GLP-1 Studies Explained: The Complete Evidence Guide (2026 Edition)
OneDayMD Master Evidence Guide • Updated September 2026 Semaglutide, tirzepatide, oral GLP-1 medicines, retatrutide and the next generation of metabolic therapies have changed the obesity and cardiometabolic treatment landscape. But the phrase “GLP-1 drug” can hide major differences in mechanism, indication, dose, study population and clinical evidence. This master guide organizes the most important clinical trials into an ebook-style reference—from the landmark STEP and SURMOUNT obesity trials to SELECT , FLOW , SUMMIT , ESSENCE , OASIS 4 , ATTAIN-1 , TRIUMPH, SURPASS and the emerging CagriSema program. 2026 update: The field has moved beyond injections alone. Oral semaglutide (Wegovy tablets) and orforglipron (Foundayo) are now U.S. FDA-approved options for weight management, while higher-dose semaglutide (Wegovy HD) has also ...