The U.S. Food and Drug Administration is moving toward allowing compounding pharmacies to produce more than a dozen injectable peptides that were banned because of potentially significant safety risks, the New York Stem cell, Granulocyte Colony Stimulating Factor and or Dihexa to promote limb function recovery in a rat sciatic nerve damage repair model: Experimental animal studies ScienceDirect Small molecule activation of the neurotrophin hepatocyte growth factor to treat Alzheimer disease Dihexa: A Comprehensive Guide to This Promising Peptide Dihexa Peptide: Complete Guide to Synaptogenesis (2026)