PEG-MGF
Mechanism.
PEG-MGF is a PEGylated (polyethylene glycol-modified) form of mechano growth factor, a splice variant of IGF-1 (insulin-like growth factor 1) that is produced in response to mechanical stress on muscle tissue. PEGylation extends its half-life from minutes to hours. MGF activates muscle satellite cells and promotes muscle repair. PEG-MGF is used in bodybuilding and anti-aging contexts but has no approved medical use and very limited human research.
When you exercise hard enough to cause micro-tears in muscle, your body produces MGF as a repair signal to wake up dormant muscle stem cells. PEG-MGF is a lab-made version of that signal with a protective coating that keeps it active in your bloodstream much longer than the natural version.
How it's taken.
Values below describe how PEG-MGF has been administered in published trials and labeling. Provided for educational purposes only — this is not medical advice and not instructions for self-administration. Consult your healthcare provider before making any health decision.
PEGylated Mechano Growth Factor (MGF/IGF-1Ec). PEGylation extends half-life. Injected locally into target muscle. Not FDA-approved. Research compound used in bodybuilding contexts.
Use the free peptide calculator for dilution, unit conversion, and injection volume.
Side effects, rare serious events, who shouldn't.
Every study we cite.
Each study with its published finding and a plain-language note on limitations or funding.