During the Med diet arm, participants will pick up their meals and instructions from the study team. During the fast food diet arm, participants will be given gift cards and meal plans to follow for the on-campus fast food restaurants and will purchase meals at the fast food restaurants on their own. For both dietary interventions, participants will follow the appropriate meal plan, attached with this submission. They will also be instructed to maintain their physical activity level during the study period. Subjects will be contacted once during each dietary period by e-mail or phone and will be asked about their general wellbeing, and to remind them to collect a stool sample for the next visit. To monitor compliance, participants will fill out a compliance survey as well as bring in any leftover food they do not consume. The leftover foods plus packaging will be weighed, and the weight of packaging alone subtracted in order to obtain an accurate measurement of how much participants actually consumed.