MGF (Mechano Growth Factor).
It is the E-domain peptide of the IGF-1Ec splice variant, sold around muscle repair interest. Swallowed, gut proteases cut it into fragments, and the record is cell and animal work.
Reviewed March 2026
- Category
- Peptide
What MGF (Mechano Growth Factor) is, and what it does.
- Does it work
- This suits people who follow peptide research closely and want to know what the name actually refers to. Human outcome data does not exist yet, so it sits in the research column.
- How much to take
- The record carries a 100 to 200mcg daily band, with 400mcg as a research condition. No human trial has set an amount, so that band comes from research use, not measured outcomes.
- Time to feel it
- Nobody has measured a timeline in people. The 83 published records are mostly cell and animal work, so there is no human onset figure to give you.
- The first dose
- Day one has nothing measured behind it in people. Swallowed peptide is broken down by gastric and pancreatic proteases within hours, which is the part the record is clear on.
- With regular use
- No human study has followed weeks of daily use, so what it does over that stretch is unmeasured. The muscle work on record is cell and animal research.
- How well tolerated
- No human safety study has been published, so tolerance over any period is unmeasured. It is a research peptide rather than a food ingredient, and a clinician is the person to ask first.
- How it feels
- There is no published human account of the subjective experience. Nobody has run the study that would describe it.
- The overlooked benefit
- It is not a separate hormone. The name refers to the E-domain of the IGF-1Ec splice variant, so reading its research means reading the IGF-1 literature.
100 to 200mcg a day is where MGF (Mechano Growth Factor) works.
Source: Goldspink, J Anat, 2003; research peptide literature
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
MGF (Mechano Growth Factor) has emerging evidence. Based on 83+ studies.
- Local expression of IGF-1 splice variants after mechanical loading of muscleAnimal study
- Muscle cell proliferation in cultureIn vitro study
- Tissue repair signalling in animal modelsAnimal study
- Survival of the intact peptide through digestion when swallowedNarrative review
- Slowed clearance of the pegylated variantNarrative review
Questions people ask about MGF (Mechano Growth Factor).
- When should I take it?
- Timing matters less than consistency. Pick a time that works for you and take it daily.
- Can I take it with other supplements?
- Usually fine. The main thing to watch is not doubling up on the same ingredient from different products. If you're on prescription meds, check with your pharmacist first.
- Any side effects to watch for?
- Most people tolerate it well at recommended doses. GI upset is the most common complaint with any supplement. Start with a lower dose and work up. If something feels off, stop and reassess.
- Who benefits most from this?
- Honestly, most people would benefit more from the basics. But if you've got a specific reason to try it, the risk is generally low.
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
An IGF-1 splice peptide signals through the PI3K and Akt arm into mTORC1, while leucine activates mTORC1 through the separate amino-acid sensing arm. The two inputs converge on the same node that switches on muscle protein synthesis.
HMB is a leucine metabolite that raises mTORC1 signalling and lowers ubiquitin-proteasome breakdown. That sits alongside growth-factor signalling on the synthesis side of the same protein turnover balance.
MGF is the loading-associated splice product of the IGF-1 gene, and anything downstream of that signal still needs amino acid substrate to build protein. Whey isolate supplies that substrate with a high leucine fraction. The rationale is mechanistic; no combination study exists.
Ascorbate is the required cofactor for the prolyl and lysyl hydroxylases that build stable collagen triple helices. Any loading-driven remodelling involves the connective tissue matrix as well as the muscle fibre, and that side is ascorbate-dependent. This is settled cofactor biochemistry and needs no combination trial.
Circulating IGF-1 tracks with zinc status in observational data, and repletion studies in low-zinc groups report IGF-1 rising. Those are marker measurements on the same axis that MGF belongs to, not outcomes. It is listed because the axis overlaps, not because a combined effect has been shown.
Vitamin D status has been associated with circulating IGF-1 and with muscle function measures in cohort work. Association, not cause, and nothing has been measured with an IGF-1 splice-variant peptide. Early is the honest label.
Arginine given intravenously raises growth hormone acutely, and growth hormone drives hepatic IGF-1 output, which is the axis the MGF splice variant comes from. Oral arginine's effect on that axis is far weaker and inconsistent. Listed for axis overlap at low confidence.
Protease preparations accelerate hydrolysis of peptide material in the gut, which works directly against any peptide taken orally. This is the same reason a peptide of this size does not survive swallowing on its own. An anti-synergy worth stating plainly rather than a pairing to build.
Glycine occupies roughly every third position in the collagen triple helix, so connective tissue remodelling draws heavily on it. That makes it substrate for the matrix side of loading-driven repair. Substrate logic only; nothing measured with this peptide.
Proline and its hydroxylated form are the other dominant residues in collagen, and they are the substrate the ascorbate-dependent hydroxylases act on. Connective tissue turnover consumes them. Substrate biochemistry, not a tested combination.
Creatine is a common companion in training-focused stacks because it acts on phosphocreatine availability, a completely different mechanism from a growth-factor peptide. The pairing is a formulation habit with non-overlapping rationales. No combination data.
Glutamine is routinely stacked in recovery formulas as a conditionally required amino acid. Its inclusion alongside a growth-factor peptide rests on general substrate reasoning rather than on any interaction. Early, and stated as habit rather than evidence.
Nothing specific on file for MGF (Mechano Growth Factor). Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What MGF (Mechano Growth Factor) actually does.
Swallow a peptide this size and digestion takes it apart before it can reach the bloodstream whole.
Attaching PEG chains to a small peptide makes the body clear it more slowly. That is why a PEG version of this peptide is sold.
MGF is not its own gene. It is one version of the IGF-1 gene's output, named for the extra tail piece that version has.
The product is just the tail piece, not the full IGF-1 molecule, so it does not work through the same receptor in the same way.
Getting MGF (Mechano Growth Factor) from food.
The whole-food sources on file. A supplement closes the gap, it does not replace dinner.
A gram-for-gram figure (how much of each you would eat to match a dose) will appear here once it is sourced and reviewed. This page will not print a number it cannot cite.
The forms it comes in.
The essence, in one line each.
- In a dexamethasone-induced muscle atrophy and microvascular rarefaction model, modulating hydrogen sulfide altered the signalling the authors describe, with IGF-1 axis components named inside the mechanism rather than studied as an intervention.Animal study. Adel M et al., 2022 (Cells). PMID 36010575 ↗
These are the studies our verdict leans on, chosen from the 1 we read for MGF (Mechano Growth Factor). The full linked list is below.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.