I loved the old epehdra based Xenadrine RFA (the new formula is not as good). Lost 30 lbs of "baby fat" (post pregnancy hang on) using it, light dieting and exercise (lots of cardio, weights on circuit). I also really recommend the GNC Pro Performance brand "Cuts", it has no ephedrine or ephedrine substitute but works great. It does have caffeine, green tea and white willow bark (herbal aspirin). It also contains coleus forskohlii which is a natural metabolism booster. I also like to add Yohimbe for extra punch and and CLA to help keep the fat lost at bay.