from American Journal of Physiology, Endocrinology and Metabolism
Why is it so difficult to maintain a healthy weight after a substantial weight loss? A study of overweight patients involved in a two-year weight loss program may provide some clues. Researchers wrote in the American Journal of Physiology, Endocrinology and Metabolism that everybody said they were hungrier than when the program started. One reason is that when we lose weight the stomach releases greater amounts of a hormone that makes us feel hungry. Researchers say people who have been overweight will have to deal with increased hunger pangs for a long time. Another factor is that people who have lost weight need less energy to maintain their new body, and yet they feel hungrier because their body is trying to get that weight back.