Howdy! Looking for opinions on the dietary supplement Xenadrine EFX. I've heard it's supposed to be really good at boosting metabolism and burning fat. The bottle also says it's Ephedra-free.

My question: Can this stuff cause false positives on drug tests? I know ephedra has a history of showing up as meth on drug screens, but this stuff doesn't have it. I'm looking to boost my fat-burning abilities, but not at the risk of showing positive for methamphetamines.

Any help/advice is appreciated.