Original: One study showed an average 11.2 pound (5.1 kilogram) weight loss in a group taking a mixture of yerba mate, guarana, and damiana, compared to an average one pound loss in a placebo group after 45 days.
Simplified: This study shows  an average 11.2 pound weight loss in a group taking a mixture of yerba mate, guaraná and damiana, compared to an average 1 pound loss in a placebo group after 45 days.