One study showed an average NUMBER@1 pound -LRB- NUMBER@2 kilogram -RRB- 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 NUMBER@3 days .

This study shows an average NUMBER@1 pound weight loss in a group taking a mixture of yerba mate , guaraná and damiana , compared to an average NUMBER@4 pound loss in a placebo group after NUMBER@3 days .
