Interesting. I think that caffeine in general has the same properties too.
Caffeine in moderation is a good thing. It improves cognitive function, inhibits insulin resistance, and speeds up your metabolism. Too much caffeine can actually make us gain weight by burning out our adrenal glands and releasing stress hormones. For this reason, 400 milligrams (mg) a day should be the limit. (That’s the equivalent of 1 to 2 large cups of coffee, depending on how strongly it’s brewed.)
Some sources of caffeine are better than others. Organic, filtered coffee (not mixed up with sugar, artificial sweeteners, or cream) is okay. Green tea is a better choice because it promotes fat oxidation and is believed to improve insulin sensitivity.
Limit your intake of caffeinated beverages to one or two a day — and because caffeine is a diuretic, you should drink one glass of water for every caffeinated drink. (source of info – Jillian Michaels site and WebMD)