks.

Weak Evidence

Effective at: 613 mg catechins/day for 24 weeks

Supporting studies (click to view on PubMed):

PMID 42030620

Green tea mouth rinse improves oral health and reduces pain in advanced head and neck cancer patients.

Moderate Evidence

Effective at: Mouth rinse used 3x daily for 6 weeks

Supporting studies (click to view on PubMed):

PMID 41920369

Green tea catechins inhibit enzymes that break down tooth structure during acid erosion.

Weak Evidence

Effective at: No established dose from provided studies

Supporting studies (click to view on PubMed):

PMID 42174532

Absorption & Bioavailability

Moderate — catechins like EGCG have limited and variable absorption in standard forms; nanoparticle encapsulation and protein carriers (albumin) may improve stability and uptake, but these are experimental approaches not yet standard in consumer products.

Red Flags to Watch For

High-dose green tea extract supplements have been linked to liver toxicity in rare cases — not seen in beverage form
Contains caffeine, which can disrupt sleep, raise heart rate, or interact with medications if consumed in large amounts
Many products use vague 'green tea extract' labels without specifying catechin content — look for standardized EGCG or catechin amounts
Sleep-support products containing green tea are not backed by evidence — one RCT found no benefit over placebo for insomnia

Mostly Legit

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Frequently Asked Questions

What does Green Tea do?

Antioxidant-rich plant extract. Best evidence for boosting fat burning during exercise and supporting oral health.

What is the effective dose of Green Tea?

613 mg catechins/day (muscle); varies by application

Is Green Tea safe?

High-dose green tea extract supplements have been linked to liver toxicity in rare cases — not seen in beverage form

What doesn't Green Tea do?

Won't cure insomnia — a clinical trial found no improvement in sleep quality or quality of life compared to placebo.

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