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Nature Metabolism DOI:10.1038/s42255-026-01534-8 Abstract Semaglutide drives weight loss through cAMP-dependent mechanisms in GLP1R-1 expressing hindbrain neurons Glucagon-like peptide 1 receptor (GLP1R) agonists, such as semaglutide, drive weight loss by binding to GLP1Rsclassically described as G s -coupled G-protein-coupled receptorsin the brain

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GLP-1 therapies are only used as an addition, not a replacement

For researchers on the starting 2.5 mg dose , a 10 mg vial is often more practical since it can be used within the 28-day window