Green Tea became the darling of the weight loss world over a decade ago, when scientists at The University of Chicago Medical Center discovered that a major chemical component of green tea caused test animals to lose up to 21 percent of their body weight. Rodents given EGCG (epigallocatechin gallate) taken directly from green tea consumed up to 60 percent less food after taking it for a week. That study, published in the March 2000 issue of Endocrinology, explained that the reduction in appetite was due to leptin, a hormone that regulates appetite.

But interestingly, even when rodents lacking a leptin receptor were given EGCG, they lost weight, thus providing evidence that appetite suppression is only part of the reason that green tea helps people lose weight. A much more robust answer involves the idea that EGCG elevates the metabolism directly, thereby contributing to increased thermogenisis (heat production) and therefore lipolysis (fat loss).In 2007, a study published by the Journal of the American College of Nutrition, confirmed that EGCG increases energy expenditure both in a fasted state and after a meal (postprandial):

So while we know that EGCG will reduce appetite by the suppression of Leptin, it’s also become apparent that it increases the amount of calories burned at rest, both before and after a meal. But that’s not all, because not only does this stuff reduce appetite and increase energy expenditure, it also helps lower and control blood sugar:

Pretty cool, right? So now we’re 11 years past when the original rodent study was performed at The University of Chicago Medical Center, and we’ve found out a lot more about the effects of EGCG on fat loss. And the data is astounding, because it appears that this compound works on fat loss through nearly every mechanism possible: food intake goes down, thermogenesis goes up, fat (lipid) absorption goes down, muscles absorb more glucose, and more fat gets burned while lean tissue actually increases:

So you can see what all of the hype is about with this stuff. It’s one of the best fat burners around, it’s a non-stimulant (making it perfect to stack with caffeine), and you don’t need to cycle off, because it’s loaded with anti-oxidants and other healthy nutrients.