After weight loss, the body keeps pulling back—and this study shows how hard

Weight that was regained after it had been lost may be the result of persistent, biologically driven hunger, according to a study led by a UT Southwestern Medical Center researcher. The study's findings appear to support the theory that humans who add back lost pounds are driven to return to a higher "set point" weight through hyperphagia, an insatiable hunger and intense preoccupation with food.