Green tea increases the body's ability to burn fat. The tea boosts the body's metabolic rate. According to Authority Nutrition, green tea does not have this effect on everyone, so fat-burning potential by green tea consumption varies.
The main ingredient in green tea, EGCG, has been studied for its ability to prompt the body to lose weight. In some individuals, the ingredient caused weight loss. For others, it had no effect, according to WebMD. In addition to green tea's potential ability to help the body shed pounds, the tea can also have a calming effect on the body. This is due to green tea's L-theanine content. L-theanine reduces anxiety and increases dopamine.