Dihexa Peptide: Complete Guide to Synaptogenesis (2026) DIHEXA is a neurogenic peptide designed to enhance cognitive function by increasing synaptic density in the brain. Unlike stimulants that offer temporary boosts, Dihexa supports long term brain health improving communication between Could a tiny peptide actually help your brain form new connections? Meet Dihexa now available OTC in NEUROgevity. Originally designed for Alzheimer's, it promotes neuroplasticity, supports mental energy, clarity, cognitive 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