Green tea is considered to be one of the strongest stimulants of natural fat burning. These effects are caused by the action of flavonoids, the most powerful among them being epigalokatehingalat (EGCG). It has been shown that EGCG increases the thermogenic effect, which stimulates metabolism and fat burning. It also acts as a preventive, as it prevents the loading of fat in such a way that excess calories ar used as an energy source. Due to the positive effects on weight loss, green tea is found in a variety of products designed to regulate body weight.