MGF

MGF (Mechano Growth Factor) is a splice variant of insulin-like growth factor 1 (IGF-1), specifically the isoform labeled IGF-1Ec. It sits within the broader growth factor family of proteins studied for their roles in cell growth and repair signaling. In published research, MGF is examined as a distinct research compound, and it carries no approval for use in humans or animals.

In plain terms: MGF is a lab-made version of a natural growth-factor signal related to IGF-1. Researchers study it in connection with muscle-tissue repair processes and the activation of satellite (muscle stem) cells, using it strictly as a research reagent. It is not an FDA-approved product, is not intended for human or animal use, and nothing here describes or recommends administering it.

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MGF (Mechano Growth Factor)

MGF (Mechano Growth Factor) is a splice variant of IGF-1 referenced in exercise-physiology and cell-signaling literature. Like other peptides sold in lyophilized form, it ships as a sealed vial intended for laboratory reconstitution — not as a ready-to-use solution.

Reconstitution setups for MGF typically pair a bacteriostatic water diluent with a standard 3 ml glass cartridge. Our pens take standard 3 ml (300-unit) glass cartridges with the 11 mm long plunger (stopper), the cartridge we sell. 3 ml cartridges are also made with a shorter, about 8 mm plunger, and a pen is built for one height, so check that a cartridge from another source has the 11 mm long plunger before loading it; the glass looks identical from the outside.

Draw and transfer devices use universal 28G–33G screw-on pen needles, which fit any pen accepting that standard thread. All hardware here is intended strictly for research and laboratory workflow, not for administration.

What it is

MGF, or Mechano Growth Factor, is a form of insulin-like growth factor 1 (IGF-1) — a natural protein the body produces to support cell growth and repair. The specific splice variant studied in labs is designated IGF-1Ec. Structurally, MGF is a short peptide (a chain of amino acids) that muscle tissue produces locally in response to mechanical stretch or micro-damage, placing it within the broader growth factor family.

A synthetic variant, PEG-MGF, is modified through a PEGylation process — attaching a polyethylene glycol molecule to the peptide backbone. This is comparable to a slow-release coating: it reduces the rate at which the peptide is broken down, a property relevant to laboratory handling, formulation stability studies, and experimental timeline planning.

Key point: MGF is a research compound under investigation. It is banned by WADA (the World Anti-Doping Agency) and is not approved for use in humans.

Research context and categorization

MGF (Mechano Growth Factor) is categorized in research literature as a splice variant of IGF-1, also referenced under the name IGF-1Ec, and is grouped with growth factors studied for their role in tissue-repair signaling. Investigators most often study it in relation to skeletal muscle, focusing on satellite cells — muscle stem cells that remain dormant until signaled to help build or repair tissue.

• Activation signal: Early work by Yang and Goldspink identified a fragment of MGF, the E-peptide, associated with activating resting satellite cells in lab models of muscle injury and mechanical stretching. This mechanistic link is frequently cited in exercise-physiology and regenerative-biology literature discussing MGF's classification.
• Signaling type: MGF is classified as a locally acting autocrine and paracrine signal — meaning research describes it acting on the cell that produced it, or on nearby cells, rather than circulating through the bloodstream.
• Contrast with IGF-1: This local mode of action is distinct from systemic IGF-1, which circulates more widely and is more closely associated with cell maturation.

These classifications describe investigational research findings only, not confirmed benefits. Outcomes observed in cell-culture and animal studies have not been established as safe or effective in humans, and none of this information describes or supports human or animal use.

Status

• Regulatory status: Research-use-only. MGF and PEG-MGF are not approved by the FDA for any human or veterinary use, and neither compound is marketed, labeled, or intended for those purposes.
• Sport status: Prohibited under the WADA Prohibited List. Mechano growth factors are named explicitly in Section S2, under peptide hormones, growth factors, related substances, and mimetics (growth factors and growth factor modulators), and are banned at all times, both in-competition and out-of-competition.
• Legal status: Classification of research peptides varies by country, state, and institution, and can change without notice. Researchers are responsible for confirming current regulations in their own jurisdiction before acquiring, storing, or handling any research compound.

Reconstitution notes (general)

A lyophilized peptide is simply a freeze-dried powder. All moisture has been removed to keep it stable on the shelf. Reconstitution is the lab-bench step of adding a preserved diluent, commonly bacteriostatic water, back into the vial before it is used at the bench. Bacteriostatic water, along with full reconstitution kits, is stocked separately in our hardware catalog for this exact step.

The resulting concentration equals the peptide mass in the vial (mg) divided by the diluent volume you add (ml). Use the peptide calculator to work out concentration from your vial size and water volume.

Bacteriostatic water's preservative is typically 0.9% benzyl alcohol, included to inhibit bacterial growth across repeated draws from the same vial; it is a diluent additive, not a reagent that reacts with the peptide. Once reconstituted, store vials refrigerated and shielded from light. Cloudiness or an unexpected color change after mixing is a general sign of degradation rather than a normal reconstitution outcome, and that vial should be discarded rather than carried forward in the workflow.

Dilution and handling notes (compound-specific)

Reconstitution Ratio

MGF and PEG-MGF are typically supplied as a freeze-dried powder in 2 mg vials for laboratory reconstitution. Bacteriostatic water is the standard diluent, most often added at roughly 1 to 2 mL per vial. This ratio keeps the resulting solution at a concentration that is straightforward to measure with standard graduated syringes and well within the solubility range of the small peptide mass involved.

Mixing Technique

This peptide dissolves readily and does not typically gel or clump the way some larger or more hydrophobic peptides can. For best results, direct the water stream slowly along the inside wall of the vial rather than onto the powder itself, then swirl or roll the vial gently to bring it into solution.

Avoid shaking, which can introduce excess foaming and may denature the peptide through mechanical stress. If fine particles remain visible, a few additional minutes of slow rotation is usually sufficient.

Stability and Quality Control

Native (non-PEGylated) MGF has a notably short half-life once in solution, which is the primary reason the PEG-MGF variant exists for research applications requiring extended solution stability. Reconstituted vials should be labeled immediately with the date and refrigerated without delay.

Benzyl alcohol, the preservative in most bacteriostatic water, is generally compatible with peptide solutions and helps inhibit microbial growth during storage, though it does not prevent gradual peptide degradation over time. A properly reconstituted solution should remain clear and colorless throughout its working life; cloudiness, discoloration, or visible particulates indicate the solution should be discarded and a fresh vial prepared.

Handling and storage

Proper handling preserves peptide integrity from reconstitution through use:

• Store the sealed freeze-dried vial cold, and keep the reconstituted solution refrigerated at 2 to 8 C, out of direct light.
• Wipe the rubber stopper with an alcohol swab and let it dry before drawing water.
• Label the vial with the mix date.
• Reconstituted peptide is generally considered usable for roughly a 4-week window under refrigeration, and should not be frozen once mixed.
• A shift in color, clarity, or the appearance of particulate/floaters signals degradation - discard the vial rather than guess. Peptides vary in color-sensitivity, and light or temperature exposure can change a solution's appearance before other signs show.
• Reconstitution diluent matters: bacteriostatic water with benzyl alcohol acts as a preservative, not a stabilizer, and formulation choice can affect how a given peptide holds up in solution.

Frequently asked questions