Adherence
Several methods will be used to assess intervention adherence. First, weekly attendance at individual sessions will be tracked. Participants missing two consecutive individual sessions will be called and text messaged by the interventionist to encourage attendance. Second, engagement with weekly social media content will be monitored using Facebook analytics which is reported on the individual level. Participants not engaging with the social media content for two consecutive weeks will be reminded to engage with the content. Participants receiving social media content via email who fail to confirm receipt for two consecutive weeks will be contacted and asked to confirm receipt of the materials. Third, body weight will be monitored weekly in the WL-A and WL-Med groups. Participants will be asked to weigh in person or transmit a photo via secure text message during their weekly one-on-one meetings. Participants who lose < 1 lb. per week for 3 consecutive weeks will discuss with their interventionist barriers to adopting a calorie-restricted eating plan and problem solve accordingly. If necessary, the interventionist will revise the calorie prescription (WL-A and WL-Med) and the number of daily MedDiet exchanges (WL-Med). For the Med-A group, we will record the weight of participants monthly to confirm adherence. Lastly, adherence to the MedDiet will be monitored during the first 6 weeks of the intervention among the Med-A and WL-Med participants. During weekly meetings with the interventionist, participants will complete the MEPA-III screener [