What Is Tirz? Understanding the Tirzepatide-Class Peptide Revolution Tirz is the abbreviated research designation for peptides in the tirzepatide class of dual-agonist compounds simultaneously targeting the GLP-1 (Glucagon-Like Peptide-1) and GIP (Gastric Inhibitory Polypeptide) receptors. While “tirzepatide” refers to the specific FDA-approved therapeutic, tirz has become the broader shorthand within the research community for GIP/GLP-1…