PEG-MGF
Also known as Pegylated Mechano Growth Factor, PEGylated IGF-1Ec, Pegylated MGF
PEG-MGF is the pegylated (PEGylated) form of Mechano Growth Factor, a splice variant of IGF-1 produced locally in muscle after mechanical stress. The PEGylation dramatically extends its half-life from minutes to days, making it viable for systemic administration. It activates muscle satellite cells to drive hypertrophy and accelerate tissue repair.
How it works
MGF binds a unique receptor distinct from the IGF-1R, activating satellite cells (muscle stem cells) to proliferate and fuse with existing myofibers. This increases myonuclei density — a key driver of long-term hypertrophy. PEGylation adds polyethylene glycol chains that protect from enzymatic degradation, extending systemic activity.
Benefits
- Activates muscle satellite cells for enhanced hypertrophy and regeneration
- Accelerates recovery from muscle damage and injury
- Increases muscle fiber size and number
- Anti-inflammatory effects in damaged tissue
- Neuroprotective properties (satellite cell activation in neural tissue)
- Longer-lasting than non-pegylated MGF due to extended half-life
Dosing
200–400 mcg · 1–2x per week
Typically injected post-workout near the trained muscle group. Unlike non-PEGylated MGF, timing is less critical due to extended half-life.
Ranges reflect commonly cited research protocols, not a prescription. Dose with a licensed provider.
Reconstitution
Reconstitute 2mg vial with 2mL BAC water = 1mg/mL. Store reconstituted at 4°C.
Helix’s free reconstitution calculator gives you the exact draw volume → get the app
Common stacks
Reported side effects
- Potential hypoglycemia (monitor blood sugar)
- Injection site reactions
- Water retention
- Limited long-term safety data in humans
Who it’s for
Advanced athletes, bodybuilders, or those recovering from significant muscle injuries. Best deployed post-workout or post-injury. Not appropriate for beginners — requires understanding of timing and dosing.
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