Muscle growth and recovery: community-reported use
Community
Community-reported use; evidence for other MGF interventions does not establish the effects of PEG-MGF.3
Hormonal
PEG-MGF
PEGylated MGF has a distinct evidence gap
Investigational; this profile does not establish an approved use.
What does it do?
Amino-acid sequence
- Tyr
- Gln
- Pro
- Pro
- Ser
- Thr
- Asn
- Lys
- Asn
- Thr
- Lys
- Ser
- Gln
- Arg
- Arg
- Lys
- Gly
- Ser
- Thr
- Phe
- Glu
- Glu
- His
- Lys
24 residues · N → C19
Reference identity · not independently confirmed19
Length24 amino acids (C-terminal E-peptide)
Molecular weight · Da~2,888 Da (MGF-24aa E-peptide)
YQPPSTNKNTKSQRRKGSTFEEHKIdentity reported by Pep-Pedia; exact-product sequence and modifications have not been independently confirmed.
Sequence and formulation must be confirmed for the exact material; similarly named products are not necessarily interchangeable.
Pharmacokinetics
Reported half-lifeHuman kinetics not established2
No numerical human elimination estimate is assigned from animal experiments, related molecules, or an unsupported website estimate.
No numerical estimate was found in the checked data or Pep-Pedia profile. A curve would require an unsupported assumption.
What to expect
Study outcomes
Scope of evidence
No verified human PEG-MGF exposure trial defines safe dosing or clearance.1
Reported timelines
Reference & communitySource expectations
Soreness 1–2 weeks; recovery 2–4; repair 4–8; post-cycle persistence is unverified.19
These are reported timelines, not a prediction of your response.
Doses & schedules
Route
Scroll to compare all columns →
| Route | Dose | Frequency | Goal / evidence | Duration | References |
|---|---|---|---|---|---|
| SubQSubcutaneous | 200 mcg | 2-3 times weekly | General Recovery ProtocolReference report | 4-8 weeks | 19 |
Population Population not independently verified; see the reference and linked research. Context Reported in Pep-Pedia’s educational protocol table. Study attribution and applicability to this exact product are not independently established. Cell/animal MGF findings are not proof of injectable PEG-MGF benefits. Interaction labels do not establish safety. Source route wording SubQ or IM Source tabs Injectable | |||||
| IMIntramuscular | 200 mcg | 2-3 times weekly | General Recovery ProtocolReference report | 4-8 weeks | 19 |
Population Population not independently verified; see the reference and linked research. Context Reported in Pep-Pedia’s educational protocol table. Study attribution and applicability to this exact product are not independently established. Cell/animal MGF findings are not proof of injectable PEG-MGF benefits. Interaction labels do not establish safety. Source route wording SubQ or IM Source tabs Injectable | |||||
| IMIM (bilateral, near target muscle) | 200-400 mcg | Post-workout, 2-3 times weekly | Targeted Muscle RecoveryReference report | 4-8 weeks | 19 |
Population Population not independently verified; see the reference and linked research. Context Reported in Pep-Pedia’s educational protocol table. Study attribution and applicability to this exact product are not independently established. Cell/animal MGF findings are not proof of injectable PEG-MGF benefits. Interaction labels do not establish safety. Source tabs Injectable | |||||
| IMIM near injury site | 200-400 mcg | 2-3 times weekly | Injury Recovery ProtocolReference report | 4-8 weeks | 19 |
Population Population not independently verified; see the reference and linked research. Context Reported in Pep-Pedia’s educational protocol table. Study attribution and applicability to this exact product are not independently established. Cell/animal MGF findings are not proof of injectable PEG-MGF benefits. Interaction labels do not establish safety. Source tabs Injectable | |||||
| SubQ | 100-200 mcg | 2 times weekly | Conservative Research ProtocolReference report | 4-8 weeks | 19 |
Population Population not independently verified; see the reference and linked research. Context Reported in Pep-Pedia’s educational protocol table. Study attribution and applicability to this exact product are not independently established. Cell/animal MGF findings are not proof of injectable PEG-MGF benefits. Interaction labels do not establish safety. Source tabs Injectable | |||||
No protocols match these filters.
Study and label doses retain their study context. Reference reports are unvalidated practices, not personal treatment instructions. Ranges remain ranges; escalation stages are labeled.
Reported use periods and breaks. These do not establish a safe cycle or prove that breaks prevent tolerance.
Injectable
- Use period
- 4-8 weeks
- Break
- 4-8 weeks off between cycles to prevent receptor desensitization
Reported timing
Post-workout or post-training for muscle applications
Side effects & safety
Evidence boundary
No verified human PEG-MGF exposure trial defines safe dosing or clearance.
1Formulation boundary
Observations for the studied material do not establish safety of other routes or supplier products.
1Immunogenicity and impurities
FDA flags potential immunogenicity and difficulties characterizing peptide-related impurities.
2Growth risks
Source flags malignancy history, abnormal growths, cell-reserve depletion and age-dependent responses.
Stop symptoms
Lumps, edema, severe local reactions, headache/vision changes, hypoglycemia signs or infection.
Unknowns
Long-term and pregnancy/breastfeeding safety unknown.
Not a complete safety screen. Discuss health decisions with a qualified clinician.
Combinations & interactions
9 entriesCheck cautions and reported pairings. A compatibility claim does not establish that a combination is safe.
IGF-1 LR3
Caution reportedOverlapping growth pathways.19
Reference report · Pep-Pedia label: Use CautionHGH
Caution reportedGrowth/edema concerns.19
Reference report · Evidence context: Monitor combinationCJC-1295 / Ipamorelin
Caution reportedGH-axis overlap.19
Reference report · Pep-Pedia label: Monitor CombinationMK-677
Caution reportedIGF-axis overlap.19
Reference report · Pep-Pedia label: Monitor CombinationInsulin
Caution reportedGlucose concerns.19
Reference report · Pep-Pedia label: Use CautionBPC-157
Unverified pairingUnproven repair stack.19
Reference report · Pep-Pedia label: SynergisticTB-500
Unverified pairingUnproven repair stack.19
Reference report · Pep-Pedia label: SynergisticThymosin Beta-4
Unverified pairingUnproven repair stack.19
Reference report · Pep-Pedia label: SynergisticOther peptides and medicines
Not establishedA controlled interaction assessment for this exact compound and formulation was not identified in the sources checked. Absence of interaction data is not evidence of compatibility.3
Research contextNo matching interactions. Try another name or filter.
Reconstitution
A product-specific preparation or sterility protocol has not been verified.3
Dilution
A concentration calculation cannot establish a suitable diluent, compatibility, storage interval, or sterility. No universal bacteriostatic-water volume is assigned.3
Reference preparation details
Reported handling information, not a validated formulation or instruction to prepare an injectable product.
Injectable
Pep-Pedia favors 0.6% acetic acid but also mentions BAC water.
- Solvents mentioned
- 0.6% acetic acid / Bacteriostatic water — source alternative
- Reported parameters
- Example: 2 mL for a stated 1 mg/mL concentration. · Reported storage: 2–8°C, protected from light.
The source describes gentle mixing and avoiding vigorous shaking.
Its longer-stability claim for acetic acid is not an independently verified product specification.
Appearance & documentation
Appearance and a purity certificate cannot establish sterility, identity, or suitability for injection.
Reported appearanceWhite Lyophilized PowderReported appearanceClear After ReconstitutionReported variationMinor Clumping AcceptableReported concernCollapsed or DiscoloredReported concernCloudy or ParticlesReported appearanceCertificate of Analysis
19Available forms
No verified packaging examples included.
Packaging examples, not a market survey. Approved and research products are not interchangeable.
Storage after mixing
Reconstituted research vials
Pep-Pedia reports these handling limits after mixing. They are not validated stability or sterility limits for your vial.
Storage notes
19Lyophilized: room temperature stable. Reconstituted: refrigerate 2-8°C, use within 3-4 weeks
Storage depends on the formulation, diluent, container, and handling. Follow the specific product label or pharmacist’s instructions.
Evidence limits
View findings →No verified human PEG-MGF exposure trial defines safe dosing or clearance.1
2 distinct primary sources or abstracts checked. Evidence may concern a parent compound, individual blend ingredient, animal, or cell model; it does not necessarily establish a benefit for this exact product.
Evidence definitions →Research findings
No human data verifiedSource context
Cell/animal MGF findings are not proof of injectable PEG-MGF benefits. Interaction labels do not establish safety.
Compound identity & other names
PEG-MGF is marketed as a PEG-conjugated MGF peptide. Endogenous IGF-1 splicing, gene overexpression and unmodified E-peptide experiments do not establish the activity or clearance of a commercial PEG-MGF product.
Other names: Pegylated mechano growth factor
Investigational; this profile does not establish an approved use.
PEG-modified MGF-related E-peptide; PEG size, attachment and peptide sequence require exact characterization119
Pep-Pedia identity record
24 amino acids (C-terminal E-peptide) · ~2,888 Da (MGF-24aa E-peptide)
YQPPSTNKNTKSQRRKGSTFEEHKReference description; checked chemical identity takes precedence when available.19
How it may work
MGF-related signaling is studied in satellite-cell proliferation and repair; extrapolation to marketed PEG-MGF is uncertain.19
A replication challenge for MGF
A two-laboratory study found no proliferative effect of MGF peptide in human and mouse muscle-cell systems. This was not a human PEG-MGF trial.
1Research areas and evidence gaps
- No verified human PEG-MGF exposure trial defines safe dosing or clearance.
- The evidence does not validate the identity, purity or handling of a separately sourced research product.
Additional uses listed by Pep-Pedia
Muscle. Satellite activation, cell senescence, fusion and exercise/injury recovery.19
Tissue repair. Tendon, bone, cartilage and inflammation-resolution research.19
Neural / cells. Oxidative injury, neuronal adaptation and precursor-cell transplantation models.19
Community reports Unvalidated
Pep-Pedia reports use in the research-peptide community. These reports are not clinical evidence.3
Community protocol tables are unvalidated descriptions, not treatment instructions.
Search coverage and review status
Additional recent evidence was checked, including FDA: bulk substances with potential significant safety risks. See individual source summaries for findings and limitations.
- Checked
- 2026-10-12
- Search
- PEG-MGF 2025 2026 study; PEG-MGF primary study muscle PEGylated mechanogrowth factor; Mechano-growth factor peptide has no apparent effect
- Catalog
- Pep-Pedia ↗ · 15 listed references retained
- Targeted search, not a systematic or exhaustive review.
- Retained bibliography entries marked Bibliography only have not been independently verified.
- Distinct URLs may refer to the same publication; component and formulation boundaries remain important.
AI-prepared summaries. Independent medical editorial review is pending.
Community poll 10 topics · Pep-Pedia snapshot
Voluntary, unverified reports. These percentages do not measure effectiveness or safety.
Experience
Number of responses to this question: not disclosed.
Duration of use
Number of responses to this question: not disclosed.
Age range
Number of responses to this question: not disclosed.
Gender
Number of responses to this question: not disclosed.
Primary goal
Number of responses to this question: not disclosed.
Effectiveness
Number of responses to this question: not disclosed.
Side effects
Number of responses to this question: not disclosed.
Dosage frequency
Number of responses to this question: not disclosed.
Would recommend
Number of responses to this question: not disclosed.
How discovered
Number of responses to this question: not disclosed.
Source & limitations
The source displays “53 responses” for this profile. This is not a confirmed participant count or a denominator for individual questions.
- Voluntary self-reports from Pep-Pedia visitors; identity, treatment, outcomes and timing are unverified. These data are not efficacy or safety estimates.
- The source displays a profile-wide response label, not a confirmed unique participant count. It stays unchanged across questions. Question-specific denominators and absolute option counts are not exposed.
- Only the top five categories are displayed for some questions. Extra categories are retained as an undisplayed-category count; their labels and percentages are unavailable.
- Displayed percentages are rounded. They may not total 100%, especially where categories are hidden.
- This is a dated snapshot, not a live survey or current recommendation.
References
Original sources and review status. Open a reference to read its summary.
1Mechano-growth factor peptide has no apparent effect on myoblasts or primary muscle stem cellsAbstract checked
AI-PREPARED SUMMARY
MGF peptide failed to reproduce proposed proliferative effects in tested muscle-cell systems at up to 500 ng/mL.
A replication challenge for MGF
A two-laboratory study found no proliferative effect of MGF peptide in human and mouse muscle-cell systems. This was not a human PEG-MGF trial.
Additional research · Checked 2026-10-12
2FDA: bulk substances with potential significant safety risksPrimary source checked
AI-PREPARED SUMMARY
FDA identifies immunogenicity and characterization concerns for PEG-MGF and reports no identified human exposure data for drug products containing it.
Additional research · Checked 2026-10-12
3Pep-Pedia: PEG-MGFCommunity source checked
AI-PREPARED SUMMARY
Secondary community overview checked on 12 October 2026. Its practice tables and efficacy claims are not independently validated clinical guidance.
4Doroudian G, Bhomia M, Bhala M, et al. (2018). Overexpression of Mechano-Growth Factor Modulates Inflammatory Cytokine Expression and Macrophage Resolution in Skeletal Muscle Injury. Frontiers in Physiology, 9, 999.Pep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY
Pep-Pedia reports: MGF overexpression altered macrophage/cytokine responses after mouse muscle injury; it did not test a commercial PEG-MGF injection.
Reported population / model
Mouse muscle injury model
Reported study details
MGF overexpression · 14 days · Macrophage analysis
Reported by Pep-Pedia; the linked publication, design, doses and result have not been independently verified here.
Read the Pep-Pedia report ↗Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12
5MGF-E Peptide Human Muscle Cell Study (Kandalla et al., 2011)Pep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY
Pep-Pedia reports: MGF-E stimulated human satellite cells in culture; prolonged replication occurred in young but not 73-year-donor cells, and PEGylation was not the intervention.
Reported population / model
Human satellite cells
Reported study details
In vitro · Neonatal, 15yr, 73yr donors · Doses: 3-100ng/ml
Reported by Pep-Pedia; the linked publication, design, doses and result have not been independently verified here.
Read the Pep-Pedia report ↗Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12
6Human Myoblast Migration & Transplantation (Mills et al., 2007)Pep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY
Pep-Pedia reports: An MGF-E sequence improved migration/transplantation of human precursor cells in an experimental setting; human-cell origin does not make this a patient trial.
Reported population / model
Human cells
Reported study details
In vivo · MGF-24aa-E peptide · Cell transplantation
Pep-Pedia supplies no original study link for this card. Study identity, design, doses and result remain unverified.
Read the Pep-Pedia report ↗Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12
7MGF Neuroprotection Study (Dluzniewska et al., 2005)Pep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY
Pep-Pedia reports: MGF protected neuronal tissue against oxidative injury in laboratory models; equivalence to PEG-MGF is unestablished.
Reported population / model
Neuronal tissue
Reported study details
MGF treatment · Oxidative stress model · Cell survival
Pep-Pedia supplies no original study link for this card. Study identity, design, doses and result remain unverified.
Read the Pep-Pedia report ↗Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12
8Rat Disc Degeneration ModelPep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY
Pep-Pedia reports: The source claims slower muscle wasting in a rat disc-degeneration model; no original study link is supplied.
Reported population / model
Rats
Reported study details
PEG-MGF supplementation · Mechanical disc degeneration · Muscle wasting outcome
Pep-Pedia supplies no original study link for this card. Study identity, design, doses and result remain unverified.
Read the Pep-Pedia report ↗Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12
9Achilles Tendon Healing StudyPep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY
Pep-Pedia reports: Better rat tendon healing is claimed without an original study link or quantitative effect estimate.
Reported population / model
Rats
Reported study details
PEG-MGF treatment · Tendon injury model · Healing assessment
Pep-Pedia supplies no original study link for this card. Study identity, design, doses and result remain unverified.
Read the Pep-Pedia report ↗Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12
10Rabbit Bone Regeneration StudyPep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY
Pep-Pedia reports: The source claims faster bone repair through osteoblast effects in rabbits; the underlying study is unlinked.
Reported population / model
Rabbits
Reported study details
PEG-MGF treatment · Bone injury model · Osteoblast regulation
Pep-Pedia supplies no original study link for this card. Study identity, design, doses and result remain unverified.
Read the Pep-Pedia report ↗Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12
11Articular Cartilage Repair StudyPep-Pedia report · Primary source not checked
AI-PREPARED SUMMARY
Pep-Pedia reports: Improved rabbit cartilage repair is claimed; dose, quantified effect and an original study link are absent.
Reported population / model
Rabbits
Reported study details
PEG-MGF treatment · Cartilage injury model · Repair assessment
Pep-Pedia supplies no original study link for this card. Study identity, design, doses and result remain unverified.
Read the Pep-Pedia report ↗Pep-Pedia reference card; original summary of its reported findings · Checked 2026-10-12
12Kandalla PK, Goldspink G, Butler-Browne G, Mouly V (2011). 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. Mechanisms of Ageing and Development, 132(4), 154-162.Linked reference · Not independently reviewed
REFERENCE NOTE
Reference retained from Pep-Pedia’s bibliography. The original source and the website’s description have not been independently verified; the listed title may not match the linked record.
Pep-Pedia bibliography · Checked 2026-10-12
13Matheny RW Jr, Nindl BC, Adamo ML (2010). Minireview: Mechano-Growth Factor: A Putative Product of IGF-I Gene Expression Involved in Tissue Repair and Regeneration. Endocrinology, 151(3), 865-875.Linked reference · Not independently reviewed
REFERENCE NOTE
Reference retained from Pep-Pedia’s bibliography. The original source and the website’s description have not been independently verified; the listed title may not match the linked record.
Pep-Pedia bibliography · Checked 2026-10-12
14Philippou A, Papageorgiou E, Bogdanis G, et al. (2012). Mechano-Growth Factor: an important cog or a loose screw in the repair machinery?. Frontiers in Endocrinology, 3, 131.Linked reference · Not independently reviewed
REFERENCE NOTE
Reference retained from Pep-Pedia’s bibliography. The original source and the website’s description have not been independently verified; the listed title may not match the linked record.
Pep-Pedia bibliography · Checked 2026-10-12
15Kandalla PK, Goldspink G, Butler-Browne G, Mouly V (2011). 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. Mechanisms of Ageing and Development, 132(4), 154-162.Linked reference · Not independently reviewed
REFERENCE NOTE
Reference retained from Pep-Pedia’s bibliography. The original source and the website’s description have not been independently verified; the listed title may not match the linked record.
Pep-Pedia bibliography · Checked 2026-10-12
16Doroudian G, Bhomia M, Bhala M, et al. (2018). Overexpression of Mechano-Growth Factor Modulates Inflammatory Cytokine Expression and Macrophage Resolution in Skeletal Muscle Injury. Frontiers in Physiology, 9, 999.Linked reference · Not independently reviewed
REFERENCE NOTE
Reference retained from Pep-Pedia’s bibliography. The original source and the website’s description have not been independently verified; the listed title may not match the linked record.
Pep-Pedia bibliography · Checked 2026-10-12
17Matheny RW Jr, Nindl BC, Adamo ML (2010). Minireview: Mechano-Growth Factor: A Putative Product of IGF-I Gene Expression Involved in Tissue Repair and Regeneration. Endocrinology, 151(3), 865-875.Linked reference · Not independently reviewed
REFERENCE NOTE
Reference retained from Pep-Pedia’s bibliography. The original source and the website’s description have not been independently verified; the listed title may not match the linked record.
Pep-Pedia bibliography · Checked 2026-10-12
18Philippou A, Papageorgiou E, Bogdanis G, et al. (2012). Mechano-Growth Factor: an important cog or a loose screw in the repair machinery?. Frontiers in Endocrinology, 3, 131.Linked reference · Not independently reviewed
REFERENCE NOTE
Reference retained from Pep-Pedia’s bibliography. The original source and the website’s description have not been independently verified; the listed title may not match the linked record.
Pep-Pedia bibliography · Checked 2026-10-12
19Pep-Pedia: PEG-MGF — route-specific referenceReference page checked; underlying claims require separate verification.Community source checked
AI-PREPARED SUMMARY
Source page checked across available routes. Protocols, cycles, storage, mechanisms and pairing claims are secondary reports; checking the page does not independently validate those claims. Original concise summaries are used here.
Content coverage audit · Checked 2026-10-12