Skip to content

PEG-MGF

A PEGylated version of MGF with extended half-life for systemic muscle growth and recovery effects.

PreliminaryLimited Data

Always consult a qualified clinician

This information is for educational purposes. Peptide therapy should be guided by a licensed healthcare provider. Connect with a Noho clinician

What is PEG-MGF?

PEG-MGF is a PEGylated form of Mechano Growth Factor where a polyethylene glycol molecule is attached to increase stability and extend the half-life from minutes to several hours. This allows systemic distribution and longer-lasting effects compared to standard MGF, though it may sacrifice some of the localized potency.

Why People Talk About It

Systemic muscle growth and recovery via satellite cell activation

Preliminary

Extended half-life compared to native MGF (hours vs minutes)

Preliminary

Anti-inflammatory and tissue-protective effects in muscle injury

Preliminary

Potential cardioprotective and neuroprotective properties

Preliminary

How It Works

PEG-MGF is a longer-lasting version of the muscle repair signal MGF. The PEG coating protects it from breakdown, allowing it to circulate throughout the body and support muscle recovery systemically rather than just locally.

Common Questions

Safety Information

Important Safety Notes

Common Side Effects

Injection site reactionsMild swellingFatigue

Cautions

  • Not FDA-approved
  • Very limited human data
  • PEGylation may alter receptor-binding potency while extending duration
  • Long-term effects unknown
  • Listed as prohibited substance by WADA

What We Don't Know

Human safety and efficacy data are essentially nonexistent for PEG-MGF specifically. One study found MGF E-peptide alone had no apparent effect on myoblasts in isolation, raising questions about the mechanism. PEGylation effects on MGF bioactivity and receptor interactions need further characterization.

Published Research

16 studies

Mechano-Growth Factor: an important cog or a loose screw in the repair machinery?

ReviewPMID: 23125840

Impairment of IGF-I gene splicing and MGF expression associated with muscle wasting.

ReviewPMID: 16463438

The role of mechano growth factor in chondrocytes and cartilage defects: a concise review.

ReviewPMID: 37171185

Age-related loss of muscle mass and strength.

ReviewPMID: 22506111

Mechano Growth Factor E peptide (MGF-E), derived from an isoform of IGF-1, activates human muscle progenitor cells and induces an increase in their fusion potential at different ages.

PreclinicalPMID: 21354439

Impaired Skeletal Muscle Regeneration Induced by Macrophage Depletion Could Be Partly Ameliorated by MGF Injection.

PreclinicalPMID: 31164836

Overexpression of Mechano-Growth Factor Modulates Inflammatory Cytokine Expression and Macrophage Resolution in Skeletal Muscle Injury.

PreclinicalPMID: 30140235

Mechano-growth factor, an IGF-I splice variant, rescues motoneurons and improves muscle function in SOD1(G93A) mice.

PreclinicalPMID: 19038252

A strong neuroprotective effect of the autonomous C-terminal peptide of IGF-1 Ec (MGF) in brain ischemia.

PreclinicalPMID: 16144956

Mechano-growth factor reduces loss of cardiac function in acute myocardial infarction.

PreclinicalPMID: 17581790

Localized delivery of mechano-growth factor E-domain peptide via polymeric microstructures improves cardiac function following myocardial infarction.

PreclinicalPMID: 25678113

Potency of Full-Length MGF to Induce Maximal Activation of the IGF-I R Is Similar to Recombinant Human IGF-I at High Equimolar Concentrations.

PreclinicalPMID: 26991004

Mechano-growth factor peptide, the COOH terminus of unprocessed insulin-like growth factor 1, has no apparent effect on myoblasts or primary muscle stem cells.

PreclinicalPMID: 24253050

First-in-man study with a novel PEGylated recombinant human insulin-like growth factor-I.

Randomized Controlled TrialPMID: 28110155

Effects of resistance training on expression of IGF-I splice variants in younger and older men.

Clinical StudyPMID: 27231807

Mass spectrometric characterization of a biotechnologically produced full-length mechano growth factor (MGF) relevant for doping controls.

PreclinicalPMID: 25466910

Always consult a qualified clinician

This information is for educational purposes. Peptide therapy should be guided by a licensed healthcare provider. Connect with a Noho clinician

Related Peptides

Quick Facts

Class
PEGylated Growth Factor
Evidence
Preliminary
Safety
Limited Data
Updated
Mar 2026
Citations
16PubMed

Also known as

PEGylated Mechano Growth FactorPEG-IGF-1Ec

Tags

Growth FactorMuscle GrowthRecovery

Related Goals

Evidence Score

Overall Confidence25%

Clinical Trials

View Clinical Trials

Links to ClinicalTrials.gov for reference. Listing does not imply endorsement.

Clinician Guided

Interested in this peptide? A Noho clinician can help determine if it's right for you.

Talk to a Clinician