PEGMGF

PEG-MGF

Muscle HealingGrowth Hormone Preclinical (animal)

PEGylated version of MGF (mechano-growth factor). No published studies of PEG-MGF itself were found; the non-PEGylated MGF E-peptide has limited mouse data with mixed cardiac effects.

Regulatory status (as of Sept 2026)

Slated for PCAC review before end of Feb 2027. Not currently eligible for 503A compounding; not FDA-approved.

See the FDA peptide regulatory tracker · Read our July 27, 2026 dispatch on the FDA PCAC peptide vote
Educational summary. Every effect described below is drawn from the cited published research and describes what was observed in research subjects — not a promise of results, a dose recommendation, or an endorsement for human use. Many peptides are not FDA-approved. Consult a licensed healthcare provider before making any health decision. Full disclaimer.

2 studies referenced · Last reviewed Oct 1, 2026 · Reviewed by The Peptide Dispatch Editorial Team · How we research & label content

TL;DR — PEG-MGF at a Glance

PEG-MGF is a compound studied only in animals and lab experiments so far. PEGylated version of MGF (mechano-growth factor).

Half-lifeNot established in published research
How it's given in studiesSubcutaneous injection
Research stagePreclinical (animal)
Dosing
Published research: No published human dosing
detailsNo published studies of PEG-MGF. Non-PEGylated MGF E-domain peptides were given to mice at 2.25-9 mg/kg/day for 2 weeks (Solís 2022, cardiac function), with mixed and dose-dependent effects.
Community-reportedCommunity-reported: 200 mcg 2–3x per week, subcutaneous injection

Published-research dosing is what was given in the cited studies (species and units as reported). Community-reported dosing is what users describe, not from clinical studies. Neither is a recommendation. Not medical advice.

Where each point comes from: Clinicalhuman trials and FDA labels   Lab / animalrodent, cell and ex vivo studies   Community-reporteduser experience and commonly used protocols, not from clinical studies

How It Works

In plain terms: It is MGF with a chemical tail added to make it last longer in the blood; this has not been measured for PEG-MGF itself. Proposed mechanism: MGF with polyethylene glycol (PEG) attached, intended to extend circulation time. No pharmacokinetic study of PEG-MGF was found; PEGylation of a different molecule, IGF-I, extended its half-life to 140-200 h in a first-in-human study (Kletzl 2017).

Effects Reported in Research

How to read this: Each item below is an effect observed in research subjects in the cited studies — think of Dexter, our stand-in research subject. These are findings from the literature, not results you should expect, and not medical advice.

  • No published studies of PEG-MGF; MGF E-peptide has limited mouse data with mixed cardiac effects.

What Users Report (Community, Not Clinical)

Commonly reported protocol

Community-reportedIn user communities, PEG-MGF is typically run at 200 mcg 2–3x per week (subcutaneous injection). This is not a recommendation.

What users report

  • Community-reportedSystemic MGF effects
  • Community-reportedExtended half-life
  • Community-reportedMuscle growth
  • Community-reportedRecovery

Community reports are anecdotal, vary widely in product quality and purity, and are not medical advice. Talk to a licensed provider.

Side Effects and Safety Notes

  • No human safety data exist
  • Lab / animalMGF E-domain peptides depressed cardiac systolic/diastolic function at some doses in mice (Solís 2022)

References

  1. Mechano-growth factor E-domain modulates cardiac contractile function through 14-3-3 protein interactomes
    Solís C, Thompson WC, Peña JR, McDermott-Roe C, Langa P, Warren CM et al. Frontiers in physiology. 2022. PMID: 36467694.
    Study type: Mouse, 2.25-9 mg/kg/day x2 wk.
    DOI: 10.3389/fphys.2022.1028345 · PubMed
  2. First-in-man study with a novel PEGylated recombinant human insulin-like growth factor-I
    Kletzl H, Guenther A, Höflich A, Höflich C, Frystyk J, Staack RF et al. Growth hormone & IGF research : official journal of the Growth Hormone Research Society and the International IGF Research Society. 2017. PMID: 28110155.
    Study type: Human phase 1, PEG-IGF-I (not MGF).
    DOI: 10.1016/j.ghir.2017.01.001 · PubMed

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How PEG-MGF Compares

PeptideHalf-LifeRouteResearch Status
PEG-MGFNo published PK data foundSubcutaneous injectionPreclinical (animal)
ACE-031~12 daysSubcutaneous injectionDiscontinued
Follistatin 344UnknownSubcutaneous injectionPreclinical (animal)
IGF-1 DESNo published PK data found (des(1-3)IGF-I clears more rapidly than IGF-I in pigs/marmosets, but no published t1/2 value was found)Intramuscular (site-specific)Preclinical (animal)
IGF-1 LR3No published PK data foundSubcutaneous or intramuscularPreclinical (animal)

Values reflect figures reported in published research. Compare any peptides side-by-side →

Frequently Asked Questions

What is PEG-MGF?
PEGylated version of MGF (mechano-growth factor). No published studies of PEG-MGF itself were found; the non-PEGylated MGF E-peptide has limited mouse data with mixed cardiac effects.
How does PEG-MGF work?
In plain terms: It is MGF with a chemical tail added to make it last longer in the blood; this has not been measured for PEG-MGF itself. Proposed mechanism: MGF with polyethylene glycol (PEG) attached, intended to extend circulation time. No pharmacokinetic study of PEG-MGF was found; PEGylation of a different molecule, IGF-I, extended its half-life to 140-200 h in a first-in-human study (Kletzl 2017).
What is the research status of PEG-MGF?
PEG-MGF is at the following stage in the published literature: Preclinical (animal). All information is for research and educational purposes only.
What is the half-life of PEG-MGF?
Reported half-life: No published PK data found.
How is PEG-MGF administered in research?
Reported administration route in the literature: Subcutaneous injection. This is not a recommendation for human use.

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Category

This peptide belongs to the Muscle category. View All Muscle Peptides

Related Categories

Healing, Growth Hormone

Related Peptides

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Sources & Methodology

Dosing, half-life figures, and mechanism descriptions on this page are compiled from peer-reviewed published research, with the species and study type stated where reported. Figures labeled “Dosing used in published research” describe what was given in those studies and do not constitute dosing recommendations for any human use. Each cited paper is listed with DOI and PubMed links in the References section above. Found an error? Contact us.

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