The concentration of EGCG—the superpotent nutrient found in green tea—may be as much as 137 times greater in powdered matcha tea. EGCG can simultaneously boost lipolysis (the breakdown of fat) and block adipogenesis (the formation of new fat cells). One study found that men who drank green tea containing 136 milligrams of EGCG—what you'd find in a single 4-gram serving of matcha—lost twice as much weight than a placebo group and four times as much belly fat over the course of three months.
The stress hormone cortisol can really screw with your belly. The problem with cortisol is two-fold: First, the chemical makeup of cortisol causes the body to store visceral fat. Visceral fat is stored between your main organs and in the midsection and is the most dangerous type of fat. Experts state that visceral fat increases the risk of diabetes and heart disease.