Epithalon (Epitalon)

Epithalon (also known as Epitalon) is a synthetic tetrapeptide (Ala-Glu-Asp-Gly) derived from the pineal gland peptide epithalamin. Its primary mechanism centres on the activation of telomerase — the ribonucleoprotein enzyme that adds telomere repeat sequences (TTAGGG) to chromosome ends, counteracting the progressive telomere shortening that occurs with each cell division. Telomere shortening is a hallmark of cellular ageing: when telomeres reach a critical length, cells enter replicative senescence (the Hayflick limit), ceasing to divide. Epithalon is studied for its ability to upregulate the expression of the telomerase reverse transcriptase (TERT) catalytic subunit, increasing telomerase enzyme activity and supporting telomere length maintenance in research models. Beyond telomerase activation, Epithalon is studied for its effects on pineal gland function — the pineal gland produces melatonin (the sleep-regulating hormone) and exhibits age-related decline in function. Epithalon may modulate pineal gland signalling and melatonin production, linking telomere biology to neuroendocrine ageing pathways. The peptide's dual activity — telomerase activation for cellular replicative lifespan and pineal gland modulation for neuroendocrine function — makes it a research tool for studying the intersection of cellular senescence and neuroendocrine ageing.