The efx doesn't do a thing for me after switching from the regular. If you've never taken ephedrine and you don't drink a lot of caffeine, it might do something for you, but it doesn't even phase me. I'm switching back to regular as soon as this bottle is empty.
I know the regular stuff works from personal experience. I remeber one week when i was out of town i didnt even work out. All i did was eat right and get enough sleep. Grant you this was the first week i ever took it but i still lost 6 pounds. I was like damn thats great. That was the only time it worked like that though. Right now im using hydroxycut to lean down but you have to take so much more it is nuts. Once im done with it im goin to back regular Xenedrine.