Managing Obesity by Combining Behavioral Weight Loss and Commercial Approaches

Inclusion Criteria: * Age between 30-65 years * BMI between 27-50 kg/m2 * Written approval/consent from primary health care provider Exclusion Criteria: * Unable to walk 2 blocks without stopping. * Currently participating in a weight loss program or taking weight loss medication. * Participated in a weight loss program in the last year * Took weight loss medication in the last 6 months. * Participated in Weight Watchers in last 2 years. * Lost \>=5% of body weight during 6 months prior to screening. * Pregnant, lactating, less than 6 months postpartum, or plan to become pregnant during study time frame. * Report conditions that in the judgment of the principal investigator would render them potentially unlikely to follow protocol for the 12 month study. * Report a medical condition that would affect the safety and/or efficacy of a weight management program involving changes in diet and physical activity.