Epithalon is a synthetic tetrapeptide developed by Vladimir Khavinson at the St. Petersburg Institute of Bioregulation. The longevity claims come almost entirely from his lab's own work — a self-contained body of research that hasn't been independently replicated in Western peer-reviewed literature. Some animal studies show lifespan extension and telomere effects. The telomerase activation mechanism is plausible in principle. But a single lab's unpublished-from-the-mainstream results are not a reason to inject yourself. The absence of replication is the story here.