The trade-off is less hands-on medical oversight, which some patients may miss if they want ongoing provider engagement or detailed lab monitoring
Here is how it compares to alternatives
In research formulations, the peptide is often combined with retinoids, vitamin C, and niacinamide
Specifically, at concentrations of 100 nM and 1,000 nM, GLP-1R agonist 2 significantly enhances 10 mM glucose-induced insulin secretion, similar to GLP-1, and this effect is abolished in islets from GLP-1 receptor knockout mice [2]
Several studies have reported an increase in hair density and thickness after application of hair lotions containing GHK-Cu, although these results are less robust than those observed on skin