The aforementioned hormones will be sampled ½ hour before and one hour after the start of the food intake tests at lunch on days 0 and 21. The timing of these samples is based on the finding that PYY3-36 and GLP-1 peak one hour after a meal [17, 18]. Therefore, we will compare levels prior to meals and the change after the meals between the Depakote and placebo groups. Different pre-meal levels of these hormones and peptides can be correlated with food intake between the groups, and differential change in these hormones in response to the meal will be evaluated between the groups and correlated with food intake.