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both are now prescription-only through compounding pharmacies when used off-label for bodybuilding

This small molecule peptide functions as a selective nicotinamide N-methyltransferase (NNMT) inhibitor, targeting cellular metabolism at its source

Despite this, biological effects on VEGFR2 signaling, EGR-1 transcription, and tissue repair persist for hours to days after a single dose, suggesting effects are mediated by rapid signaling cascades whose downstream consequences outlast the parent compound

The peptide is thought to attract myoblasts derived from muscle satellite cells, facilitating skeletal muscle regeneration [33]