Epithalon (Epitalon) is a synthetic four-amino-acid peptide modeled after epithalamin, a hormone secreted by the pineal gland. In laboratory research models, it is primarily investigated for its ability to activate telomerase, the enzyme responsible for elongating and repairing chromosome telomeres to delay cellular aging. It is utilized to evaluate telomeric stability, circadian rhythm regulation, melatonin secretion pathways and general oxidative stress reduction.