Green Tea Extract, derived from the leaves of Camellia sinensis, is one of the most widely studied herbal supplements, prized for its rich concentration of polyphenols — particularly epigallocatechin gallate (EGCG). Research suggests that these compounds offer meaningful antioxidant support, helping protect cells from oxidative stress, and studies indicate potential benefits for weight management by supporting metabolic function and fat oxidation. Emerging evidence also points to promising roles in blood sugar regulation, cognitive function, and skin health, while some epidemiological research has explored associations between green tea consumption and reduced cancer risk, though findings remain preliminary. Available in forms such as standardized EGCG extract, matcha, and decaffeinated options, green tea extract continues to attract scientific interest as researchers work to better understand its wide-ranging biological effects.
Compare this supplementThe four studies linked here do not actually investigate green tea extract or its antioxidant properties — they exami...
View studies →Research suggests that the studies provided do not actually investigate green tea extract or its primary compound EGC...
View studies →Research suggests that green tea extract and its constituent catechins may support cognitive function and offer neuro...
View studies →Research suggests that green tea extract may offer several benefits for skin health, with evidence pointing toward im...
View studies →Research suggests that green tea extract may offer modest benefits for weight management, particularly through mechan...
View studies →The single study provided does not contain evidence related to green tea extract or blood sugar regulation — it exami...
View studies →Green tea catechins (EGCG) significantly reduce non-heme iron absorption.
View details →L-theanine modulates the stimulant effects of caffeine, creating calm focus.
View details →These are commonly referenced dosage ranges for this supplement. They are not medical recommendations. Always consult a healthcare provider before supplementing.
| Form | Dose range | Frequency | Studied for | Source |
|---|---|---|---|---|
| Extract | 250–500 mg | Daily | Antioxidant support and general health | Frequently used dose range in clinical trials measuring oxidative stress markers |
| Extract | 500–1,000 mg | Daily | Blood sugar regulation and insulin sensitivity | Based on RCTs assessing fasting glucose and insulin response in at-risk populations |
| Extract | 600–900 mg | Daily | Cancer risk reduction and chemopreventive research | Doses studied in human trials for prostate and colorectal cancer risk biomarkers |
| Extract | 135–400 mg | Daily | Cognitive function and neuroprotection | Used in trials examining attention, working memory, and EGCG brain bioavailability |
| Extract | 400–800 mg | Daily | Weight management and metabolic support | Common in RCTs examining EGCG-standardized extracts for body weight and fat oxidation |
| Topical | 2–10 mg | As needed | Skin health and photoprotection | Concentration ranges used in topical formulation studies for UV-induced skin damage |