Epitalon (also known as Epithalon or Epithalamine) is a synthetic tetrapeptide (Ala-Glu-Asp-Gly) designed to mimic the pineal peptide epithalamin. Developed by Russian researcher Professor Vladimir Khavinson, epitalon is studied for its effects on telomerase activation, pineal gland function, and circadian rhythm regulation in aging research. Cell culture and animal studies have explored epitalon's role in telomere elongation through telomerase reverse transcriptase induction, with proposed applications in cellular senescence and age-related endocrine decline research. The peptide was removed from FDA Category 2 restriction in April 2026. Epitalon is typically supplied as a lyophilized powder for reconstitution in research-grade applications.