PEG-MGF (Polyethylene Glycol–Mechano Growth Factor) is a synthetic version of MGF, a variant of IGF-1 linked to muscle repair. Pegylation extends its half-life, allowing longer biological activity compared to regular MGF. Research suggests PEG-MGF may support muscle regeneration, heart protection, bone healing, and neurogenesis. Scientists view it as a more stable and potentially more effective form of MGF in regenerative studies.