Ozempic (and its cousins Wegovy, Mounjaro, etc.) work primarily by acting on the brains appetite centers and digestive tract: they make you feel full sooner, slow gastric emptying, and improve insulin sensitivity, which together lead to eating less and storing less fat
Clinical Benefits & Side Effects Observations from Phase 2 human clinical trials
Price et al., Cell Metabolism )
For example, in studies where skin fibroblasts were treated with GHK-Cu, there was increased expression of extracellular matrix genes and antioxidant enzymes
In a landmark study, diet-induced obese mice treated with 5-Amino-1MQ showed a roughly 7% reduction in body mass over 11 days without any change in food intake
Comparison of changes in the extracellular concentration of noradrenaline in rat frontal cortex induced by sibutramine or d-amphetamine: modulation by alpha2-adrenoceptors