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PEG-MGF regulatory status

Current status of PEG-MGF in the United States: Removed from Category 2 (Apr 2026). In sport: WADA prohibited. Details, sources, and the dated timeline follow.

By the PeptideAgent Editorial Team. Draft, pending editorial review.  Last verified

What is the current status of PEG-MGF?

Regulatory: Removed from Category 2 (Apr 2026)WADA: WADA prohibitedVerified: Verified Sep 22, 2026
FDA and compounding
Never reviewed or approved by FDA for any use. PEG-MGF (mechano growth factor, pegylated) was nominated for the 503A bulks list and placed in 503A Category 2; the FDA Category 2 page current as of April 22, 2026 now lists it under bulk drug substances nominated but withdrawn, so it is no longer in Category 2 but is not on the bulks list and has no active nomination. It is not a component of an approved drug and has no USP monograph, so a 503A pharmacy has no lawful basis to compound it, and it is not eligible for 503B outsourcing. It is available only as a research chemical, which is not lawful for human use.
WADA
WADA prohibited
Access path
  1. No lawful United States access path identified on the last verified date; the 503A nomination was withdrawn and it is not on the bulks list.
  2. Not available as an FDA approved product and not eligible for 503B outsourcing.
  3. Products labeled research use only are not lawful for human use and are not verified for identity or purity.

Full PEG-MGF page: evidence, dosing in the literature, and sources

How has the status of PEG-MGF changed over time?

  1. WADA

    WADA publishes the 2027 Prohibited List

    WADA published the 2027 Prohibited List on September 21, 2026, and it takes effect January 1, 2027. The S2 peptide hormone and growth factor classes are unchanged. BPC-157 is still named under S0, and MOTS-c is still named under S4.4 as an activator of AMP-activated protein kinase. WADA added a note that many peptides without approval for human use fall under S0 or another section, and that a peptide not named on the list may still be prohibited. GLP-1 receptor agonists such as semaglutide and tirzepatide are still not on the list.

    Source: WADA 2027 Prohibited List
  2. FDA

    FDA lists BPC-157 and 16 other peptides as withdrawn from 503A Category 2

    FDA's Category 2 page, revised in April 2026 and current as of April 22, 2026, moved BPC-157, AOD-9604, CJC-1295, dihexa, DSIP, epitalon, injectable GHK-Cu, ipamorelin, KPV, LL-37, melanotan II, MOTS-c, PEG-MGF, selank, semax, thymosin alpha-1, and thymosin beta-4 fragment (TB-500) to a list of bulk drug substances nominated but withdrawn by their nominators. A withdrawn substance is no longer in 503A Category 2, but withdrawal is not an approval and does not place a substance on the 503A bulks list; a 503A pharmacy still needs a listing before it may compound it. Ipamorelin acetate remains in 503B Category 2. Seven of the withdrawn peptides (BPC-157, KPV, TB-500, MOTS-c, semax, epitalon, and DSIP) were taken to the Pharmacy Compounding Advisory Committee in July 2026.

    Regulatory: Removed from Category 2 (Apr 2026)Source: FDA: Certain bulk drug substances for use in compounding may present significant safety risks (503A and 503B Category 2 lists and withdrawn nominations, content current as of April 22, 2026)
  3. WADA

    WADA 2026 Prohibited List takes effect

    The 2026 WADA Prohibited List took effect on January 1, 2026 and continues to prohibit the S2 peptide hormone and growth factor classes (GHRH analogs, growth hormone secretagogues, GH fragments, IGF-1 and analogs, MGF, thymosin beta-4 and derivatives, hCG and GnRH-class releasing factors in males), myostatin inhibitors, insulin and the AMPK activator MOTS-c under S4, desmopressin under S5, and BPC-157 under S0. GLP-1 receptor agonists such as semaglutide and tirzepatide are not on the list.

    Source: WADA Prohibited List
  4. WADA

    WADA 2025 Prohibited List keeps peptide hormones and growth factors banned at all times

    The 2025 WADA Prohibited List took effect on January 1, 2025. Section S2 (peptide hormones, growth factors, related substances and mimetics) covers GHRH analogs such as CJC-1295, sermorelin, and tesamorelin, growth hormone secretagogues such as ipamorelin, GHRP-2, GHRP-6, hexarelin, and ibutamoren (MK-677), growth hormone fragments such as AOD-9604, growth factors including IGF-1 and its analogs, MGF, and thymosin beta-4 (TB-500), and chorionic gonadotropin and releasing factors such as gonadorelin and kisspeptin (prohibited in males). Myostatin inhibitors such as ACE-031 fall under S4, insulin under S4 metabolic modulators, desmopressin under S5, and BPC-157 remains an S0 non-approved substance.

    Source: WADA Prohibited List

Sources

Numbered citations in the answers above point here, followed by the regulatory sources on record for PEG-MGF and the source of each dated event.

  1. [1]FDA: Bulk drug substances used in compounding under section 503A of the FD&C Act (links to the Category 1, 2, and 3 lists and the bulks list)FDA, 2026
  2. [2]WADA Prohibited List, section S2 (names mechano growth factors)WADA, 2026
  3. [3]WADA 2027 Prohibited ListWADA, 2026
  4. [4]FDA: Certain bulk drug substances for use in compounding may present significant safety risks (503A and 503B Category 2 lists and withdrawn nominations, content current as of April 22, 2026)FDA, 2026