Petersburg Institute of Bioregulation and Gerontology, epithalon is a synthetic tetrapeptide (a sequence of four amino acids) that has been shown to induce telomerase activity and telomere elongation in human somatic cells [1]
[DOI] [PMC free article] [PubMed] [Google Scholar] 205.Guralnik J, Ershler W, Artz A, et al
10.1111/j.1749-6632.1987.tb23750.x Ann N Y Acad Sci
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This tetrapeptide consists of four amino acids: alanine, glutamic acid, aspartic acid, and glycine