MK-677 (Ibutamoren) FDA Status 2026: What the RFK Reclassification Means
MK-677 remains Category 2 — not part of the Feb 2026 RFK reclassification.
The 2026 Reclassification Timeline
FDA moves 19 peptides — including MK-677 (Ibutamoren) — to Category 2, effectively ending legal 503A compounding access. Concerns cited: immunogenicity risk, peptide-related impurities, limited human safety data.
HHS Secretary Robert F. Kennedy Jr announces on Joe Rogan Experience #2461 that approximately 14 of the 19 restricted peptides will move from Category 2 back to Category 1.
FDA announces the Pharmacy Compounding Advisory Committee (PCAC) will convene July 23–24, 2026 to review specific peptides for the 503A Bulks List.
FDA PCAC meets. Six of seven reviewed peptides recommended for inclusion on the 503A Bulks List. Committee recommendations are advisory, not binding.
As of August 2026, the FDA has not published the final formal reclassification. Once formalised, licensed 503A compounding pharmacies will be able to prepare reclassified peptides for patients with valid prescriptions.
What This Means for MK-677 (Ibutamoren) Patients
MK-677 (Ibutamoren) is an orally active growth hormone secretagogue. Unlike BPC-157 or the injectable GHRH peptides, MK-677 is not on the 14-peptide RFK reclassification list. It remains restricted for 503A compounding. Any "MK-677" sold online is unregulated gray-market supply.
Peptides sold online labeled "for research use only" are not manufactured under pharmaceutical quality standards, are not USP 797 sterile-compounded, and lack physician oversight. The 2026 reclassification is intended to restore access through licensed 503A pharmacies — not to legitimise the gray market.
FDA Category 2 List; RFK-14 reclassification list exclusions
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Editorial note: Content on this page is informational only and is not medical advice. Regulatory status may change; verify with a licensed pharmacist or the FDA 503A Bulks List directly. Reviewed by the Script Unlock Pharmacy Verification Team.