NOT MEDICAL ADVICE

PEG-MGF

Estimated Market Price
$27 $90
Estimated for 2–5 mg · Based on verified supplier pricing
Extended half-life version of MGF for systemic muscle satellite cell activation. Sustained circulation supports whole-body recovery and repair.
How it works

Same satellite cell-activating action as MGF, but wrapped in a PEG shield that dramatically extends its life in the bloodstream. This allows systemic dosing instead of requiring injection directly into the muscle.

Performance

Recovery

What to Expect
Week 1 Systemic satellite cell activation via PEGylated delivery. General muscle recovery feels slightly improved.
Week 2–3 Extended half-life providing sustained muscle repair signaling. Less overall soreness; systemic recovery speeding up.
Week 4–5 Muscle recovery and growth across multiple muscle groups. Multiple muscle groups recovering faster; growth visible.
Week 6 Peak benefits; cycle completing for assessment period. Full-body recovery and growth response at its peak.

Verified Suppliers

For research purposes only. These suppliers have been independently verified by PepSpace. We do not process sales directly.

PepSpace is not affiliated with any listed supplier
Protocol & Dosage
Typical Dosage 200–400 mcg SC/IM, 2x weekly
Administration Subcutaneous injection, Intramuscular injection
Schedule Twice weekly (e.g., Mon/Thu), post-workout preferred
Protocol Duration 4–6 weeks
Half-Life 48–72 hours (PEGylation extends clearance)
Side Effects & Safety
Tolerability Profile Mild

Generally well tolerated; side effects are mild and transient

Common Side Effects

  • Injection site reactionmost users
  • Mild water retentionsome users

Less Common

  • Headacheoccasional
  • Fatigueoccasional
  • Joint discomfortoccasional
  • Mild nauseaoccasional

Discontinue If

  • Signs of abnormal tissue growth
  • Persistent swelling
  • Severe allergic reaction

Contraindications

  • Active cancer or tumors
  • Diabetes mellitus (unmonitored)
  • Pregnancy or breastfeeding

Data note: PEGylated version of MGF with extended half-life (~days vs minutes). Systemic rather than local effects. Limited human safety data.

Always consult a qualified healthcare professional before use. This information is for research reference only and does not constitute medical advice.

Ask about PEG-MGF
Send us a message

Call us
+1 (518) 327-4392
Business hours
Monday – Friday 9:00 AM – 6:00 PM EST
Saturday 10:00 AM – 2:00 PM EST
Sunday Closed

You can also reach us via or .

How to Apply

1

Gather

Peptide vial, BAC water, alcohol swabs, insulin syringe

2

Sanitize

Wipe tops of both vials with alcohol swabs

3

Draw

Pull 1–2 mL of BAC water into syringe

4

Add Water

Release water slowly along vial wall, not directly on powder

5

Swirl

Roll between palms until dissolved. Never shake.

6

Store

Refrigerate 2–8°C, use within 30 days

Frequently Asked Questions

Yes. Bacteriostatic water (BAC water) is required to reconstitute lyophilized (freeze-dried) peptides. It contains 0.9% benzyl alcohol which prevents bacterial growth, keeping your reconstituted peptide safe for multiple uses over up to 30 days.

Unreconstituted: store at -20°C (freezer) for long-term, or 2–8°C (fridge) for short-term. After reconstitution: always refrigerate at 2–8°C and use within 30 days. Keep away from direct sunlight.

Results vary by individual and protocol. In research settings, measurable effects are typically observed within 1–4 weeks depending on the specific peptide, dosage, and application. Consult a qualified professional for guidance.

Verified suppliers typically include a full third-party COA verifying purity (99%+), identity, and sterility. We recommend only sourcing from vendors that provide batch-specific testing data.

We list verified suppliers above that have been independently reviewed for product quality, testing transparency, and shipping reliability. Always verify COA data before sourcing.

Compound Profile

Scientific data & classification for PEG-MGF

Also Known As PEGylated MGF, PEG-MGF, PEGylated Mechano Growth Factor
Classification PEGylated Growth Factor · Muscle Repair
Sequence MGF peptide + polyethylene glycol chain
Molecular Formula PEGylated peptide
Molecular Weight Variable (depends on PEG size)
CAS Number N/A
Half-Life 48–72 hours (PEGylation extends clearance)
Origin PEGylated version of Mechano Growth Factor
Administration Subcutaneous injection, Intramuscular injection
Status Research compound
Mechanism of Action Same satellite cell-activating action as MGF, but wrapped in a PEG shield that dramatically extends its life in the bloodstream. This allows systemic dosing instead of requiring injection directly into the muscle.
Research Overview PEGylated Mechano Growth Factor (PEG-MGF) is a modified form of the MGF E-domain peptide conjugated to polyethylene glycol (PEG) chains through a process known as PEGylation - a widely used pharmaceutical engineering strategy for improving the pharmacokinetic properties of therapeutic peptides and proteins. The fundamental limitation of native MGF as a therapeutic agent is its extremely rapid enzymatic degradation in biological fluids, with a half-life of approximately 5-7 minutes that restricts its utility to localized intramuscular injection protocols requiring frequent dosing. PEGylation addresses this limitation by covalently attaching PEG polymers (typically 2-5 kDa) to the peptide backbone, creating a hydrophilic "shield" that sterically hinders access by proteolytic enzymes while also increasing the molecule's hydrodynamic radius to reduce renal filtration clearance. The resulting PEG-MGF construct maintains the biological activity of the parent peptide - satellite cell activation and proliferation - while extending the functional half-life to several days, enabling systemic administration via subcutaneous injection rather than requiring direct intramuscular delivery to the target tissue. This pharmacokinetic transformation has significant practical implications for research applications - while native MGF must be injected directly into or near the damaged muscle tissue to achieve effective local concentrations before degradation, PEG-MGF can circulate systemically and distribute to muscle tissues throughout the body. However, this broader distribution also means that PEG-MGF loses the site-specificity that characterizes native MGF's paracrine signaling mode, potentially activating satellite cells in undamaged muscles as well as injured ones. Research comparing PEGylated and non-PEGylated MGF has generally confirmed improved efficacy of the PEGylated form in systemic administration paradigms, though direct intramuscular injection of native MGF may still be preferred when targeted local effects are desired.

Citations

Published findings on PEG-MGF from peer-reviewed journals.

Research Assistant
Hey, I'm the PepSpace research assistant. Ask me anything about peptides and I'll do my best to help.