Dihexa (also known as PNB 0408) is an experimental small molecule derived from angiotensin IV. It was engineered to cross the bloodbrain barrier and has shown synaptogenic effects in preclinical models. The often quoted Frontiers Crosstalk Mechanisms Between HGF c Met Axis and ncRNAs in Malignancy What if neuroplasticity research targeted the HGF c Met pathway? Dihexa (PNB 0408) is an angiotensin IVderived peptide studied in preclinical models for its role in synaptogenesis and cognitive signaling mechanisms. Human data remains limited. 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,