MGF
Also known as: Mechano Growth Factor, IGF-1Ec, Mechano-Growth Factor
MGF (Mechano Growth Factor) is a splice variant of IGF-1 that forms in response to mechanical stress on muscle tissue. This peptide activates satellite cells and promotes muscle fiber repair and growth following exercise or injury.
MGF is a 2867.2 Da research peptide. MGF (Mechano Growth Factor) is a splice variant of IGF-1 that forms in response to mechanical stress on muscle tissue. This peptide activates satellite cells and promotes muscle fiber repair and growth following exercise or injury.
Also called: Mechano Growth Factor, IGF-1Ec, Mechano-Growth Factor
2867.2
Molecular Weight
Daltons
2
Strong Evidence
benefits
4
Studies Cited
peer-reviewed
100-200
Typical Dose
mcg
Overview
MGF represents a specialized form of insulin-like growth factor-1 (IGF-1) produced locally in muscle tissue when exposed to mechanical stress or damage. The peptide contains a unique C-terminal extension that allows it to bind to and activate satellite cells, which are crucial for muscle repair and growth. When muscle fibers experience mechanical tension during resistance training or sustain micro-damage, MGF expression increases rapidly to initiate the repair process. This localized response makes MGF particularly important for muscle adaptation and hypertrophy. Research shows MGF can remain active in damaged muscle tissue longer than systemic IGF-1, providing sustained anabolic signaling. The peptide works by binding to IGF-1 receptors on satellite cells, triggering their activation and proliferation. These activated satellite cells then donate their nuclei to existing muscle fibers, increasing the fiber's capacity for protein synthesis and growth. MGF also promotes the survival of muscle cells under stress conditions and may help prevent muscle wasting in various disease states.
Key Takeaways: MGF
- Strongest evidence supports MGF for satellite cell activation and muscle fiber repair
- Research doses typically range from 100 to 200 mcg via subcutaneous
- 2 benefits with strong evidence, 2 moderate, 3 preliminary
- Half-life: 5-7 minutes
- 4 cited research studies in this guide
Mechanism of Action
MGF binds to IGF-1 receptors on satellite cells, activating the PI3K/Akt signaling pathway. This activation triggers satellite cell proliferation, differentiation, and fusion with existing muscle fibers. MGF also upregulates protein synthesis through mTOR activation and provides anti-apoptotic signals to protect muscle cells from death under stress conditions.
Research Benefits
MGF at a Glance
MGF binds to IGF-1 receptors on satellite cells, activating the PI3K/Akt signaling pathway.
Satellite Cell Activation
Strong EvidenceMGF directly activates quiescent satellite cells, causing them to enter the cell cycle and begin proliferation. This process is essential for muscle repair and growth after training-induced damage.
Muscle Fiber Repair
Strong EvidenceThe peptide accelerates repair of damaged muscle fibers by promoting satellite cell fusion and increasing the nuclear-to-cytoplasmic ratio within muscle cells, enhancing protein synthesis capacity.
Hypertrophic Response
Moderate EvidenceMGF enhances muscle hypertrophy by increasing the number of myonuclei per fiber and upregulating anabolic signaling pathways including mTOR and protein synthesis machinery.
Muscle Cell Survival
Moderate EvidenceThe peptide provides anti-apoptotic signals that protect muscle cells from programmed cell death during periods of stress, injury, or metabolic challenge.
Exercise Recovery
PreliminaryMGF may reduce muscle soreness and accelerate functional recovery following intense training by promoting faster repair of exercise-induced muscle damage.
Age-Related Muscle Loss
PreliminaryResearch suggests MGF supplementation might help counteract sarcopenia by reactivating satellite cells that become less responsive with aging.
Neural Protection
PreliminarySome studies indicate MGF may have neuroprotective effects, potentially supporting motor neuron survival and function in muscle-nerve connections.
Research Dosing Protocols
Research Purposes Only: All content is for informational and research purposes only. This site does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before using any peptide or supplement.
| Research Protocol | Dose Range | Route |
|---|---|---|
| Muscle repair research | 100–200 mcg | subcutaneous |
| Satellite cell studies | 200–400 mcg | intramuscular |
| Recovery protocols | 50–150 mcg | subcutaneous |
Frequency
Once daily post-exercise
Timing
Within 2 hours after training for optimal satellite cell activation
Cycle Length
4-6 weeks with 2-4 week breaks
Research Notes
- 1Intramuscular injection may provide more localized effects
- 2Post-exercise timing appears critical for maximizing benefits
- 3Some researchers use split doses throughout the day
- 4Refrigerated storage required before reconstitution
Reconstitution Guide
Standard Reconstitution
Vial Size
2 mg
Bacteriostatic Water
1 mL
Concentration
20 mcg
per 0.1 mL (10 units)
Step-by-Step Guide
Gather Materials
MGF vial, bacteriostatic water, alcohol swabs, insulin syringes.
Equilibrate Temperature
Remove the vial from storage and allow it to reach room temperature (5-10 minutes).
Sanitize
Swab the rubber stopper of both the peptide vial and bacteriostatic water vial with alcohol.
Draw Water
Draw 1 mL of bacteriostatic water into a syringe.
Add Water to Vial
Insert the needle into the peptide vial and direct the water stream against the glass wall — not directly onto the powder.
Mix Gently
Swirl the vial gently until the powder is fully dissolved. Never shake. The solution should be clear and colorless.
Store Properly
Refrigerate at 2-8°C (refrigerated). 14-21 days after reconstitution.
Storage Temperature
2-8°C (refrigerated)
Shelf Life
14-21 days after reconstitution
Important Notes
- •Use bacteriostatic water for longer stability
- •Swirl gently, do not shake vigorously
- •Store lyophilized powder at -20°C
- •Protect from light during storage
- •Single-use vials recommended due to short half-life
MGF Dosing Calculator
Calculate daily intake, cycle totals, and vials needed with pre-filled protocols →
MGF Reconstitution Calculator
Calculate concentration, syringe units, and doses per vial with auto-filled values →
Safety & Side Effects
Reported Side Effects
- !Injection site reactions (redness, swelling)
- !Hypoglycemia due to insulin-like effects
- !Water retention and mild edema
- !Joint discomfort or stiffness
- !Headaches related to fluid shifts
- !Potential IGF-1 receptor desensitization
- !Carpal tunnel-like symptoms with prolonged use
- !Unknown long-term safety profile
- !Possible immune reactions to repeated dosing
Potential Interactions
- ⚡Insulin - may enhance hypoglycemic effects
- ⚡Growth hormone - potential synergistic anabolic effects
- ⚡IGF-1 - may compete for receptor binding
- ⚡Corticosteroids - may reduce MGF effectiveness
- ⚡Diabetes medications - blood glucose monitoring required
Important: Side effects and interactions listed here are compiled from published research and community reports. This is not a complete list. No formal drug interaction studies have been conducted for most research peptides. Always consult a qualified healthcare provider.
Research Studies
The following studies are referenced in this profile. PubMed IDs are provided where available for independent verification.
Mechano growth factor: a putative product of IGF-I gene expression involved in tissue repair and regeneration
First comprehensive description of MGF as a mechanically-induced IGF-1 variant with unique properties for muscle repair and satellite cell activation.
Local IGF-I isoform protects cardiomyocytes from hypertrophic and oxidative stresses via SirT1 activity
Demonstrated protective effects of MGF in cardiac tissue, showing anti-apoptotic properties and stress resistance mechanisms.
The role of IGF-I splicing in muscle regeneration and aging
Review examining how different IGF-1 splice variants, including MGF, contribute to muscle maintenance and age-related changes in muscle function.
Mechano-growth factor promotes proliferation of human tendon fibroblasts
Study showing MGF's effects extend beyond muscle tissue to promote healing in tendons and other connective tissues.
Note: This is not an exhaustive list of all published research. Studies are selected for relevance and quality. Click PubMed IDs to verify sources independently. Inclusion does not imply endorsement of the peptide for any clinical use.
Frequently Asked Questions
MGF is a splice variant of IGF-1 with a unique C-terminal extension that allows it to activate satellite cells more effectively. While IGF-1 primarily promotes general growth, MGF specifically targets muscle repair and responds to mechanical stress.
MGF has a very short half-life of 5-7 minutes, but its effects on satellite cell activation can be observed within hours. Noticeable recovery benefits typically appear within 2-4 days of consistent post-exercise dosing.
Intramuscular injection into the trained muscle may provide more localized effects, but subcutaneous injection is also effective and easier to perform. Both routes show benefits in research settings.
Research suggests MGF may help with muscle injury recovery by promoting satellite cell activation and muscle fiber repair. However, it should only be used for research purposes under appropriate supervision.
Common side effects include injection site reactions, potential hypoglycemia, mild water retention, and joint discomfort. Long-term effects are not well-studied, making careful monitoring essential.
Typical research protocols use 4-6 week cycles followed by 2-4 week breaks to prevent receptor desensitization and allow assessment of sustained effects.
Yes, both lyophilized powder and reconstituted MGF require refrigerated storage. The powder should be stored at -20°C, while reconstituted peptide should be kept at 2-8°C and used within 2-3 weeks.
Yes, MGF has insulin-like effects that can lower blood glucose levels. Researchers should monitor blood sugar, especially when combining with other glucose-lowering compounds or during fasting states.
Research & Educational Use Only
All content is for informational and research purposes only. This site does not provide medical advice, diagnosis, or treatment. Consult a qualified healthcare professional before using any peptide or supplement.
The information presented here is compiled from published research studies and is intended for informational purposes only. Individual results may vary. Always consult with a licensed healthcare provider.