Epithalon is a synthetic tetrapeptide made of four amino acids (Ala-Glu-Asp-Gly) that is studied in longevity and cellular health research. It has been explored for its potential to stimulate telomerase activity and support telomere maintenance, which are involved in cellular aging processes. Research also suggests it may support pineal gland function and natural melatonin production to help with sleep and circadian rhythm balance, along with possible antioxidant activity that supports healthy cellular function.