for the participants, the loss was shockingly slight. Weight Watchers produced an average loss in body weight of just over 5 percent. The news got even worse over time. Much of the weight loss was fleeting. At the end of two years, the participants had put on enough new weight that their average net loss was barely 3 percent. By these numbers, a 200-pound woman in Weight Watchers could expect to get down to 189, and then bounce back to 194.
