MGF (Mechano Growth Factor) and PEG-MGF
Peptide from the E domain of the IGF-1Ec splice variant (MGF); PEG-MGF is a pegylated form; cell studies only; FDA: no human exposure data for PEG-MGF; WADA S2.3.
60-Second Scientific Briefing
MGF (mechano growth factor) is a peptide from the unique E domain of IGF-1Ec, a form of IGF-1 produced by muscle after mechanical load; PEG-MGF is a pegylated version made to last longer. Evidence comes from cell and animal studies; no human trial of MGF or PEG-MGF has been published. Not approved by the US FDA or any other regulator; it is a research compound.
What is MGF (Mechano Growth Factor) and PEG-MGF?
Pharmacological Classification & Molecular IdentityMGF (mechano growth factor) is a peptide from the unique E domain of IGF-1Ec, a form of IGF-1 produced by muscle after mechanical load; PEG-MGF is a pegylated version made to last longer. [1] Mech Ageing Dev, 2011 ↗
Verified Chemical & Regulatory Registry Identifiers
Mechanism of Action & Receptor Targets
Biological Pathway and Target BindingReceptor Selectivity: In cultured human muscle cells, the MGF E peptide increased the proliferation and lifespan of muscle progenitor (satellite) cells from young but not old donors. [1] Mech Ageing Dev, 2011 ↗
Regulatory & FDA Approval Status
Legal and Regulatory ClassificationsNot approved by the US FDA or any other regulator; it is a research compound. [1] U.S. Food and Drug Administration, 2026 ↗ [2] World Anti-Doping Agency, 2024 ↗
MGF (Mechano Growth Factor) and PEG-MGF is not approved for commercial sale, prescription therapy, or compounded medication distribution. It exists strictly within authorized scientific and clinical research frameworks.
Human Evidence & Clinical Trials
Clinical Study Readouts and Evidence SynthesesNo human clinical trial has been published. Mech Ageing Dev 2011: the MGF-24aa-E peptide increased the proliferative lifespan and delayed senescence of satellite cells from neonatal and young adult muscle, but not from old adult muscle, in primary human muscle cultures. Human studies of "MGF" in exercise science measure the body's own IGF-1Ec gene expression, not the administered peptide. [1] Mech Ageing Dev, 2011 ↗
Clinical Evidence
No human clinical trial has been published. Mech Ageing Dev 2011: the MGF-24aa-E peptide increased the proliferative lifespan and delayed senescence of satellite cells from neonatal and young adult muscle, but not from old adult muscle, in primary human muscle cultures. Human studies of "MGF" in exercise science measure the body's own IGF-1Ec gene expression, not the administered peptide.
Safety Profile & Clinical Limitations
Documented Adverse Events and Known UncertaintiesThere are no human safety data. The FDA states that there are no human exposure data for pegylated MGF and cites immunogenicity concerns. [1] U.S. Food and Drug Administration, 2026 ↗
Effects and safety in people are unknown, as are the long-term effects of stimulating growth pathways and the quality of non-pharmaceutical material. [1] U.S. Food and Drug Administration, 2026 ↗ [2] Mech Ageing Dev, 2011 ↗
Dose Approval Status
Commercial Dosing Status and Policy DirectivesNo dose is approved or established for humans, and no human dose-finding study has been published. [1] Mech Ageing Dev, 2011 ↗
Under Egypt Peptides medical governance policies, no personal dosages, titration intervals, cycles, stacking recommendations, or self-injection instructions may be provided for unapproved investigational compounds. Clinical study protocols represent controlled experimental research parameters exclusively.
What is Known vs. What is Unknown
Evidence Comparison and Clinical Evidence Boundaries✓ Confirmed Scientific Evidence
- MGF (mechano growth factor) is a peptide from the unique E domain of IGF-1Ec, a form of IGF-1 produced by muscle after mechanical load; PEG-MGF is a pegylated version made to last longer.
- Targets & Selectivity: In cultured human muscle cells, the MGF E peptide increased the proliferation and lifespan of muscle progenitor (satellite) cells from young but not old donors.
- No human clinical trial has been published. Mech Ageing Dev 2011: the MGF-24aa-E peptide increased the proliferative lifespan and delayed senescence of satellite cells from neonatal and young adult muscle, but not from old adult muscle, in primary human muscle cultures. Human studies of "MGF" in exercise science measure the body's own IGF-1Ec gene expression, not the administered peptide.
- Safety considerations: There are no human safety data. The FDA states that there are no human exposure data for pegylated MGF and cites immunogenicity concerns.
? Unknown / Under Ongoing Investigation
- Effects and safety in people are unknown, as are the long-term effects of stimulating growth pathways and the quality of non-pharmaceutical material.
Verified Questions & Answers
10 Verified scientific answers with permanent anchor keysMGF (mechano growth factor) is a peptide from the unique E domain of IGF-1Ec, a form of IGF-1 produced by muscle after mechanical load; PEG-MGF is a pegylated version made to last longer.
What is the mechanism of action and receptor profile of MGF (Mechano Growth Factor) and PEG-MGF?
§In cultured human muscle cells, the MGF E peptide increased the proliferation and lifespan of muscle progenitor (satellite) cells from young but not old donors.
No. Not approved by the US FDA or any other regulator; it is a research compound.
- Certain bulk drug substances for use in compounding that may present significant safety risks (U.S. Food and Drug Administration, 2026-04-22)
- The Prohibited List (World Anti-Doping Agency, 2024-01-01)
No human clinical trial has been published. Evidence comes from cell and animal studies; no human trial of MGF or PEG-MGF has been published.
No human clinical trial has been published. Mech Ageing Dev 2011: the MGF-24aa-E peptide increased the proliferative lifespan and delayed senescence of satellite cells from neonatal and young adult muscle, but not from old adult muscle, in primary human muscle cultures. Human studies of "MGF" in exercise science measure the body's own IGF-1Ec gene expression, not the administered peptide.
What adverse effects and safety risks are documented for MGF (Mechano Growth Factor) and PEG-MGF?
§There are no human safety data. The FDA states that there are no human exposure data for pegylated MGF and cites immunogenicity concerns.
- Certain bulk drug substances for use in compounding that may present significant safety risks (U.S. Food and Drug Administration, 2026-04-22)
What are the critical unknown safety aspects and clinical limitations of MGF (Mechano Growth Factor) and PEG-MGF?
§Effects and safety in people are unknown, as are the long-term effects of stimulating growth pathways and the quality of non-pharmaceutical material.
- Certain bulk drug substances for use in compounding that may present significant safety risks (U.S. Food and Drug Administration, 2026-04-22)
- Mechano Growth Factor E peptide (MGF-E), derived from an isoform of IGF-1, activates human muscle progenitor cells and increases their fusion potential at different ages (Mech Ageing Dev, 2011-03-01)
No dose is approved or established for humans, and no human dose-finding study has been published.
There is no approved product label, so no official storage instructions exist.
Yes. Mechano growth factors (MGFs) are named in section S2.3 (growth factors) of the 2026 WADA Prohibited List and are prohibited at all times.
- WADA Prohibited List (World Anti-Doping Agency)
What is Egypt Peptides' official medical policy regarding MGF (Mechano Growth Factor) and PEG-MGF?
§Egypt Peptides publishes reviewed scientific reference monographs for documentation and research. The site does not give individual medical advice, preparation or injection instructions, combination protocols or off-label use instructions. Decisions about any medicine belong to the treating physician.
Authoritative Sources & Literature Registry
Regulatory dossiers, clinical trial registries, and published studiesCertain bulk drug substances for use in compounding that may present significant safety risks ↗
https://www.fda.gov/drugs/human-drug-compounding/certain-bulk-drug-substances-use-compounding-may-present-significant-safety-risks
The Prohibited List ↗
https://www.wada-ama.org/en/prohibited-list
Mechano Growth Factor E peptide (MGF-E), derived from an isoform of IGF-1, activates human muscle progenitor cells and increases their fusion potential at different ages ↗
https://pubmed.ncbi.nlm.nih.gov/21354439/