Just saw an interesting article about leptin and weight loss.

I have been losing weight on a system called EIROfit that takes advantage of this technology.

Here is a bit of an article explaining the technology from a friend of mine (get ready for science):

Leptin is a hormone made by fat cells that regulates food intake and energy expenditure.  Leptin communicates between fat cells and the brain.  Leptin’s messages:  Stop eating/burn fat, or Eat more/store fat.  Years ago scientist thought that if you lowered Leptin levels you would increase appetite and increase fat storage.  We now know that just the opposite is true, lower Leptin levels decrease appetite and increase fat metabolism.  There is clear evidence that green tea’s polyphenols (EGCG) are a factor in depressing Leptin levels as well as affecting other hormone levels important in regulating appetite.  There is evidence that EGCG of green tea holds promise in many areas of weight loss.