Does Weight Watchers have evidence of its effectiveness in the long-term?
According to an independent review of commercial weight-loss programs that was published in the January 2005 issue of Annals of Internal Medicine, Weight Watchers is the only weight-loss company with scientific research to demonstrate the efficacy of its program. While several studies on Weight Watchers have been conducted, the best known is a randomized, two-year, prospective, multi-center clinical trial (April 9, 2003 Journal of the American Medical Association) comparing people attending Weight Watchers meetings to people following a self help diet regimen. People who attended Weight Watchers meetings lost 3 times more weight than those who were trying to lose weight on their own.
