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Liraglutide vs Semaglutide: The Molecular Difference Liraglutide (Saxenda): First-generation GLP-1 agonist for weight loss Approximately 97% amino acid similarity to natural GLP-1 Half-life of approximately 13 hours Requires daily injection to maintain blood levels Semaglutide (Ozempic, Wegovy): Second-generation GLP-1 agonist Modified structure for greater potency and longer action Half-life of approximately 7 days Weekly injection maintains stable blood levels The structural modifications in semaglutide make it bind more effectively to GLP-1 receptors and resist breakdown longer
BMJ Open Gastroenterology, 12(1), e001704
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Type 1 contains vildagliptin and saxagliptin, which bind only to the S1 and S2 subsites and form a covalent bond with the nitrile group of their cyanopyrrolidine moiety and Ser630 of DPP-4
doi: 10.1590/rbz4720160328 185