
Retatrutide is a synthetic triple incretin agonist targeting GLP-1, GIP, and glucagon receptors simultaneously, representing the most advanced multi-pathway metabolic peptide currently in clinical research. Its triple receptor mechanism expands beyond dual-incretin approaches by incorporating glucagon receptor agonism, which significantly amplifies energy expenditure and lipid metabolism beyond what is achievable with GLP-1 or GIP alone. In preclinical and early clinical research, retatrutide demonstrated superior weight reduction compared to semaglutide (24.1% vs 19.7%) and showed significant improvements in renal function, lipid profiles, and pro-inflammatory cytokine suppression in metabolic disease models. It represents the frontier of incretin-based metabolic and obesity research.