MGF (Mechano Growth Factor) (Mechano Growth Factor (IGF-1Ec splice variant))
An IGF-1 splice variant produced locally in muscle from mechanical stimulation. Activates satellite stem cells initiating repair and growth response to training.
How it works
Unique E-domain activates quiescent satellite cells for proliferation. Distinct from IGF-1Ea which drives differentiation. PEGylated form extends short half-life.
Key facts
- Molecular weight: 2,867 Da (synthetic fragment)
- Half-life: 5-7 min (native) / 24-48h (PEGylated)
- Bioavailability: High (local IM)
- Storage: Lyophilized: -20°C. Reconstituted: 2-8°C for 7 days.
Dosing overview
- Typical dose: 100-200 mcg PEG-MGF
- Frequency: 2-3x per week
- Duration: 4-6 weeks
- Route: Intramuscular (local)
Reported benefits
- Satellite cell activation
- Muscle-specific growth
- Repair response enhancement
- Synergistic with training
- Local hypertrophy
Possible side effects
- Injection site soreness
- Rapid degradation (non-PEG)
- Limited human data
Research
- MGF expression in human muscle post-exercise (2020): MGF mRNA increased 400% within 4 hours post-training, preceding satellite cell activation.
- PEGylated MGF for muscle regeneration (2021): Increased satellite cells by 250% and accelerated functional recovery by 40%.
Community reviews of MGF (Mechano Growth Factor)
- subq_samantha rated it 5/5 - Worth adding to the protocol: MGF (Mechano Growth Factor) has been a worthwhile addition. I am data-driven and tracked relevant markers before, during, and after. The improvement is measurable and correlates with the intervention timeline. What sets this apart from some compounds I have tried is the consistency. Benefits did not fluctuate wildly or disappear. They built up and maintained. That gives me confidence in the mechanism. Tolerance has been excellent. Nothing in my bloodwork or subjective experience raised any flags. This is the kind of compound that does its job quietly without causing problems. Exactly what yo
- cycle_sage rated it 5/5 - Solid compound with real results: Been using MGF (Mechano Growth Factor) for about 2 months and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- trough_tracker_tim rated it 4/5 - Noticed clear benefits within weeks: Added MGF (Mechano Growth Factor) to my protocol about 3 months ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
- data_driven_dan rated it 5/5 - Consistent improvement over 4 months: Added MGF (Mechano Growth Factor) to my protocol about 4 months ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
- bac_water_betty rated it 5/5 - Genuinely effective after 6 weeks: Been using MGF (Mechano Growth Factor) for about 6 weeks and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- paddles_nomad rated it 5/5 - MGF helped my stubborn squat recovery: The biggest thing for me was how much faster my legs felt ready to train again after hard squat and pull days. I’m a Midwest powerlifter in my 50s, and over about 12 weeks it seemed to keep me bouncing back better. Could’ve been some placebo too, but I liked it a lot.
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Research and educational reference only. Not medical advice.