Has anyone tried yerba mate? Information at this link...
http://www.a1b2c3.com/drugs/yer_03.htm
...sounds to good to be true, but I've been drinking this for a few days, and it's kind of amazing.
The thing is it does have some MAO inhibition, so if you take selegeline or azilect or any other SSRI, you probably shouldn't try it.