Peptides & the FDA review: your questions, answered

Not on the July 2026 agenda. A later review is anticipated (reported as early 2027); no official FDA date was confirmed as of July 2026.^{1 2}

MGF (mechano growth factor) is a natural splice variant of IGF-1 that muscle makes locally after loading or injury. PEG-MGF is a synthetic, pegylated version of the MGF E-domain peptide designed to last longer.^{3 4}

PEG-MGF is not an FDA-approved drug and has no cleared compounding pathway. It was removed from Category 2 in April 2026 but is not on the July 2026 agenda; a later review is expected.^{2 1}

Some human studies report that MOTS-c levels increase with exercise, and that lower levels correlate with obesity and higher fasting insulin. These are associations from observational research, not proof that supplementing MOTS-c produces a health benefit.⁵

The FDA-evaluated uses listed for MOTS-c are obesity and osteoporosis.⁶

MOTS-c is not an FDA-approved drug and has no cleared compounding pathway. It was in Category 2 of the interim 503A list, then removed in April 2026 and referred to the July 2026 advisory committee. Removal did not place it on the approved list.^{6 7 8}

Not on the July 2026 agenda. A later review is anticipated (reported as early 2027); no official FDA date was confirmed as of July 2026.⁵⁴

Published case reports and reviews document serious adverse events, including rhabdomyolysis, kidney injury, cardiovascular effects, and priapism, and the FDA has warned against unapproved tanning injections. No controlled trial has established a safe dose.¹²³

Melanotan II is not FDA-approved and has no cleared compounding pathway. It was removed from Category 2 in April 2026 but is not on the July 2026 agenda; a later review is expected. The FDA has warned consumers against unapproved tanning injections.⁴⁵³

It wasn't on the July 2026 agenda. Analysts of the April 2026 action expect the remaining peptides to be reviewed at a later meeting (reported as early 2027); no official FDA notice had confirmed a date as of July 2026.^{9 10}