MGF (5mg Vial) Dosage Protocol
Mechano Growth Factor (IGF-1 splice variant) studied for muscle repair — research/educational dosing reference.
Mix & measure MGF · 5 mg
Pre-filled with this protocol’s recommended BAC water and documented starting dose — edit any field to run your own numbers.
Reconstitution math only — not dosing advice. U-100 syringe: 100 units = 1 mL. Full reconstitution guide → · Advanced calculator →
Quickstart Highlights
MGF (Mechano Growth Factor) is a splice variant of IGF-1 — the isoform IGF-1Ec — produced locally by mechanically stressed or damaged muscle, where it is studied for activating muscle satellite cells and supporting muscle repair[1][5]. This educational page outlines a once-daily subcutaneous approach with a dilution chosen so doses land on easy-to-read insulin-syringe marks. It is an unapproved research chemical, not a medicine, and human efficacy and safety are not established — the evidence is preclinical and animal-based, and this is presented for research and educational use only.
Add 3.0 mL bacteriostatic water to one 5 mg vial → ~1.67 mg/mL (1,667 mcg/mL), the largest practical dilution for accurate dosing.
200–500 mcg once daily, titrated upward gradually across an 8–12 week course (about ~2–3.5 mg per week on average).
At ~1.67 mg/mL, 1 unit ≈ 16.7 mcg; 200 mcg ≈ 12 units and 500 mcg ≈ 30 units on a U-100 syringe.
Lyophilized: store at −20 °C (−4 °F); once reconstituted, refrigerate at 2–8 °C (35.6–46.4 °F) and do not freeze the solution.
Important: Start with the Prep & Injection Guide — it covers the preparation and safety basics every protocol on this site assumes.
Dosing & Reconstitution Guide
A single practical dilution with accurate once-daily dosing, step by step
Standard / Gradual Approach (3 mL = ~1.67 mg/mL)
Reconstitute: Add 3.0 mL bacteriostatic water to one 5 mg vial → final concentration ~1.67 mg/mL (1,667 mcg/mL).
Typical daily range: 200–500 mcg once daily, raised gradually over an 8–12 week course.
Easy measuring: At ~1.67 mg/mL, 1 unit ≈ 16.7 mcg on a U-100 syringe. At this dilution the illustrative doses land between 12 and 30 units — for the smallest doses, a 30- or 50-unit syringe improves readability.
Storage: Lyophilized: store at −20 °C (−4 °F); after reconstitution, refrigerate at 2–8 °C (35.6–46.4 °F) and do not freeze the mixed solution.
Frequency: one subcutaneous injection each day, titrating up as tolerated. Across the cycle the weekly total averages roughly 2–3.5 mg. These figures are an illustrative measurement framework only — they are not from approved human dosing, and evidence-based subcutaneous dosing for MGF is not established[3][4].
Reconstitution Steps
Draw 3.0 mL of bacteriostatic water into a sterile syringe.
Release it slowly down the vial’s inner wall to limit foaming.
Swirl or roll gently until fully dissolved — don’t shake.
Label with the date and concentration, then refrigerate at 2–8 °C (35.6–46.4 °F), shielded from light.
The 3.0 mL dilution keeps the illustrative doses in a readable 12–30 unit range on a U-100 syringe; for the smallest doses a 30- or 50-unit syringe improves precision. Avoid freezing the reconstituted solution, since freeze–thaw can denature the peptide.
Important: This guide is for educational purposes only and is not medical advice. For research use only. Not for human consumption.
Supplies Needed
Quantities below assume an 8–16 week course of once-daily injections with gradual titration.
At the illustrative ~2–3.5 mg/week average, a 5 mg vial covers roughly 1.5–2 weeks, so plan accordingly.
- 8 weeks: ~4 vials
- 12 weeks: ~7 vials
- 16 weeks: ~10 vials
- Per injection: 1 syringe
- 8 weeks (once daily): ~56 syringes
- 16 weeks (once daily): ~112 syringes
Use ~3.0 mL per 5 mg vial for reconstitution.
- 8 weeks (4 vials): ~12 mL → 2 bottles
- 16 weeks (10 vials): ~30 mL → 3 bottles
One for the vial stopper + one for the injection site each day.
- Per injection: 2 swabs
- 8 weeks (once daily): ~112 swabs → 1–2 boxes
Protocol Overview
A concise summary of the once-daily regimen, drawn from commonly cited reference protocols.
- ▪Goal: Studied for activating muscle satellite cells and supporting muscle repair and hypertrophy via the IGF-1Ec splice variant — effects reported preclinically in animal models, not established in humans[5][6].
- ▪Schedule: Daily subcutaneous injections for 8–12 weeks, optionally extended to ~16 weeks for longer research goals.
- ▪Dose Range: 200–500 mcg per day with gradual titration, averaging about ~2–3.5 mg per week.
- ▪Reconstitution: 3.0 mL bacteriostatic water per 5 mg vial gives ~1.67 mg/mL for accurate unit measurements.
- ▪Storage: Keep the dry vial frozen at −20 °C (−4 °F); once mixed, refrigerate at 2–8 °C and do not freeze the solution.
Dosing Protocol
A suggested daily titration approach based on common reference doses.
- ▪Start: Begin at 200–300 mcg once daily to gauge tolerability.
- ▪Titrate: Increase by roughly 100 mcg every one to two weeks as tolerated.
- ▪Target: Reach about 400–500 mcg daily by weeks 5–12.
- ▪Cycle Length: Typically 8–12 weeks; some references extend to ~16 weeks.
- ▪Timing: Inject at a consistent time each day and rotate injection sites systematically.
Storage Instructions
Correct storage is what preserves the peptide’s stability and activity.
- ▪Lyophilized: Hold the dry vial at −20 °C (−4 °F) in dry, dark conditions and limit moisture exposure[7].
- ▪Reconstituted: Refrigerate at 2–8 °C (35.6–46.4 °F) and use within about 28 days; do not freeze the mixed solution, as freezing can denature peptides[8].
- ▪Handling: Let frozen vials warm to room temperature before opening so condensation won’t form, and keep the solution clear of heat and direct light.
- ▪Freeze–thaw: Avoid repeated freeze–thaw cycles of the reconstituted solution.
Important Notes
Practical points that keep daily administration safe and consistent.
- ▪Sterile technique: Use a fresh sterile U-100 insulin syringe each time and drop it straight into a puncture-proof sharps container afterward.
- ▪Site rotation: Move between abdomen, thighs and upper arms to reduce local irritation and lipohypertrophy[9].
- ▪Slow injection: Push the plunger slowly and pause a few seconds before withdrawing the needle to prevent backflow.
- ▪Recordkeeping: Log the daily dose, injection site and any observations to keep the protocol consistent.
- ▪Regulatory note: MGF is an unapproved research chemical — it is not approved by any regulator for human use and is prohibited by WADA for athletic use[10].
How This Works
MGF (Mechano Growth Factor) is a splice variant of insulin-like growth factor 1 — the isoform known as IGF-1Ec[1][2]. It is produced locally within muscle in response to mechanical loading and tissue damage, and is distinguished from systemic IGF-1 by its unique C-terminal E-domain.
Its core proposed mechanism is the activation of muscle satellite cells (myogenic progenitor cells), which can proliferate and fuse to support muscle repair and hypertrophy after mechanical stress[5][6]. In cell and animal studies the E-domain peptide and full-length MGF have been linked to satellite-cell recruitment, while full-length MGF can also engage the IGF-1 receptor in vitro.
MGF shows a distinct temporal expression pattern after injury — appearing early and ahead of the systemic IGF-1Ea isoform — which has led researchers to study its E-domain biology in muscle and other tissues[11]. A pegylated, longer-acting variant known as PEG-MGF has also been described in the research literature[12].
Important caveat: MGF’s human efficacy and safety are not established. The available evidence is preclinical and animal-based, and there are no completed human efficacy trials demonstrating that injected MGF builds or repairs muscle. Muscle “repair” and “hypertrophy” claims rest on cell and animal data and should be read as hypotheses, not proven outcomes.
MGF is not an approved medicine. It is an unapproved research chemical — not approved by any regulator — presented here for research and educational purposes only.
Lifestyle Factors
Habits that may support recovery alongside the protocol.
- ▪Nutrition: Keep protein intake adequate to give tissue repair the building blocks it needs.
- ▪Activity & rest: Pair appropriate movement with real recovery time and avoid overtraining during an injury-recovery phase.
- ▪Sleep: Aim for 7–9 hours to support the body’s natural repair processes.
- ▪Stress: Manage stress with evidence-based practices, since it influences overall healing.
Potential Benefits & Side Effects
What preclinical and veterinary literature describe; human evidence is limited and individual results vary.
Potential Benefits
- ▪Muscle repair (preclinical): Cell and animal studies report activation of muscle satellite cells and support for muscle repair and hypertrophy[5][6].
- ▪Early local expression (preclinical): MGF (IGF-1Ec) is expressed early and locally after mechanical loading or injury, ahead of the systemic IGF-1 isoform, in animal models[11].
- ▪Tolerability (preclinical): Reported as generally tolerated in preclinical studies, with occasional mild injection-site reactions; human tolerability is not characterized.
- ▪Note on humans: These benefits are not established in humans — the evidence is preclinical, and no large-scale human efficacy trials of MGF have been completed[13].
Common Side Effects
- ▪Injection-site reactions: Mild redness, tenderness or soreness can occur; rotating sites helps.
- ▪Unknown long-term profile: Human safety data is limited, so caution and monitoring are advised.
- ▪Sport restriction: Note that MGF is a WADA-prohibited substance for athletes.
Injection Technique
General subcutaneous technique, following established clinical best-practice guidance[14][15].
Pre-Injection Preparation
- ▪Wash your hands well with soap and water.
- ▪Wipe the vial stopper with an alcohol swab and let it air-dry.
- ▪Choose a site (abdomen, thigh, or upper arm) and clean it with a fresh alcohol swab, letting it dry fully[15].
- ▪Draw the intended dose, then check for air bubbles and push any out.
Injection Procedure
- ▪Pinch a skinfold at the chosen site between thumb and forefinger.
- ▪Insert the needle into the pinch at a 45–90-degree angle (use 45 degrees if the fat layer is thin)[14].
- ▪Skip aspiration for subcutaneous shots — it isn’t needed[14].
- ▪Press the plunger slowly and steadily until it’s fully down.
- ▪Wait 5–10 seconds, then pull the needle straight out to prevent leakage.
Post-Injection Care
- ▪Drop the used syringe straight into a puncture-proof sharps container — never recap a needle.
- ▪Return the reconstituted vial to the fridge right away.
- ▪Rotate the injection site each day to prevent irritation and lipohypertrophy[9].
- ▪Watch the site for excess redness, swelling, or signs of infection.
Recommended Source
For high-purity research peptides, we point researchers to Prime Lab Peptides. Note: MGF is not currently listed at this supplier; the link below points to their homepage.
Why Prime Lab Peptides?
- ▪Top-rated on Trustpilot: Independently reviewed as the highest-rated peptide lab on Trustpilot — making it the best current source in the USA.
- ▪Third-party tested: Every batch ships with a Certificate of Analysis (COA) confirming purity and composition.
- ▪Consistent quality: ISO-aligned manufacturing and handling keep product integrity reliable batch to batch.
- ▪Cold-chain integrity: Temperature-controlled shipping and storage across the whole fulfilment chain.
- ▪Research-grade purity: Fit for educational and research use that demands high-quality peptides.
Note: Product availability and specifications subject to change. Verify current product details on supplier website.
References
- 1
PubMed (IGF-1 splice variants)Identification of IGF-1Ec (mechano growth factor) as a splice variant of the IGF-1 gene expressed in mechanically loaded muscle.
- 2
Journal of Physiology (PubMed)Characterization of the MGF E-domain and the distinct C-terminal sequence that differentiates it from systemic IGF-1.
- 3
PubMed (preclinical MGF)Preclinical studies of mechano growth factor administration in animal muscle models; not human dosing.
- 4
PubMed (MGF satellite cells)Studies of MGF and the E-domain peptide on muscle satellite-cell activation and proliferation in vitro.
- 5
PubMed (MGF muscle repair)Mechano growth factor and muscle repair / hypertrophy in preclinical models.
- 6
PubMed (IGF-1 receptor)Engagement of the IGF-1 receptor by full-length MGF and the proliferative effects observed in vitro.
- 7
Peptide Storage GuideBest practices for storing lyophilized peptides (temperature, humidity and light protection).
- 8
Bacteriostatic Water GuidanceBacteriostatic water for injection: multi-dose vial stability and handling.
- 9
NCBI BookshelfBest practices for subcutaneous injection: aseptic technique and site rotation.
- 10
WADA Prohibited ListClassification of growth factors such as MGF (mechano growth factor) as prohibited substances in competitive sport.
- 11
PubMed (MGF expression timing)Temporal expression of MGF (IGF-1Ec) versus systemic IGF-1Ea after mechanical loading and injury.
- 12
PubMed (PEG-MGF)Description of PEG-MGF, a pegylated longer-acting variant of mechano growth factor, in research literature.
- 13
ClinicalTrials.govTrial registry search for mechano growth factor / IGF-1Ec; no completed human efficacy trials of MGF.
- 14
Centers for Disease Control and Prevention (CDC)Subcutaneous injection technique: angle, site and no-aspiration guidance.
- 15
Subcutaneous Injection Technique (Patient Education)How to administer a subcutaneous injection: clinical technique guidelines.
- 16
Prime Lab PeptidesPrime Lab Peptides homepage — research-peptide purity specifications and certificates of analysis.
How to reconstitute MGF
- 1Wipe the vial stopper and your bacteriostatic-water vial with an alcohol swab.
- 2Draw your chosen amount of bacteriostatic water and inject it slowly down the inner wall of the MGF vial.
- 3Let it rest, then gently swirl until fully dissolved — do not shake.
- 4Refrigerate the reconstituted vial and draw each dose with a U-100 insulin syringe.
MGF — frequently asked questions
How do I reconstitute a 5 mg vial of MGF?
Wipe the stopper with an alcohol swab, then inject your bacteriostatic water slowly down the inside wall of the vial. Let it sit and gently swirl until dissolved — never shake. Store the mixed vial in the refrigerator and draw doses with an insulin syringe. Use the calculator above to turn any dose into syringe units.
How much bacteriostatic water should I add to MGF?
There is no single correct amount — more water simply spreads the same 5 mg of peptide across a larger volume, which makes small doses easier to measure accurately. 1 to 3 mL per vial is typical. Enter your chosen volume in the calculator above to see the resulting concentration and syringe units.
What do the "units" on an insulin syringe mean?
On a U-100 insulin syringe, 100 units equal 1 mL, so 1 unit equals 0.01 mL. The calculator above converts your draw volume into these units automatically so you can measure without doing the math by hand.
How should I store MGF after mixing?
Keep the reconstituted vial refrigerated at roughly 2 to 8 degrees Celsius, away from light, and avoid freezing it. Reconstituted research peptides are generally used within a few weeks. Always follow the specific guidance supplied with your product.
How many doses does a 5 mg vial of MGF provide?
Divide the vial strength of 5 mg by the amount you use per injection. The calculator above reports this as "doses per vial" the moment you enter a dose.
Is MGF approved for human use?
No. MGF is sold strictly for laboratory and research purposes and is not approved by the FDA or other regulators for human use. Everything on this page is research information, not medical advice — consult a licensed healthcare professional before any use.
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