The Peptide Craze Ground Truths Follow for more info on how to optimize your health. Dihexa gets misunderstood because people expect it to feel like stimulation. That's not what it's about. This is about adaptation, not activation. 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 FDA's Overreach on Compounded Peptides Peptides for Mental Health & Cognitive Function (2026)