This study wishes to look at the 24-hour rhythm of certain fats in the blood stream. Recent studies in animals and healthy participants suggest that unusual eating habits may be connected to a change in the 24-hour rhythm of the blood fats the investigators wish to measure. The investigators will ask persons suffering from night eating syndrome, a condition where people eat additional meals throughout the night, to participate in this study. Healthy volunteers who are of the same age and gender, and have a comparable body-mass-index, a number calculated from a person's weight and height, will also be asked to participate.