The authors describe several studies discussing potential antiobesity mechanisms of GTCs. These mechanisms include increased energy expenditure, increased fat oxidation, decreased appetite, and decreased nutrient absorption. The evidence supporting benefit of tea consumption or supplementation with GTC extracts on body weight and/or body composition is mixed, especially in Caucasians. However, given the low cost, ready availability, and safety of moderate tea consumption, this approach may be beneficial for inclusion in a diet or weight/fat loss management plan.