Weight Watchers - Effectiveness

Effectiveness

Weight Watchers claims that “Research shows that people who attend Weight Watchers meetings lose three times more weight than .” Specifically, the results of the study were that the mean weight loss of Weight Watchers participants was 2.3 times more than (3.3 times as much as) the self-help group at one year, and essentially undefined at two years. Weight Watchers also claims that members who both use Weight Watchers’ Web-based eTools and attend meetings lose half again as much weight as those who only attend meetings, but it fails to cite a study to back up this claim, instead only referring to an unspecified “12 week study comparing people who were instructed to attend Weight Watchers meetings and use eTools to people who were instructed to attend Weight Watchers meetings alone”.

A clinical study involving Atkins, Ornish, Weight Watchers and The Zone diets, published in 2005, reported that among the Weight Watchers participants the average net weight loss in a one-year period was 3.0 kilograms (6.6 lb). However, the study only included two months of “maximum effort”, letting the participants decide their level of adherence for the following ten months. Weight Watchers was the third most effective diet in terms of weight loss, and those that continued to adhere to any of the diets significantly decreased cardiac risk factors.