PTH and obesity due to melanocortin 4 receptor deficiency: In the present study, we aimed to document the association of WL% with thyroid hormones, their calculated derivatives, 25(OH)D, parathyroid hormone (PTH), calcium, and phosphorus levels in a cohort of patients with T2DM or prediabetes and Class II or Class III obesity at baseline and to address the probable mechanisms involved in these associations.