MGF (Mechano Growth Factor) vs Orforglipron
Side-by-side comparison of key properties, dosing, and research.
Anabolic & IGF
MGF (Mechano Growth Factor)GLP-1 / Weight Loss Agonists
Orforglipron- Summary
- MGF (Mechano Growth Factor) is a splice variant of IGF-1 that is locally produced in muscle tissue in response to mechanical damage from exercise. It activates muscle satellite cells (stem cells) to proliferate and repair damaged fibers, making it specifically targeted at exercise-induced hypertrophy.
- Orforglipron is an oral, once-daily small-molecule GLP-1 receptor agonist developed by Eli Lilly. Unlike injectable GLP-1 peptides, it is a non-peptide compound absorbed orally without food restrictions, representing a major convenience advancement. Phase 2 trials showed up to 9.4% weight loss at 36 weeks, and Phase 3 trials (ATTAIN program) are ongoing for obesity and type 2 diabetes.
- Half-Life
- Native MGF: minutes. PEG-MGF: ~3 days
- ~12 hours (once-daily oral dosing)
- Admin Route
- SubQ, IM
- Oral
- Research
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- Typical Dose
- 200–400 mcg
- 12 mg → 24 mg → 36 mg → 45 mg
- Frequency
- 1–2 times per week
- Once daily
- Key Benefits
- Activates muscle satellite cells for repair and growth
- Accelerates recovery from muscle damage
- Synergistic with IGF-1 LR3 (different mechanisms)
- Promotes muscle hypertrophy specifically at exercised muscles
- Faster recovery between training sessions
- Potential for injury repair in connective tissue
- Oral pill — no injections required
- Once-daily dosing without food restrictions (unlike oral semaglutide)
- Up to 9.4% body weight reduction in Phase 2 at 36 weeks
- Significant HbA1c reduction in type 2 diabetes trials
- Small-molecule stability — no cold chain requirements
- Broadens access for injection-averse patients
- Potential class-defining convenience advantage over injectable GLP-1s
- Side Effects
- Muscle soreness (satellite cell activation)
- Injection site irritation
- Hypoglycemia risk (modest, less than IGF-1 LR3)
- Nausea (most common, dose-dependent)
- Vomiting
- Diarrhea
- Decreased appetite
- +2 more
- Stacks With
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