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MGF / PEG-MGF

Growth Hormone & Muscle

MGF / PEG-MGF

Also known as Mechano Growth Factor, IGF-1Ec; PEG-MGF = pegylated version

Animal or no human dataNot approvedWADA prohibited

Price range: €98 through €195

Discussed for: Muscle repair after training.

Sequence: not listed. Modified or non-standard residues are left out on purpose.

Effect strengthHow hard it acts on the body3/10
Proof levelHow well that is shown in humans1/10
Risk levelHow much can go wrong6/10

Editorial 1 to 10 estimates from published research, not measured values. How to read these

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01 / Identity

What it is

MGF / PEG-MGF is a growth factor fragment. Main reported uses: muscle repair after training. Current status: not approved.

Molecule type
Growth factor fragment
How it is taken
Injection (SC/IM)
Other names
Mechano Growth Factor, IGF-1Ec; PEG-MGF = pegylated version

Route only. This library does not publish doses or protocols.

02 / Mechanism

How it is thought to work

IGF-1 splice variant that activates muscle stem (satellite) cells

Mechanisms seen in cells or animals do not always happen the same way in people.

03 / Potential benefits

What people use it for

Muscle repair after training

Animal or no human data

No meaningful human data. Effects and safety in people are unknown, which is not the same as safe.

Listed uses are what people use it for, not proven outcomes.

04 / Known risks

Side effects and risks

Unknown; theoretical cancer-growth risk

Risk level 6 of 10

Moderate risk score: real side effects are known, and long-term safety is not settled.

Unknown long-term effects count as a risk, not as a clean record.

05 / Regulatory

Regulatory status

Status
Not approved
Details
Not approved
Sport (WADA)
Yes: S2 (peptide hormones / GH factors)

Status reflects information up to mid-2026 and changes over time. Check current sources.

06 / Evidence quality

How good is the evidence?

Animal only

How we grade evidence

07 / Notes and sources

Notes and sources

  • Growth-factor peptides carry a theoretical risk of feeding existing cancers.
  • Animal only means effects and safety in humans are unknown, not that they are proven safe.
  • Products sold online as research peptides are unregulated. Tests of such products often find wrong amounts, impurities or a different compound.
  • Anyone using compounds like this regularly should have medical supervision and bloodwork (for example IGF-1, glucose and HbA1c, hormones, lipids).
  • Source: Peptide Reference Table, an editorial review of published research up to mid-2026. Scores are 1 to 10 editorial estimates, not measured values. Regulatory and WADA status change over time.

Educational information only. Not medical advice. Talk to a qualified healthcare professional before using any compound.

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