Willpower plays a role in dieting. But keeping the weight off after you've lost it? This is where our physiology can get in the way. Research suggests that hormone shifts that follow weight loss play a role in changing the way our brain responds to food.
"After you've lost weight, you have an increase in the emotional response to food," says Columbia University Medical Center researcher Michael Rosenbaum, who studies the body's response to weight loss. He says you also see "a decrease in the activity of brain systems that might be more involved in restraint."
February 22, 2010 on NPR.
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