Cortagen is a short synthetic peptide, typically composed of four amino acids, that has been studied for its potential role in cellular regulation within the central nervous system. It is part of a broader class of bioregulatory peptides investigated for their ability to influence gene expression and support neuronal function, particularly under conditions of stress and age-related decline. Current research on Cortagen focuses on its possible effects on cellular stress responses, including its interaction with oxidative stress pathways and protein homeostasis.