GLP-1's first job is to tell your pancreas to release insulin , the hormone that moves sugar from your blood into your cells where it can be used as energy
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10.1124/jpet.105.094599 J
However, a recent clinical study reported that the infusion of exendin 9-39, a GLP-1R antagonist, did not affect ad libitum food intake in post-RYGB patients, although the authors also reported a concomitant increase in plasma levels of the anorexigenic hormone PYY (discussed below), which might offset the orexigenic effect of GLP-1R antagonism (94)
Effect of calcium supplementation in pregnancy on maternal bone outcomes in women with a low calcium intake
Retatrutide builds on this foundation by adding glucagon receptor activation, unlocking metabolic benefits that dual-pathway treatments cannot achieve