MGF (Mechano Growth Factor) vs Sermorelin

MGF (Mechano Growth Factor): A locally-acting IGF-1 splice variant released by muscle in response to mechanical load. Typical dose 200-400 mcg. Sermorelin: The original GHRH analog and the first FDA-approved peptide secretagogue. Typical dose 200-500 mcg. Both fall under the Growth Hormone category.

Stacking MGF (Mechano Growth Factor) with Sermorelin is a protocol-design question best raised with a clinician — it depends on your goal, current bloodwork, and whether both peptides target overlapping mechanisms. Both peptides should be tracked independently with separate injection sites and timing. PinnyPeptide supports multi-peptide stacks with automatic injection site rotation.

MGF (Mechano Growth Factor) is typically dosed: Post-workout, into the worked muscle (intramuscular) for Localized muscle repair (non-pegylated); Twice weekly (SubQ) for Systemic muscle recovery (PEG-MGF). Sermorelin is typically dosed: Once daily before bed (SubQ) for GH optimization / anti-aging; Once daily before bed for Combined with Ipamorelin; Once daily before bed for Pediatric GHD (historical, prescribing-physician only).

MGF (Mechano Growth Factor): Not FDA approved for any indication. Sermorelin: Previously FDA approved (1997, as Geref) for pediatric GHD. Brand discontinued 2008. Available in the US via compounding pharmacies on prescription.