Green tea, derived from the leaves of Camellia sinensis, is one of the most extensively studied functional foods in nutritional science. Rich in polyphenols — particularly epigallocatechin gallate (EGCG) — green tea has attracted research interest across a remarkably broad range of health areas. Studies indicate that its potent antioxidant compounds may support cognitive function, help regulate blood sugar levels, and contribute to healthy weight management by influencing metabolism and fat oxidation. Research also suggests potential benefits for skin health, oral health, and cellular protection, with epidemiological data linking regular consumption to reduced markers of oxidative stress and age-related decline. Available in forms ranging from everyday brewed tea to concentrated matcha and delicate gyokuro, green tea remains one of the most accessible and well-documented functional beverages worldwide.
Compare this supplementResearch suggests that green tea and its constituent compounds — particularly the catechin EGCG, L-theanine, and caff...
View studies →Research suggests that green tea and its key polyphenol EGCG may support healthy aging through multiple biological pa...
View studies →Research suggests that green tea catechins — particularly when combined with caffeine — may support weight management...
View studies →Research suggests that green tea and its primary active compound, epigallocatechin gallate (EGCG), have demonstrated ...
View studies →Research suggests that green tea and its polyphenols, particularly EGCG, have been examined in the context of cancer ...
View studies →Research suggests that green tea and its key active compounds — particularly catechins like EGCG — may offer a range ...
View studies →The three studies provided do not investigate green tea or its effects on blood sugar regulation. The available resea...
View studies →Research suggests that green tea compounds may offer meaningful benefits for oral health, particularly in reducing le...
View studies →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 | 300–600 mg | Daily | Antioxidant support and cancer risk reduction | Based on RCTs using EGCG-standardized extracts for oxidative stress biomarkers and chemopreventive outcomes |
| Extract | 250–500 mg | Daily | Blood sugar regulation and insulin sensitivity | Common in RCTs examining green tea catechins on fasting glucose and HbA1c |
| Extract | 135–400 mg | Daily | Cognitive function and neuroprotection | Doses used in clinical trials assessing attention, memory, and EGCG brain bioavailability |
| Extract | 400–800 mg | Daily | Weight management and metabolic health | Common in clinical trials studying EGCG-standardized green tea extract for fat oxidation and body composition |
| Powder | 1–4 g | Daily | General health, antioxidant support, and anti-aging | Equivalent to 2–5 cups of brewed green tea; consistent with traditional use and observational study populations |
| Topical | 2–10 mg | Daily | Skin health, photoprotection, and anti-aging | Based on clinical studies using topical EGCG formulations for UV protection and skin elasticity outcomes |