National Weight Control Registry

The National Weight Control Registry (NWCR) is a research study that includes people (18 years or older) who have lost at least 13.6 kg (30 lbs) of weight and kept it off for at least one year. There are currently over 10,000 members enrolled in the study, making it perhaps the largest study of weight loss ever conducted. Members complete annual questionnaires about their current weight, diet and exercise habits, and behavioral strategies for weight loss maintenance.