How Much Does PEG-MGF Cost in 2026?
PEG-MGF (Pegylated Mechano Growth Factor) is a synthetic, extended-release variant of MGF — a natural splice variant of IGF-1 that muscles produce in response to exercise-induced stress. The PEGylation modification extends its biological activity from minutes to days, making it more suitable for research applications. PEG-MGF is studied primarily in the context of muscle satellite cell activation and repair. In April 2026, the FDA removed PEG-MGF from the Category 2 503A bulk drug substances list.
Current PEG-MGF Prices by Supplier
PEG-MGF is typically sold in 2mg vials due to its potency in research models. The PEGylation adds manufacturing cost compared to unmodified peptides, placing it in the mid-to-upper price range for research peptides.
| Supplier | Size | Price | Notes |
|---|---|---|---|
| Ion Peptide Best Value | 2mg | $33.15 | ~$16.58/mg. USA-based, COA provided |
| American Peptide Research | 2mg | $55.50 | ~$27.75/mg. USA-based, COA provided |
Prices sourced from publicly available supplier listings, May 2026. Verify current pricing directly with each supplier before ordering.
What Is PEG-MGF?
PEG-MGF stands for Pegylated Mechano Growth Factor. To understand it, it helps to trace its origins:
- IGF-1 (Insulin-like Growth Factor 1) — A hormone produced by the liver and peripheral tissues that promotes cell growth and repair.
- MGF (Mechano Growth Factor) — A splice variant of IGF-1 produced locally in muscle tissue in response to mechanical stress (exercise, injury). MGF specifically activates satellite cells — the muscle stem cells responsible for initiating repair and adaptation.
- PEG-MGF — MGF with polyethylene glycol (PEG) conjugated to it, extending its half-life from approximately 5 minutes to 1–2 days. This modification was designed to make MGF more practical for research use and therapeutic development.
The PEGylation specifically stabilizes the E-domain of MGF (the region that differs from standard IGF-1 and is responsible for satellite cell activation), allowing sustained research activity that more closely mimics the physiological state following heavy exercise.
What Researchers Study PEG-MGF For
- Muscle satellite cell activation — The primary research focus. Satellite cells are quiescent muscle stem cells that become activated following injury or intense exercise. PEG-MGF appears to activate and mobilize these cells, a critical first step in muscle repair.
- Muscle recovery from injury — Animal studies have examined PEG-MGF's role in accelerating recovery from muscle tears, contusions, and surgery-induced damage.
- Age-related muscle loss (sarcopenia) — Older animals show reduced MGF production in response to exercise; research has examined whether supplementing with PEG-MGF can partially compensate for this decline.
- Combination with other IGF variants — Some research has examined PEG-MGF in combination with standard IGF-1 or LR3-IGF-1, given that the two molecules appear to activate different aspects of the muscle repair cascade.
- Cardiac and smooth muscle — Beyond skeletal muscle, some studies have explored PEG-MGF's effects on cardiac muscle recovery after ischemia.
PEG-MGF vs. TB-500 for Muscle Recovery Research
Both PEG-MGF and TB-500 (Thymosin Beta-4) are research peptides studied in the context of muscle and tissue repair, but they work through entirely different mechanisms:
- PEG-MGF specifically activates muscle satellite cells and promotes muscle-specific hypertrophy pathways. Its effects are more localized to skeletal and cardiac muscle tissue.
- TB-500 is a naturally occurring peptide that promotes actin polymerization, which supports repair across multiple tissue types — not just muscle, but tendons, blood vessels, and other tissues too.
Some research has examined both in combination, based on the hypothesis that they target different phases or aspects of the repair process. See our TB-500 price guide for comparison.
Notable Research Suppliers (2026)
Ion Peptide
American Peptide Research
What to Look for in a PEG-MGF Supplier
- PEGylation verification — The PEG conjugation is the defining feature of PEG-MGF vs plain MGF. A reputable supplier should be able to document that the PEG modification is present and correctly attached (typically via mass spectrometry).
- HPLC purity ≥98% — Standard purity requirement, from an independent named laboratory.
- Correct molecular weight — PEG-MGF has a higher molecular weight than unmodified MGF due to the PEG chain. MS data confirming correct MW is important.
- Lyophilized form — Should be supplied as freeze-dried powder for maximum stability.
- Cold chain shipping — PEG-MGF is more sensitive to temperature during shipping than many smaller peptides.
Frequently Asked Questions
How much does PEG-MGF cost?
Pre-reclassification, PEG-MGF 2mg vials were priced from approximately $30 to $50 depending on the supplier. Being a modified peptide with PEGylation, it carries higher manufacturing costs than simple linear peptides. Post-April 2026 pricing is being actively tracked.
Why is PEG-MGF sold in 2mg vials rather than 5mg or 10mg?
PEG-MGF is typically sold in 2mg quantities because research protocols tend to use smaller doses, and the compound's higher per-milligram production cost makes larger vials less practical from a pricing standpoint. 2mg is a standard research quantity that covers multiple research applications in typical animal study designs.
What is the difference between PEG-MGF and IGF-1 LR3?
Both are IGF-1 variants but with different mechanisms. IGF-1 LR3 is a long-acting version of IGF-1 with an extended half-life due to reduced binding to serum proteins. PEG-MGF is a splice variant of IGF-1 (the Ec variant) with PEGylation for extended activity. MGF specifically activates muscle satellite cells, while IGF-1 promotes more generalized anabolic signaling. They are often studied as complementary rather than competing compounds in muscle repair research.
How should PEG-MGF be stored?
Lyophilized PEG-MGF should be stored at −20°C for long-term stability. Reconstituted PEG-MGF should be stored at 4°C and used within 2–3 weeks. PEG-MGF is more sensitive to temperature fluctuations than some smaller peptides, so avoid repeated freeze-thaw cycles.
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Prices are actively updating post-reclassification. We'll notify you when verified pricing is available or when prices drop.