Acquired differences in brain responses among monozygotic twins discordant for restrained eating

► Using fMRI, we studied 10 monozygotic twin pairs discordant for restrained eating. ► Restrained eaters' response to food cues differed from their unrestrained co-twins. ► Brain areas implicated include the amygdala, orbitofrontal cortex, and occipital lobe. ► Differences were independent of genetic or familial factors.