Buy Mounjaro, Tirzepatide, Zepbound prescription free online Abstract Mounjaro (tirzepatide) represents a landmark advancement in peptide-based metabolic science as the first approved dual glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor agonist. Engineered as a 39-amino-acid synthetic peptide conjugated to a C20 fatty di-acid moiety, tirzepatide achieves balanced, high-affinity activation of both incretin receptors,