Epithalon

What Is Epithalon?

Epithalon (Ala-Glu-Asp-Gly, also written Epitalon or AEDG) is a synthetic tetrapeptide modelled on Epithalamin, the polypeptide extract of bovine pineal gland studied by Vladimir Khavinson's group at the St Petersburg Institute of Bioregulation and Gerontology from the 1970s onward. Its headline mechanism is telomerase activation: in cultured human somatic cells, Epithalon induces transcription of the TERT gene (the catalytic subunit of telomerase), restores telomerase activity in cells where it is normally silenced, and extended telomere length by roughly 33% in some passage studies, permitting fibroblasts to complete additional divisions beyond the Hayflick limit.

Beyond the telomere findings, Epithalon acts as a bioregulator of the pineal axis. It restores age-related decline in pineal melatonin secretion, normalises the diurnal cortisol rhythm, and modulates expression of the clock genes Per1, Per2, BMAL1, and CLOCK in peripheral tissues. Animal studies report raised antioxidant defence (glutathione, superoxide dismutase), reduced lipid peroxidation, and a shift of the hypothalamic gonadotropin axis toward a younger pattern. Because the reported changes are at the level of gene expression and telomere length, the effects measured in the Khavinson cohort studies persisted well beyond the exposure period. Nearly all of the human data come from Russian-language publications.