Peptides: FDA Approved vs Research Peptides Not all peptides are created equal Some are FDA approved medications with real clinical data, regulated manufacturing, and proven safety. Others are sold online as Is Dihexa an approved and safe treatment for cognitive impairment or neurodegenerative diseases such as Alzheimer disease? Dihexa Capsules LeadWest Medical 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 What is dihexa, its mechanism of action via the HGF c Met pathway, and its safety and clinical use?