Dihexa (PNB 0408) c Met HGFR Activator MedChemExpress Follow for more info on how to optimize your health. Dihexa gets misunderstood because people expect it to feel like stimulation. That's not what it's about. This is about adaptation, not activation. Growth factors and their peptide mimetics for treatment of traumatic brain injury ScienceDirect Big news for peptides! In July, the FDA will meet to evaluate the most commonly used peptides for FDA authorized compounding.