Epitalon
Synthetic tetrapeptide (pineal bioregulator)
A synthetic tetrapeptide studied for its role in telomerase and aging research.
Also referenced as: Epithalon
Overview
Epitalon (also spelled Epithalon) is a synthetic tetrapeptide developed in Russia by Vladimir Khavinson and colleagues, designed as a short-peptide analog derived from studies of the pineal extract Epithalamin. It emerged from Russian peptide bioregulator research aimed at tissue-specific regulatory peptides.
At a glance
What Epitalon does
Epitalon (also spelled epithalon; sequence Ala-Glu-Asp-Gly, AEDG) is a synthetic four-amino-acid analog of the pineal polypeptide epithalamin, developed by Russian gerontologist Vladimir Khavinson. Its headline action in the research literature is telomere biology: in cultured human somatic cells it has been reported to induce expression of telomerase (the enzyme that adds TTAGGG repeats to chromosome ends) and to lengthen telomeres, with one in-vitro study describing telomere elongation of roughly one-third in aging fibroblasts. This positions it, in the framing of its proponents, as an epigenetic 'peptide bioregulator' that switches specific genes on rather than acting as a hormone.
Its second well-studied domain is the pineal gland. In aged animals and in human trials from Khavinson's group, epitalon has been reported to restore the nocturnal rhythm of melatonin secretion and to normalize circadian and neuroendocrine function that declines with age. Mechanistically it is proposed to bind DNA directly and modulate transcription of genes involved in melatonin synthesis, circadian regulation, and telomere maintenance.
The evidence must be read with caution. Much of the foundational work is preclinical (cell culture, flies, rodents) or comes from a small number of Russian clinical cohorts, and independent Western replication is sparse. Reported animal outcomes include extended lifespan in fruit flies and rats and reduced age-related chromosomal abnormalities in mice. Epitalon is not approved by the FDA or EMA and is handled as a research compound; the striking telomerase and lifespan claims should be treated as preliminary rather than established human benefits.
Effects reported in research
- Induced telomerase enzyme expression and activity in cultured human somatic cells, with reported telomere elongation of roughly 33% in aging fibroblasts (in-vitro).
- Reported to restore age-diminished nocturnal melatonin secretion in aged monkeys and in human trials from Khavinson's group.
- Proposed to bind DNA and modulate transcription of genes tied to melatonin synthesis, circadian rhythm, and telomere maintenance (mechanistic/preclinical).
- Extended lifespan in fruit flies and rats in Russian animal studies (preclinical).
- Reduced age-related chromosomal aberrations in mice (preclinical).
- Reported normalization of circadian and neuroendocrine rhythms in aged animals.
- In long-term Russian elderly cohorts (often combined with thymalin) it was associated with lower mortality over multi-year follow-up (limited clinical data, not independently replicated).
- Not FDA/EMA approved; the dramatic telomerase/lifespan findings lack robust independent Western clinical confirmation.
Effects listed reflect findings reported in the research literature — many in animal or in-vitro models. Listing an effect is not a claim of efficacy or a therapeutic indication in humans.
Mechanism of action
Epitalon is proposed to act as a peptide bioregulator influencing gene expression and pineal function. Reported preclinical mechanisms include modulation of the pineal gland and melatonin regulation, and studies have described effects on telomerase activity and telomere length in cultured human cells. The precise molecular mechanism in vivo is not fully established, and much of the mechanistic data comes from cell-culture and animal models.
Mechanistic description reflects published research-literature understanding. Much peptide research is preclinical (in-vitro or animal-model); mechanism in humans may differ and is not established for many compounds.
What it's studied for
Research contexts in which Epitalon appears in the literature. Listing a research area is not a claim of efficacy or a therapeutic indication.
Key characteristics
- Short synthetic tetrapeptide with sequence Ala-Glu-Asp-Gly (AEDG)
- Developed within the Russian peptide bioregulator research tradition
- Derived conceptually from the pineal extract Epithalamin
- Reported to increase telomerase activity in cultured human cells
- Evidence base is largely preclinical and from Russian-language literature
- No large, independent, well-controlled human clinical trials established
Reported research dosing reference only
Educational reference, not dosing guidance. The figures below summarize amounts reported in published research and research-community protocols, provided for educational and research context only. They are not medical advice, not a recommendation, and not instructions for human use. Epitalon is a research compound.
Reported research and community protocols describe short subcutaneous cycles totaling roughly 100 mg per course, repeated a couple of times per year. These are reference figures for research context only, not dosing guidance for humans.
- Common research-protocol reference: 5-10 mg/day subcutaneously for 10-20 consecutive days per cycle
- Alternate reference: 10 mg every other day for ~10 administrations (~100 mg/cycle)
Very short half-life is inferred from its small tetrapeptide size, which is part of the rationale for cyclical short-course dosing rather than a single administration.
How it compares
Epitalon is a defined 4-amino-acid pineal bioregulator peptide, distinct from thymic peptides (immune focus) and mitochondrial peptides, with a research emphasis on telomere/telomerase biology.
Commonly studied alongside
Compounds frequently researched together with Epitalon in the literature. Cross-referenced for research context — not a usage or combination recommendation.
Handling & Stability
Lyophilized peptides are stored cold, protected from light, and reconstituted only at the time of intended in-vitro work.
- Avoid repeated freeze-thaw cycles
- Verify supplier lot and Certificate of Analysis
- Follow institutional lab-safety protocols
Analytical & COA Concepts
Reputable research suppliers publish a third-party Certificate of Analysis per batch. Key analytical concepts referenced in COAs include:
Category Context
Epitalon sits in the Longevity & Cellular area of the PeptiDex library.
- Entry type: Research compound reference
- Browse the full library →
- Glossary of terms →
Where researchers source Epitalon
For researchers studying Epitalon, third-party suppliers such as Practically Natty Peptides offer research-grade material with third-party Certificates of Analysis and US-based shipping. This specific listing is currently marked out of stock — check the supplier site for current availability.
View research-supplier listing →
Outbound link to a third-party research supplier. Inclusion does not constitute endorsement; all editorial content is developed independently.
Frequently asked questions
What is epitalon and what is it studied for?
Epitalon (epithalon) is a synthetic tetrapeptide, Ala-Glu-Asp-Gly, modeled on the pineal peptide epithalamin. It is studied in aging research for reported effects on telomerase activity, telomere length, circadian/melatonin regulation, and antioxidant markers, largely in older Russian experimental programs and cell/animal models.
What is the sequence and molecular weight of epitalon?
Epitalon is the tetrapeptide Ala-Glu-Asp-Gly (AEDG), with molecular formula C14H22N4O9 and a molecular weight of about 390.35 g/mol. Its short four-residue length is one reason it is thought to have a very brief systemic half-life.
How is epitalon cycled in research protocols?
Reported research and community protocols use short cycles rather than continuous dosing, commonly a 10-20 day course repeated once or twice per year. Cycling reflects the older Russian research design of intermittent short courses rather than daily long-term administration.
What is the difference between epitalon and epithalamin?
Epithalamin is a natural peptide extract of the pineal gland, whereas epitalon (epithalon) is the short synthetic tetrapeptide derived from studying that extract. Epitalon offers a defined single-sequence molecule, making it easier to standardize in research than the multi-component extract.
Is there strong human clinical evidence for epitalon?
No large, blinded, placebo-controlled human trials have established epitalon's effects on telomere length or lifespan. Most cited data come from older Russian research programs, cell studies, and animal work, so claims should be framed as preliminary and research-stage.
Answers are educational summaries of research-literature context and do not constitute medical advice. See the Research Library, COA guide, and Storage & Handling guide for more.