While it's difficult to compare scientific studies because of inherent design variance, here are the facts:

Their Study: 8 weeks taking America's #1 selling ephedra-based diet pill (“America's best seller”) with diet and exercise:

The Results: The study showed that subjects who used "America's best seller" for 8 weeks experienced an average weight loss of 4.8 ounces per week more than the placebo group. Yes, you heard right... four point eight ounces. That's less than one-third of a pound per week better than placebo, for 8 weeks - a grand total of less than 2 and 1/2 pounds of additional weight loss after 56 days and nights of diet and exercise when compared to a sugar pill.

Our Study: 45 days (6.4 weeks) taking the active formula in Zantrex-3 WITHOUT diet and exercise:

The Results: Subjects using the proven active formula in Zantrex-3, for a little over 6 weeks, experienced an average weight-loss of a whopping 11.2 pounds – 1,696% more weight loss than the placebo group, and 546% more weight loss per week^† (over and above placebo... of course) than the entire group of people who used “America's best seller” - and that's without having to follow any prescribed diet plan or supervised exercise program! That's the power of the active Zantrex-3 formula.