Table 1 summary of long term (≥ 2 weeks) interventional studies with green tea extract
Study | Daily intake of EGCG | Duration of trial | Sample size | Total catechins | EGCG | ECG | EGC | EC | Caffeine |
|---|---|---|---|---|---|---|---|---|---|
[38] | 300 mg | 12 months | 60 | 76% | 52% | 6% | 6% | 12% | 0.1% |
[7] | 350 mg | 2 months | 69 | 84% | Not specified | 19% | |||
[31] | 800 mg | 1 month | 8 | 98% | 70% | 13% | 11% | ||
[9] | 150 mg | 12 months | 71 | 20% | 11% | 2% | 7% | 0.2% | 3% |
[39] | 225 mg | 3 months | 64 | 100% | 35% | 17% | < 1% | < 1% | 7% |
[40] | 800 mg | 1 month | 26 | 80%-98% | 50-75% | 12% | 2% | ||
[6] | 2000 mg | 6 months | 5 | 98% | 70% | 13% | 11% | ||
[2] | 300 mg | 2 weeks | 42 | 100% | 100% |