PEG-MGF
Muscle Research only Animal studies
Also called Mechano Growth Factor, IGF-1Ec
A 24-amino-acid fragment from a splice variant of the IGF-1 gene that muscle produces after mechanical stress. A polyethylene glycol chain is attached to slow its breakdown. It is studied for activating satellite cells, the stem cells that repair and add muscle fibres.
Why people take it
What studies report
- Activated muscle satellite cells in culture
- Increased muscle fibre repair in rodent injury models
- Behaves differently from mature IGF-1 in cell studies
In practice Unapproved use
- Used post-workout, sometimes injected into the muscle group trained
Reported real-world use, not evidence and not a recommendation.
Worth knowing: Reviews note that no equivalent natural peptide has ever been isolated from cells, so the research material is synthetic and its physiological relevance is debated. No human trials.
Status: Research compound. Not approved.
- Route
- Subcutaneous injection, from reconstituted lyophilised powder
- Available as
- 5 mg
Educational information only. Nothing here is medical advice, a dosing protocol, or a recommendation to use any compound. Most entries describe substances not approved for human use. Talk to a licensed clinician before acting on anything you read here. How to read these entries.