FDA Peptide Update: Category 2 Removals Explained The U.S. Food and Drug Administration is moving toward allowing compounding pharmacies to produce more than a dozen injectable peptides that were banned because of potentially significant safety risks, the New York Dihexa: A Comprehensive Guide to This Promising Peptide Can Dihexa Really Boost Energy and Metabolism? Did you know some preclinical studies report Dihexa showing neurotrophic activity far exceeding BDNF in laboratory assays? Research links its mechanism to HGF c Met signaling and synaptic plasticity in animal models. Human data