PEG-MGF_
Also known as pegylated MGF
A longer-lasting muscle-repair peptide on a less-frequent schedule.
Common vial size is what vendors typically sell, not a recommendation. Enter your own vial in the calculator.
What is PEG-MGF?
Plain language first. The technical label stays, but it never stands alone.Overview
PEG-MGF is mechano growth factor with a PEG coating that makes it last far longer in the body. In plain terms: it does the same muscle-repair job as MGF but on a less-frequent schedule.
What it's used for
A longer-lasting version of the muscle-repair peptide, used on a less-frequent schedule.
How does PEG-MGF work?
What it does in the body, and where.PEG-MGF is MGF with a polyethylene glycol coating attached, a standard drug-industry technique for making a molecule last longer.
- 01Same satellite-cell activation as MGFThe active part is unchanged.
- 02The PEG coating slows clearanceTurning a minutes-long half-life into hours, so it can be injected less often.
- 03The trade is localityMGF's appeal was acting where you injected it. Making it last longer means it also spreads further, which somewhat undermines the point.
- 04No human trialsSame as MGF.
Where this compound is thought to act.
What else is it used for?
Each use below carries its own evidence level. Approved means regulators have cleared it for that purpose. Investigational means it is in trials. Early research means it is being studied and is not established.
- Muscle repair on a less frequent schedule than plain MGFResearch only
How much, and do you cycle it?
The range, and whether you take breaks.0.2 up to 0.4 mg per dose (start low, increase slowly), 1-2x per week. No established scheduleNo range
No published study has established how long to take this or whether a break is needed. Schedules quoted online come from vendors and forums, and different sources disagree.
How do I dose and price it?
Enter your vial and your dose. Pick a mix. We show the draw and the cost.The vial holds a fixed amount of drug. Adding more water does not make more drug, it just spreads it thinner, so you draw a bigger number on the syringe for the same dose.
Choose your mix
Measuring the water1 mL = one full 100-unit syringe.
Your draw
20 / 100 unitsHow do you store it?
Before mixing, and after.Dry powder in the freezer or fridge. Once mixed, fridge, and use within about a month.
Unmixed lyophilized PEG-MGF keeps for a long time cold. Once you add water the clock starts: most reconstituted vials hold up for roughly 28 to 30 days at fridge temperature. Keep it out of light, and do not freeze it after mixing.
What are the side effects and cautions?
Known cautions and warnings for this compound.Who should avoid it
- No human safety data exists, so nobody can say who should avoid it
- Pregnancy
- Active cancer, as a precaution given the growth mechanism
Stop and get help
- Anything unusual, since there is no known safety profile to compare against
- Signs of an allergic reaction such as face or throat swelling, hives, or trouble breathing
Common effects
- Unknown in humans. This compound has only been studied in cells and animals
Where this page says nothing is established, that means nobody has studied it, not that a compound is safe.
Is PEG-MGF approved?
And where the numbers on this page come from.No. Not FDA-approved.
Sold for research use only. Not cleared for human consumption or medical use.
- DoseFrom research and community reports. No regulator has reviewed this dose.
- Vial sizeFrom what vendors typically list; not a recommendation.
- Reviewed22 July 2026
What else is like PEG-MGF?
Others in Muscle building, side by side.If you're weighing PEG-MGF, it's worth reading Bimagrumab, Ipamorelin + CJC-1295 blend, and IGF-1 LR3 in the same class.
A longer-lasting muscle-repair peptide on a less-frequent schedule.
- Dose
- 0.2 up to 0.4 mg per dose (start low, increase slowly)
- How often
- 1-2x per week
An experimental shot that strips fat while adding muscle.
- Dose
- 10 up to 30 mg/kg per month (trial doses)
- How often
- Monthly
The popular growth-hormone combo in one shot, for muscle, recovery, and sleep.
- Dose
- ~100 mcg CJC + 200-300 mcg ipa
- How often
- Daily, often at night
A powerful muscle-builder that also drops blood sugar hard.
- Dose
- 0.02 up to 0.05 mg per day (start low, increase slowly)
- How often
- Daily, cycled
10What these words mean
Show glossary +
What these words mean
- Titrate
- Starting at a low dose and increasing it slowly over time so your body adjusts and side effects stay mild.
- Subcutaneous
- An injection just under the skin, into the fat layer, usually with a short, thin insulin needle.
- Intramuscular (IM)
- An injection into a muscle, using a longer needle.
- Reconstitution
- Mixing a powdered peptide with liquid (bacteriostatic water) so it can be drawn into a syringe.
- Bacteriostatic water
- Sterile water with a tiny amount of preservative, used to mix powdered peptides.
- Concentration
- How strong the mixed peptide is, in milligrams per milliliter (mg/mL). More water makes it weaker; less water makes it stronger.
- Units (on the syringe)
- The marks on an insulin syringe. 100 units equals 1 mL. They measure how much liquid you draw, not the dose in milligrams.
- mcg and mg
- Units of dose. 1 milligram (mg) equals 1,000 micrograms (mcg).
- GLP-1
- A natural gut hormone that lowers appetite and blood sugar. Drugs that copy it, like semaglutide, are used for weight loss.
- Growth hormone secretagogue
- A compound that nudges your body to release more of its own growth hormone, rather than injecting the hormone itself.
- Half-life
- How long a compound stays active in your body. A longer half-life means you inject less often.
- Peptide vs small molecule
- A peptide is a short chain of amino acids. A few items here (like MK-677 or methylene blue) are small molecules, not true peptides, but people use them the same way.
- Research only
- No approved dose or use in people. Sold for research and not reviewed by the FDA for safety or quality.
- Investigational
- Still being tested in clinical trials and not yet approved or legally sold for general use.
- Banned in drug-tested sport
- Prohibited by the World Anti-Doping Agency (WADA); using it can disqualify a competing athlete.
Last reviewed 22 July 2026