Muscle & recovery
PEG-MGF, simplified.
Also called Pegylated mechano growth factor
Early researchMGF with a polymer called PEG attached so it lasts longer in the body. The evidence is the same thin animal and lab data as MGF.
- Size
- 24 amino acids + PEG
- How it is taken
- Injection
- Status
- Research compound
- Available sizes
- Vials: 2 mg, 5 mg
What is it?
Plain MGF breaks down in minutes. Attaching PEG, a common trick in drug design, shields it so it can circulate longer.
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What studies show
- In animalsSmall animal studies looked at muscle and heart repair, with mixed results.
What we don’t know yet
- Effects and safety in people. There are no human trials.
Side effects and cautions
- No human safety data.
- Banned in sport by WADA.
Is it legal?
Not FDA-approved for human use.
Dosage & schedule evidence
How to read published schedules
Third-party protocols are not established clinical dosing standards. Safe human dose, frequency, and duration may be unknown.
| Measurement | Meaning |
|---|---|
| 1 mg | 1,000 mcg (mass) |
| 100 U-100 units | 1 mL (volume, not dose) |
See third-party published protocols ↗ for research context. North Star does not validate these schedules.
Consult your doctor before considering any peptide for personal use. Educational only, not administration guidance.
Common questions
What is PEG-MGF?
MGF with a polymer called PEG attached so it lasts longer in the body. The evidence is the same thin animal and lab data as MGF. Plain MGF breaks down in minutes. Attaching PEG, a common trick in drug design, shields it so it can circulate longer.
What does the research say about PEG-MGF?
Small animal studies looked at muscle and heart repair, with mixed results.
Is PEG-MGF FDA approved?
Not FDA-approved for human use.
What are the side effects of PEG-MGF?
No human safety data. Banned in sport by WADA.
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This page explains published research in plain language. It is not medical advice, a diagnosis, or a recommendation to take anything, and it does not give dosing. Most peptides here are not FDA-approved, and products sold online vary widely in purity. Rules around peptides are changing, so check the current status and talk with a licensed clinician before starting anything. Last reviewed 2026-10-19.