MGF / PEG-MGF
A splice variant of IGF-1 made in stressed muscle that activates muscle stem cells; PEG-MGF is a longer-lasting form.
Not approved for human use; sold as a research chemical.
Used for
- Muscle repair and growth after training
- Injury recovery
How it works
Its unique end piece is thought to activate satellite (stem) cells after muscle damage, separately from mature IGF-1.
What the research shows
- Cell and animal studies only; even its separate role from IGF-1 is debated (Matheny 2010).
Dosing
Dosing isn’t listed on the public site. In the app, each published option is shown with its source (a drug label, a clinical guideline, a trial or community reports) and can be turned into a protocol you review.
Work out the units to draw for your vial →Side effects
- Injection-site reactions
- Low blood sugar
Cautions
- Growth-factor signaling: avoid with cancer.
- Prohibited in tested sports (WADA).
- Research-chemical vials have no quality control: purity, dose and sterility vary. Third-party testing helps but is no guarantee.
Storage
Unmixed powder: freezer or fridge, away from light.
Once mixed with bacteriostatic water: fridge; the common rule is to use it within 28 days.
There is no label or published stability data for this one, so treat these as habits, not limits.
More in Muscle
Reference only, not medical advice. Written for this app from the cited research. Doses marked community-reported are not from trials.