do glp 1 meds cause muscle loss GLP-1 Agonists: Using Semaglutide, Tirzepatide, and Orforglipron for Weight and Obesity GLP-1s don’t inherently cause muscle

Fine line reduction (weeks 6 to 12): shallow dynamic lines around the eyes and mouth soften as the surrounding matrix becomes better hydrated and structurally supported

10.1038/nature03354 145 RongQ.HanB.LiY.YinH.LiJ.HouY

( A ) Intracellular accumulation of cAMP was measured by enzymatic immunoassay in lysates from caSMCs treated for 10 minutes with 100 nM each of GLP-1, forskolin, or PBS control, with or without 20 M sacubitril, a neutral endopeptidase inhibitor ( n = 3/treatment, each in triplicate)

Tirzepatide engages GIP near the strength of the natural hormone but activates GLP-1 about 18 times more weakly than natural GLP-1. After accounting for protein binding in blood, the drug is roughly 20-fold GIP-forward and has no meaningful glucagon activity