Green Tea
Also known as: Camellia sinensis, green tea extract, GTE, EGCG, epigallocatechin gallate, matcha
Effective Dosage
No established dose from provided studies
What the Science Says
Green tea is a beverage and supplement derived from the leaves of Camellia sinensis, rich in antioxidant compounds called catechins — especially EGCG. The provided studies suggest it may improve oral health in cancer patients when used as a mouth rinse, help reduce insulin resistance in adults with visceral obesity when combined with inulin, and show anti-inflammatory effects in postmenopausal women. Lab studies also show its catechins can inactivate certain viruses and suppress cancer cell growth, though these findings have not been confirmed in human trials.
What It Doesn't Do
Not proven to melt belly fat on its own — one trial showed improved insulin resistance without reducing visceral fat. No evidence from these studies it boosts metabolism or causes significant weight loss. Lab results showing it kills cancer cells or viruses don't mean it works that way in your body. Don't expect it to replace cancer treatment or prevent infections.
Evidence-Based Benefits
Green tea is rich in polyphenols, particularly catechins, which have been shown to support weight loss, improve metabolic health, and provide antioxidant effects. Regular consumption may also enhance cognitive function and support cardiovascular health.
Strong EvidenceEffective at: 250-500 mg daily
Source: auto-research
Absorption & Bioavailability
Unknown from provided studies — no pharmacokinetic data reported in the abstracts provided.
Red Flags to Watch For
- High-dose green tea extract supplements have been linked to liver toxicity in other literature — not addressed in these studies
- Most promising findings (antiviral, anticancer) are from lab or animal studies, not human trials
- Several key study abstracts were unavailable, limiting confidence in dose and outcome data
- Products marketed for weight loss often contain far higher doses than studied, increasing risk of side effects
- Green tea contains caffeine — people sensitive to stimulants should check product caffeine content
Products Containing Green Tea
See how Green Tea is used in these analyzed products:
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: 2026-04-06