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RegenerativeTier 3 β€” Animal + early human data

MGF

Mechano Growth Factor Β· IGF-1Ec Β· PEG-MGF

Splice variant of IGF-1 produced locally in muscle and other tissues in response to mechanical damage or exercise. Acts as an acute tissue-repair signal that activates satellite cells before systemic IGF-1 takes over. PEGylated form (PEG-MGF) extends half-life from minutes to days.

πŸ’‰ SC injection / IM injection🧊 Native MGF: lyophilised βˆ’20 Β°C; reconstituted β€” use immediately (minutes half-life). PEG-MGF: lyophilised βˆ’20 Β°C; reconstituted refrigerate, use within 14 days.

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Mechanism of Action

MGF's unique C-terminal E-domain (distinct from IGF-1 LR3) activates satellite cells via a non-IGF1R pathway, triggering their proliferation and fusion into damaged myofibres. This is the initial, localised repair response. Downstream maturation of newly fused cells then depends on systemic IGF-1.

Clinical Applications

  • βœ“Acute muscle injury repair β€” localised injection near damaged tissue
  • βœ“Prevention of atrophy during immobilisation or injury
  • βœ“Enhancement of muscle repair post-eccentric training
  • βœ“Adjunct to BPC-157/TB-500 in comprehensive musculoskeletal repair stacks

Dosing Protocol

Recommended Dosing

SC or IM injection (near target muscle). Native MGF: 100–200 mcg immediately post-workout or post-injury, half-life ~minutes β€” must be used immediately after reconstitution. PEG-MGF: 100–200 mcg 2x/week SC, half-life ~days. Cycle: 4–6 weeks. Often combined with IGF-1 LR3 (MGF first, then IGF-1 LR3 30 min later).

Safety & Contraindications

Possible Side Effects

  • ⚠Localised muscle swelling and soreness at injection site (expected, reflects satellite cell activation)
  • ⚠Potential for hypoglycaemia when combined with IGF-1 LR3
  • ⚠Limited human safety data β€” use conservative doses

Contraindications

  • βœ•Active malignancy (satellite cell proliferation signal may generalise)
  • βœ•Combination with insulin (hypoglycaemia risk)
  • βœ•Pregnancy

Combinations & Synergies

πŸ”— IGF-1 LR3sequential protocol β€” MGF activates satellite cells (30 min post-workout), IGF-1 LR3 promotes their maturation (immediately after)
πŸ”— BPC-157 + TB-500comprehensive musculoskeletal repair stack β€” MGF for satellite cell activation, BPC-157 for connective tissue, TB-500 for systemic repair
#muscle#satellite-cells#regenerative#injury#sports#IGF-1#Tier-3
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