While cardiovascular benefits of tirzepatide, a glucose-dependent insulinotropic peptide/glucagon-like peptide-1 receptor agonist in patients with type 2 diabetes mellitus (T2DM), and its comparative effectiveness vs glucagon-like peptide-1 receptor agonists (GLP-1RAs) is studied in randomized controlled trials, real-world outcomes may provide critical insights. This evidence concerns the gene GLP1R and diabetes mellitus.