MOTS-c vs PEG-MGF

A detailed comparison to help you understand the differences and choose the right peptide for your research goals.

MOTS-c

MOTS-c (Mitochondrial Open Reading Frame of the Twelve S rRNA type-c) is a mitochondrial-derived peptide that plays a key role in metabolic regulation and has emerged as a significant longevity research target.

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PEG-MGF

PEG-MGF (PEGylated Mechano Growth Factor) is a variant of IGF-1 that is produced in response to muscle damage. PEGylation extends its half-life from minutes to several hours, making it practical for use.

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Side-by-Side Comparison

Aspect	MOTS-c	PEG-MGF
Dose Range	5 mg–10 mg	400 mcg–1.2 mg
Frequency	Less than daily	Less than daily
Cycle Length	8–12 weeks	4–6 weeks
Route	subcutaneous	subcutaneous
Mechanism	Activates AMPK pathway, enhances glucose uptake in skeletal muscle, improves insulin sensitivity, and regulates mitochondrial function. Acts as a metabolic hormone affecting whole-body energy homeostasis.	Activates muscle satellite cells (stem cells) and promotes their fusion to existing muscle fibers for repair and growth. MGF is produced naturally in response to mechanical stress on muscles.
Typical Dosage	Research protocols typically use 5-10mg administered subcutaneously several times per week. Optimal dosing not yet established.	Research protocols typically use 200-400mcg injected into targeted muscle groups 2-3 times weekly, usually post-workout.
Administration	Subcutaneous injection. Often combined with exercise protocols as it enhances exercise capacity and metabolic adaptation.	Intramuscular injection, ideally into muscles trained that day. Best administered post-workout when satellite cell activation is relevant.
Side Effects	Limited human data. Animal studies show good tolerability. May affect energy levels and exercise performance.	Injection site soreness, potential hypoglycemia, and localized swelling. Generally well-tolerated.
Best For	Muscle Growth Fat Loss Anti-Aging & Longevity	Muscle Growth Recovery & Healing