Optimization of Dietary Adherence in a Mobile Weight Loss Intervention

Inclusion Criteria: * BMI 25-50 kg/m2 at baseline * Own a smartphone with an active data and text messaging plan * English-speaking and writing * Willing to be randomized to any of the additional treatment components Exclusion Criteria: * Lost 5% or more of body weight (and kept it off) in the last 3 months * Past diagnosis of or receiving treatment for a clinically diagnosed eating disorder (anorexia nervosa or bulimia nervosa) * Current symptoms of alcohol or substance dependence * Currently pregnant, pregnant within the past 6 months, currently breastfeeding, or planning to become pregnant within the next 6 months * Untreated thyroid disease or any changes (type or dose) in thyroid medication in the last 6 months * Hospitalization for depression or other psychiatric disorders within the past 12 months * History of psychotic disorder or bipolar disorder * Currently participating in a weight loss, nutrition, or physical activity study or program or other study that would interfere with this study * Currently using prescription medications with known effects on appetite or weight (e.g., oral steroids, weight loss medications), except individuals on a stable dose of SSRIs for 3 months * Current use of bone acting medications (e.g., raloxifene, calcitonin, parathyroid hormone during the past year, PTH-analogues \[e.g., teriparatide, abaloparatide\], sclerostin inhibitors (romosozumbab), RANK ligand inhibitors (denosumab) or bisphosphonates during the last two years * Report …