EGCG, the main catechin in green tea, have been extensively studied for its effect on weight loss or management.
According to a human study published in the European Journal of Clinical Nutrition, a low dose of EGCG was found to increase fat oxidation by 33.3%.
In the study on the effect of EGCG on fat oxidation in overweight/obese male volunteers, they took 4 supplements – low EGCG (300 mg), high EGCG (600 mg), caffeine (200 mg), EGCG/caffeine (300 mg/200 mg) or placebo – orally for 3 days.
The increase in fat oxidation for low EGCG is similar to that of caffeine. However, when both (low EGCG and caffeine) are taken together, they increased fat oxidation by almost 50%!