Dihexa Research Grade Neurotrophic Molecule 20 mg PRG Can Dihexa Really Boost Energy and Metabolism? 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 Brain peptides in Alzheimer's disease pathophysiology and therapeutic advances Cell and Tissue Research Springer Nature Link Introducing Dihexa! Originally developed for age related cognitive support, Dihexa is a peptide often studied for its potential to strengthen memory pathways, improve learning capacity, promote healthy neural growth, and support long term brain