How do you know that iluvdeal? There aren't any studies that say that. I can pretty much say with certainty that Metabolife will make you lose weight. It's speed, and speed makes you lose weight. They can blab about their special formula all they want, but when it comes down to it, the ephedrine (MaHuang) and caffeine (guarana) are what cause the weightloss. The rest of the crap is useless. As soon as you stop the metabolife, you'll gain the weight back. I wouldn't recommend this to anyone, its long term effects are unstudied, but common sense tells you that speed is bad, and this is nothing more than weak speed.
What is the correct way to use it? What it says on the label? And just how did the manufacturer come up with the info they put on the label? There is no evidence that metabolife is safe for chronic use.