PEG-MGF (2 mg vial)
Once daily subcutaneous protocol for growth hormone axis research.
PEG-MGF is a pegylated version of mechano growth factor, the IGF-1 splice variant muscle produces after mechanical damage, studied preclinically for satellite-cell activation. The protocol below times subcutaneous doses to post-training windows.
Quick answer: at the standard 2 mg + 0.2 mL reconstitution, a 500 mcg dose of PEG-MGF draws 5 units (0.05 mL) on a U-100 insulin syringe, once daily subcutaneous.
Protocol overview
Dosing & reconstitution
Frequency: Once daily subcutaneous
Typical duration: 8 weeks
Reconstitution: 2 mg vial + 0.2 mL bacteriostatic water = 10 mg/mL. Units below are for a U-100 insulin syringe at this concentration.
| Phase | Dose | Units per injection |
|---|---|---|
| Weeks 1-2 | 200 mcg | 2 units (0.02 mL) |
| Weeks 3-4 | 300 mcg | 3 units (0.03 mL) |
| Weeks 5-6 | 400 mcg | 4 units (0.04 mL) |
| Weeks 7-8 | 500 mcg | 5 units (0.05 mL) |
Units = (dose ÷ concentration) × 100 on a U-100 syringe. Change the vial size or water volume and the calculator redoes all of this for you.
Track this protocol → Free account · log doses, rotate sites, never lose your history
PEG-MGF dosing — what the literature actually supports
We publish a schedule when there is a citable human source and we say so when there is not. Filling this space with a number nobody measured would make the page look more complete and be worth less than nothing to you.
Reconstitution and measurement
This part is arithmetic and does not depend on the evidence level. Concentration is vial size divided by the bacteriostatic water you add. Draw volume is your target amount divided by that concentration. Units are draw volume times 100, because a U-100 syringe reads 100 units per millilitre. Common vials for PEG-MGF: Not stocked by our featured supplier.
- Wipe the stoppers of both vials with an alcohol swab and let them dry.
- Draw the bacteriostatic water with a sterile syringe and inject it slowly down the inside wall of the peptide vial — never straight onto the powder.
- Swirl gently until the solution is clear. Do not shake; foaming and agitation damage peptides.
- Label the vial with the date and concentration, and refrigerate at 2–8 °C protected from light.
Storage and stability
Important notes
Practical considerations for consistency and safety.
- Use a new sterile insulin syringe for each injection and dispose in a proper sharps container.
- Inject slowly and steadily; wait a few seconds before withdrawing the needle to ensure complete delivery.
- Administer at the same time each day for consistent levels. Setting a daily reminder helps maintain the schedule.
- This compound lacks controlled human safety data. Start with the lowest reported amount and increase gradually while monitoring for any adverse reactions.
- The 2 mg vial size is standard for this compound. Reconstitute with 0.2 mL bacteriostatic water for a convenient concentration.
How PEG-MGF works
A pegylated form of mechano growth factor, an IGF-1 splice variant expressed by muscle in response to mechanical loading and damage. Pegylation is intended to slow clearance of an otherwise very short-lived peptide.
Benefits & side effects
Potential benefits
- PEGylated mechano growth factor for extended action
- Targets damaged muscle tissue
- Supports satellite cell activation
- Post-exercise or post-injury timing
Possible side effects
- Injection site reactions
- Limited human safety data
- May cause localized swelling
- Preclinical safety profile
This list reflects published literature and community reports. Individual responses vary. Not medical advice.
Bloodwork worth tracking
The community-standard practice is a baseline panel before starting, a recheck 8 to 12 weeks in, and another after time off. For PEG-MGF, the markers most worth watching:
IGF-1CMPCBC
Typical time off: 4 wks
Lab panels are how a research protocol stays honest: numbers move before symptoms do. Interpretation belongs with a clinician. Not medical advice.
Lifestyle factors
None of the literature above was run on a background of poor sleep and no protein. These variables move outcomes more reliably than any compound on this site.
- Protein in the 1.6 to 2.2 g/kg range preserves lean mass through any body-composition phase.
- Resistance training 2 to 4 days per week plus 150+ minutes of weekly aerobic work reinforces whatever the protocol is doing.
- Sleep is the recovery window: 7 to 9 hours at consistent times.
- Hydration matters more than usual on compounds with GI or flushing effects: 2 to 3 liters daily.
- Track the variables that matter: weigh-ins, measurements, photos, and labs at sensible intervals.
References
Quick answers
How many syringe units is a 500 mcg dose of PEG-MGF?
At the standard reconstitution of 2 mg with 0.2 mL bacteriostatic water (10 mg/mL), a 500 mcg dose draws 5 units (0.05 mL) on a U-100 insulin syringe.
How do you reconstitute PEG-MGF?
Add 0.2 mL of bacteriostatic water to the 2 mg vial for 10 mg/mL. Inject the water slowly down the inside wall of the vial, swirl gently without shaking, and refrigerate at 2 to 8 °C after mixing.
How long does a 2 mg vial of PEG-MGF last?
About 4 maintenance doses of 500 mcg, roughly 0.6 weeks at once daily subcutaneous.
Does PEG-MGF have human trial data?
No. The evidence base is animal and cell studies; the practical dosing shown is community convention, and the page labels it that way.
How does PEG-MGF work?
A pegylated form of mechano growth factor, an IGF-1 splice variant expressed by muscle in response to mechanical loading and damage. Pegylation is intended to slow clearance of an otherwise very short-lived peptide.
Sourcing PEG-MGF
Our featured supplier does not stock this compound, and we are not going to point you at a vendor we have not looked at. Use the COA checklist on whoever you do buy from, and check the batch number on the certificate against the vial you receive.
