Epithalon (Ala-Glu-Asp-Gly, AEDG) is a tetrapeptide that has attracted research interest in cellular aging and pineal gland biology. Studies have investigated its effects on telomerase activity and telomere length, while additional research has explored its relationship with melatonin synthesis, circadian rhythms, oxidative stress, and neuroendocrine regulation. As a research-grade API, Epithalon can be supplied with product specifications and batch-specific quality documentation according to supply requirements.