What Is Cortagen Peptide? Understanding the Neuroprotective Bioregulator Cortagen peptide is a synthetic tetrapeptide bioregulator specifically designed to target and modulate central nervous system function, particularly the cerebral cortex. Composed of the amino acid sequence Ala-Glu-Asp-Pro, it belongs to the broader class of Khavinson peptides—short peptide sequences developed through decades of Russian biogerontology research that…