Most of the weight that is lost after gastric bypass surgery will occur within the first year. The average person then regains about thirty-five percent of what he or she has lost. It can be frustrating and demoralizing.

The explanations for these unfortunate weight-gain phenomena are both psycho-social and environmental. Regardless of cause, the fact remains that regaining the weight that has been lost from bariatric surgery poses not only health risks but dramatically compromises the quality...