People mainly take Egcg for mood, energy, focus. Based on 43 first-hand reports and 45 meta-analyses & systematic reviews in the medical literature. Ranked #471 of 1,974 overall.
Of reports that state an outcome, 70% are positive.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: High doses and long-term consumption of green tea could achieve better benefits, providing a basis for the dietary guidelines for green tea in preventing cancer. However, given the heterogeneity of the included studies, our findings still need to be validated by conducting higher-quality studies.
PubMed 40832777 ↗Conclusion: A safe intake level of 338 mg EGCG/day for adults was derived from toxicological and human safety data for tea preparations ingested as a solid bolus dose. An Observed Safe Level (OSL) of 704 mg EGCG/day might be considered for tea preparations in beverage form based on human AE data.
PubMed 29580974 ↗Conclusion: Our analysis suggests that green tea consumption is effective in the prophylaxis of influenza infections. To confirm the findings before implementation, longitudinal clinical trials with specific doses of green tea consumption are warranted.
PubMed 34209247 ↗Conclusion: β-elemene, LINGO-1-Fc, Ibuprofen, SiRhoA, RhoA + FK506, Fasudil, p21Cip1/WAF1 and Y-27,632 have similar effects to BA-210, they can promote axon germination and nerve fiber regeneration after thoracic spinal cord injury and reduce the formation of syringomyelia and protect white matter, thereby improving locomotor recovery. RhoA inhibitors have great potential to restore motor function and provide a new trend for the treatment of SCI.
PubMed 33197553 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
Verbatim quotes, shortened only — each links to the original discussion.
“the best longevity supplement I have come across is a combination of coq10, ginger root, garlic and egcg. The boost from egcg is noticeable”
“It honestly is like a milder modafinil to me without the sides.”
“stick to once or twice a week and use EGCG to inhibit peripheral amino acid decarboxylase”
“This is why I keep telling everyone to take EGCG with their 5-HTP. EGCG is an irreversible aromatic L-amino acid decarboxylase inhibitor.”
“be sure to take EGCG with your 5-HTP, as that will inhibit L-aromatic amino acid decarboxylase”
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate