Epitalon, also known as Epithalon or Epithalone, is a synthetic tetrapeptide with the sequence Ala-Glu-Asp-Gly. It is an analogue of the natural pineal gland peptide Epithalamin. This compound is designed to mimic the activity of the pineal gland's regulatory peptides. Its primary research and proposed application is as a potential geroprotective and neuroprotective agent. Epitalon is studied for its ability to potentially stimulate the production of telomerase, an enzyme associated with telomere maintenance, and to regulate the secretion of melatonin and other hormones. These mechanisms underlie its investigation for potential effects on slowing aging processes, improving sleep patterns, and supporting cognitive function in age-related decline. It is often categorized among experimental peptides and nootropics. Due to its peptide nature and specific biological target, it is primarily considered in the context of pharmaceutical research and development for neurological and age-related conditions, rather than as a general chemical building block.