PG 001HGF Alternative Peptide (c Met Agonist) PeptiGrowth Inc. Dihexa is an experimental cognitive peptide that may help the brain build stronger connections between neurons instead of just temporarily boosting neurotransmitters like many nootropics do. It works through the HGF c Met pathway, Artificial human Met agonists based on macrocycle scaffolds Nature Communications Dihexa is an experimental cognitive peptide that may help the brain build stronger connections between neurons instead of just temporarily boosting neurotransmitters like many nootropics do. It works through the HGF c Met pathway,