Overconsumption of fatty, sugary foods can lead to changes in brain receptors. Researchers at Johns Hopkins University School of Medicine found that continuous eating or binge-eating of foods high in fat and sugar altered opioid receptor levels in an area of the brain that controls food intake. Opioids are a family of chemicals with actions similar to those of morphine - they occur naturally in the brain and have been linked to feelings of pleasure and euphoria.
You can find out more about this research at
http://www.sciencedaily.com/releases/2009/07/090727102024.htm
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