Peptide Knowledge Base · Recovery
PEG-MGF / MGF: what it is, what the evidence says, and its real status
A mechano-growth-factor splice variant of IGF-1 used for local muscle repair, research-only, restricted.
Short version: a local-repair splice variant of IGF-1 from the same performance corner as IGF-1 LR3. Research-only and restricted; we keep it on the Tracker, not the shelf.
Can you actually get it?
Plain-English verdict: Education only.
Regulatory status: Restricted · research-only · Education only.
Not available. PEG-MGF is a research-only IGF-1 splice variant; it sits in the restricted group on the FDA Tracker. Not FDA-approved, not compoundable, education only.
How does PEG-MGF / MGF work?
A pegylated mechano-growth-factor (an IGF-1 splice variant) proposed to drive local muscle-fiber repair and proliferation.
What it does — and what it does not do
What it does: Studied for localized muscle repair signaling.
What it does not do: It is not approved, not available, and not characterized for human safety.
How honest is the evidence?
Evidence grade D — research-only; minimal human data. Read our grading methodology for what each grade means.
What we still don't know: Human evidence is minimal; growth-signaling safety is uncharacterized.
WADA status: Banned (S2).
How it is taken
Not offered; education only.
Who should not take it
WADA S2 banned; growth-signaling risk; not characterized for human use.
Sources
Mechano-growth-factor / IGF-1 splice-variant literature; FDA compounding restriction list
Compounded medications are not FDA-approved. We keep two signals separate and never collapse them: whether you can get something, and what the rule currently says. See the live FDA Peptide Tracker or the knowledge base.
Last reviewed 2026-08-11 · Peptós.LIFE · Not medical advice.