Green Tea Extract
herbs
Green tea extract is a concentrated source of polyphenols, particularly catechins and EGCG, derived from unoxidised tea leaves. It provides the bioactive compounds of green tea in a convenient supplement form with standardised levels of beneficial constituents.
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Benefits
Dosage
Typical Dose
300–400 mg daily
Upper Limit
800 mg daily
Timing
With meals to enhance absorption and reduce gastric irritation
Forms & Bioavailability
Standardised extract (EGCG)
High absorption when standardised to 50–98% polyphenols; EGCG content directly affects potency
Powder
Moderate absorption; variable polyphenol content depending on processing
Capsules
Good absorption; convenient dosing with consistent active compound levels
Side Effects
Interactions
Research Summary
Numerous studies demonstrate green tea extract's antioxidant and anti-inflammatory properties, with consistent evidence supporting benefits for weight management and metabolic health. Research indicates EGCG supports cardiovascular function and may enhance cognitive performance, though effects are often modest. Long-term safety studies are generally favourable, though concentrated extracts warrant cautious use due to potential hepatotoxicity at extreme doses.
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The Bottom Line on Green Tea Extract
Green Tea Extract is well-researched with strong evidence supporting its primary benefits.It is most commonly used for antioxidant support and metabolic function. As with any supplement, individual results vary. Start with the lower end of the dosage range and assess for 4-8 weeks before adjusting.
About Our Research
This profile is compiled from peer-reviewed research published on PubMed, the NIH Office of Dietary Supplements, and established nutritional science databases. Dosages reflect clinically-studied amounts from human trials where available. We update profiles as new research emerges. This is not medical advice — consult a healthcare professional before supplementing.
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Goal Guides for Green Tea Extract
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