This popular points-counting diet helps dieters drop pounds and keep
them off. In experts’ ratings, Weight Watchers bested all other ranked
diets for both short-term and long-term weight loss. That doesn’t
guarantee it will work for everyone, of course. Its average rating of
“moderately effective” for long-term weight loss reflects the difficulty
dieters have in staying on the wagon, even when using the best
weight-loss diet available.