The most recently approved FDA medication for the treatment of obesity, tirzepatide, exerts its physiologic effects as a dual GLP-1R and Gastric Inhibitory Polypeptide Receptor (GIP-R) agonist with better efficacy than the standalone GIP-R agonist semaglutide [39]. This evidence concerns the gene GIPR and obesity due to melanocortin 4 receptor deficiency.