Green tea catechins (GTC) are polyphenolic compounds present in the unfermented dried leaves of the plant. The result from a number of studies observed consumption of GTC (270 mg to 1200 mg/day) may reduce body weight and fat. Caffeine, naturally present in green tea, also influences sympathetic nervous system (SNS) activity[3], and may act synergistically with GTC to increase energy expenditure and fat oxidation.[23] The role of green tea extract (GTE) is fat metabolism and its influence on health and exercise performance.[7] The results illustrated from a number of papers positive effects of GTE on fat metabolism at rest and during exercise, following both shorter and longer term intake. Catechin-caffeine

mixtures or a caffeine-only supplementation stimulates daily energy expenditure dose dependently by 0.4–0.5 kJ mg-1 administered. Compared with placebo, daily fat-oxidation was only significantly increased after catechin-caffeine mixtures ingestion.[2,6,7,9]