PEG-MGF (2 mg Vial) Dosage Protocol
PEG-MGF is a PEGylated form of mechano-growth factor (a splice variant of IGF-1Ec) studied for satellite cell activation and skeletal muscle repair. PEGylation extends half-life from minutes to days.
⚡ Quickstart Highlights
Dosing & Reconstitution Guide
Route: Subcutaneous | Frequency: Once daily | Half-life: ~24 hours (PEGylated)
Standard Approach (3 mL = 0.67 mg/mL)
Reconstituting with 3 mL bacteriostatic water produces a concentration of 0.67 mg/mL. Volume per dose changes with concentration; mg dose itself does not change between vial sizes.
| Phase / Protocol | Dose | U-100 Units | Volume | Doses per vial |
|---|---|---|---|---|
| Weeks 1–2 (titration) | 200 mcg | 30.0 units | 0.30 mL | 10 doses |
| Weeks 3–4 | 300 mcg | 45 units | 0.45 mL | 6 doses |
| Weeks 5–6 | 400 mcg | 60.0 units | 0.60 mL | 5 doses |
| Weeks 7–8 (target) | 500 mcg | 75 units | 0.75 mL | 4 doses |
Reconstitution Steps
- Wipe the vial stopper and BAC water vial with alcohol; let dry.
- Draw 3 mL of bacteriostatic water into a sterile syringe.
- Inject slowly down the inside glass wall of the peptide vial. Do not aim at the powder.
- Gently swirl until fully dissolved. Do not shake.
- Label with reconstitution date. Refrigerate at 2–8°C; use within 28 days.
Supplies Needed
Estimates for an 8-week and 12-week cycle at 400 mcg per dose, once daily (7 doses/week).
| Item | 8-Week Cycle | 12-Week Cycle |
|---|---|---|
| PEG-MGF (2 mg) vials | 12 vials | 17 vials |
| Insulin syringes (U-100) | 56 | 84 |
| Bacteriostatic water (10 mL) | 4 × 10 mL | 6 × 10 mL |
| Alcohol swabs | 1 × 100-pack | 2 × 100-pack |
Protocol Overview
PEG-MGF (PEGylated mechano-growth factor) provides muscle-specific repair signaling rather than systemic GH/IGF-1 elevation. The PEGylation extends the half-life from ~minutes (native MGF) to ~24 hours, enabling weekly dosing protocols.
Most-cited research use is post-training to amplify muscle satellite cell activation during the recovery window. Twice-weekly dosing during active training cycles, then break.
Dosing Protocol
Twice-weekly schedule:
- Light (100 mcg, 2×/week): Conservative dose.
- Standard (200 mcg, 2×/week): Most-cited research dose.
- Higher (300 mcg, 2×/week): Heavy training / acute injury research.
Timing: Inject within 1 hour post-training to leverage the satellite cell activation window. Sub-Q or IM near target muscle group.
Cycle: 8–12 weeks active training cycle, then 4-week break.
Storage Instructions
| State | Temperature | Duration |
|---|---|---|
| Lyophilized | −20°C (−4°F) | Up to 24 months, dry & dark |
| Reconstituted | 2–8°C (35–46°F) | Up to 28 days, protect from light |
Important Notes
How This Works
Mechano-growth factor (MGF) is a splice variant of insulin-like growth factor-1 (IGF-1Ec) produced in skeletal muscle in response to mechanical loading. It activates satellite cells — muscle stem cells responsible for hypertrophy and repair after damage.
PEGylation (attachment of polyethylene glycol) extends MGF's half-life from minutes (native) to ~24 hours, enabling weekly dosing protocols for muscle repair research.
Potential Benefits & Side Effects
Potential Benefits
- Satellite cell activation and proliferation.
- Promotes skeletal muscle repair after damage.
- Studied in muscular dystrophy and aging models.
- Cardioprotective effects in some models.
Side Effect Profile
- Generally well-tolerated in available research.
- Mild injection-site reactions possible.
- Theoretical IGF-related concerns at supraphysiologic doses.
Lifestyle Factors
- Pair with resistance training for muscle-repair outcomes.
- Adequate protein intake (1.2–1.6 g/kg/day).
- Sleep 7–9 hours/night.
Injection Technique
- Subcutaneous or intramuscular near target muscle.
- Rotate sites if dosing twice weekly.
- 90° angle with short insulin needle.