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Epitalon

Synthetic tetrapeptide

Also known as Epithalon, AEDG peptide, Ala-Glu-Asp-Gly

A four-amino-acid peptide carrying extraordinary longevity claims on an evidence base that is almost entirely one research group.

What doses have been studied? What each trial gave, with the population it was given to.

Guide updated Oct 22, 2026Literature checked Oct 21, 20261 curated study25 literature recordsBaseline editorial
SequenceAEDG

This entry is mechanistic only

There is no completed human trial reporting results for this compound. Everything below describes what has been observed in animals or in cell culture, and the transfer rate from those findings to humans is poor. Read the limitations on each study, not just the findings.

Overview

In shortA short synthetic peptide from work on pineal gland extracts, developed by a single research group in St Petersburg. The claims attached to it are among the largest made for anything here: switching telomerase on, extending lifespan, restoring body clock and hormone function with age. The evidence base is among the smallest, and almost all of it comes from the group that developed it.

Epitalon is a synthetic tetrapeptide derived from work on pineal gland extracts, developed by a single research group in St Petersburg. The claims attached to it are among the largest made for anything in this catalog: telomerase activation, lifespan extension, restoration of circadian and endocrine function with age.

The evidence base is among the smallest. Almost the entire literature originates from the group that developed it, spans several decades, and has essentially no independent replication. That combination should govern how the claims are read.

Mechanism

In shortThe claim is that this four-part peptide interacts with DNA directly to switch on the enzyme that rebuilds the caps on chromosomes. That is a very large claim for something this small, and not an established mechanism in biology. Switching that enzyme on is also not straightforwardly good: most human cancers do exactly that.

The proposed mechanism is that this short peptide interacts with DNA to influence gene expression, including activation of the telomerase catalytic subunit, restoring telomere length in somatic cells.

This is a large mechanistic claim for a four-residue peptide, and the proposed mode of action, direct sequence-specific DNA interaction by a tetrapeptide, is not an established mechanism in molecular biology. It has not been independently characterized.

It is also worth noting that telomerase activation is not straightforwardly desirable. Telomerase reactivation is a feature of the large majority of human cancers, and the replicative limit it circumvents is a tumor-suppressive mechanism.

Evidence

In shortLab work, from one source. Reported findings include increased enzyme activity in cell culture, longer life in rodents, and long-running human observation reporting fewer deaths in an elderly group. Independent replication is essentially absent, and the human work is not randomized and is decades old. In a literature this concentrated, consistent results carry little weight.

Mechanistic, and from one source. Reported findings include increased telomerase activity in cell culture, lifespan extension in rodents and other model organisms, and long-running human observational work reporting reduced mortality in an elderly cohort.

Independent replication is essentially absent. The human work is not randomized, is decades old, and comes from the same group. In a literature this concentrated, consistency of results carries little evidential weight, for the same reason it does not in the BPC-157 entry.

Nothing here meets the standard that would be applied to any other compound making a longevity claim.

Safety

In shortEffectively no human safety data by modern standards: no toxicity work, no immune data, no long-term follow-up. The concern is the mechanism itself. If the telomerase claim were true, switching it on permanently removes a barrier to unlimited cell replication, which is a step most cancers take. Either the claim is false, or it needs cancer safety data that does not exist.

Effectively no human safety data by modern standards. No characterized toxicology, no immunogenicity data, no long-term controlled follow-up.

The mechanistic concern is the mechanism itself. If the telomerase claim were true, then sustained systemic telomerase activation removes a barrier to unlimited cell replication, which is a step most cancers have to take. Either the claim is not true, in which case the compound does not do what it says, or it is true, in which case it warrants oncological safety data that does not exist. Both branches argue for caution.

Regulatory status

In shortNot approved anywhere. Sold as a research chemical.

Not approved anywhere. Sold as a research chemical.

The literature

1 study indexed. Findings and limitations get equal weight, on purpose.

Always check the primary source

Members area

The Epitalon literature needs an account

Everything above is free to read. What an account opens is the evidence underneath it: 1 study with their limitations, and the regimen each trial actually reported.

  • Every study, with what it found and what it cannot show
  • The limitations, given the same weight as the findings
  • The dose each named trial administered, where recorded
Create a free accountI already have one

Free to create. A membership is separate, and you can decide about that later.

Reading is free, an account is not the same as paying. 80 compound guides, every study with its limitations written underneath, and the regimens those trials actually used. A free account opens all of it. A membership is a separate decision, and it opens the forum. What membership costs.

The wider literature

25 indexed papers and 0 registered trials mentioning Epitalon, straight from PubMed and ClinicalTrials.gov. These have not been read by us. Unlike the studies above, they carry no findings and no limitations written by anyone here, because writing either would mean claiming a reading nobody has done. They are a starting point for yours.

Papers (25)

  1. Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions.

    Rahman OF, et al.Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews2026PMID 41490200

    journal articlereview

  2. LCP2 mediates SUV39H1-driven cellular senescence-related chemoresistance in natural killer/T-cell lymphoma.

    Zhang Y, et al.Cell death & disease2026PMID 42209466

    journal article

  3. Overview of Epitalon-Highly Bioactive Pineal Tetrapeptide with Promising Properties.

    Araj SK, et al.International journal of molecular sciences2025PMID 40141333

    journal articlereview

  4. The Antioxidant Tetrapeptide Epitalon Enhances Delayed Wound Healing in an in Vitro Model of Diabetic Retinopathy.

    Gatta M, et al.Stem cell reviews and reports2025PMID 40493162

    journal articleresearch support, non-u.s. gov't

  5. Epitalon increases telomere length in human cell lines through telomerase upregulation or ALT activity.

    Al-Dulaimi S, et al.Biogerontology2025PMID 40908429

    journal articleresearch support, non-u.s. gov't

  6. [Peptidergic regulation of expression of cellular aging marker proteins in buccal epithelium.].

    Ivko OM, et al.Advances in gerontology = Uspekhi gerontologii2024PMID 39742404

    journal articlereviewenglish abstract

  7. Epitalon protects against post-ovulatory aging-related damage of mouse oocytes in vitro.

    Yue X, et al.Aging2022PMID 35413689

    journal articleresearch support, non-u.s. gov't

  8. Peptides Regulating Proliferative Activity and Inflammatory Pathways in the Monocyte/Macrophage THP-1 Cell Line.

    Avolio F, et al.International journal of molecular sciences2022PMID 35408963

    journal article

  9. AEDG Peptide (Epitalon) Stimulates Gene Expression and Protein Synthesis during Neurogenesis: Possible Epigenetic Mechanism.

    Khavinson V, et al.Molecules (Basel, Switzerland)2020PMID 32019204

    journal article

  10. Short Peptides Protect Oral Stem Cells from Ageing.

    Sinjari B, et al.Stem cell reviews and reports2020PMID 31677028

    journal article

  11. [Genome instability in pulmonary tuberculosis before and after treatment].

    Dzhokhadze TA, et al.Georgian medical news2013PMID 24323970

    english abstractjournal article

  12. [Peptide Ala-Glu-Asp-Gly and interferon gamma: their role in immune response during aging].

    Lin'kova NS, et al.Advances in gerontology = Uspekhi gerontologii2012PMID 23289226

    english abstractjournal articlereview

  13. Effects of peptides Lys-Glu-Asp-Gly and Ala-Glu-Asp-Gly on hormonal activity and structure of the thyroid gland in hypophysectomized young chickens and old hens.

    Kuznik BI, et al.Bulletin of experimental biology and medicine2011PMID 22268052

    journal article

  14. Effect of tetrapeptides Lys-Glu-Asp-Gly and Ala-Glu-Asp-Gly on the structure and function of the thyroid gland in neonatally hypophysectomized chickens.

    Kuznik BI, et al.Bulletin of experimental biology and medicine2008PMID 19024016

    journal article

  15. Geroprotective effect of ala-glu-asp-gly peptide in male rats exposed to different illumination regimens.

    Vinogradova IA, et al.Bulletin of experimental biology and medicine2008PMID 19110597

    evaluation studyjournal articleresearch support, non-u.s. gov't

  16. Effect of Ala-Glu-Asp-Gly peptide on life span and development of spontaneous tumors in female rats exposed to different illumination regimes.

    Vinogradova IA, et al.Bulletin of experimental biology and medicine2007PMID 18856211

    journal articleresearch support, non-u.s. gov't

  17. Pineal peptides restore the age-related disturbances in hormonal functions of the pineal gland and the pancreas.

    Goncharova ND, et al.Experimental gerontology2005PMID 15664732

    journal article

  18. Epithalon peptide induces telomerase activity and telomere elongation in human somatic cells.

    Khavinson VKh, et al.Bulletin of experimental biology and medicine2003PMID 12937682

    journal article

  19. Effect of a synthetic pineal tetrapeptide (Ala-Glu-Asp-GLy) on melatonin secretion by the pineal gland of young and old rats.

    Djeridane Y, et al.Journal of endocrinological investigation2003PMID 12809170

    journal article

  20. Peptide Epitalon activates chromatin at the old age.

    Khavinson VKh, et al.Neuro endocrinology letters2003PMID 14647006

    journal article

  21. Gateways to clinical trials.

    Bayés M, et al.Methods and findings in experimental and clinical pharmacology2003PMID 14571286

    bibliographyjournal article

  22. Epithalon inhibits tumor growth and expression of HER-2/neu oncogene in breast tumors in transgenic mice characterized by accelerated aging.

    Anisimov VN, et al.Bulletin of experimental biology and medicine2002PMID 12428286

    journal articleresearch support, non-u.s. gov't

  23. Peptides and Ageing.

    Khavinson VKhNeuro endocrinology letters2002PMID 12374906

    journal articlereview

  24. Tissue-specific effects of peptides.

    Khavinson VKBulletin of experimental biology and medicine2001PMID 11713572

    journal article

  25. Effect of the Ala-Glu-Asp-Gly peptide on lifespan in Drosophila melanogaster.

    Khavinson VKh, et al.Doklady biological sciences : proceedings of the Academy of Sciences of the USSR, Biological sciences sections2000PMID 11103316

    journal article

Discussion

Epitalon has its own forum, and sits in Longevity & Healthspan. Every post says what kind of claim it makes.

All threads
Personal anecdote0Cited research0Question0Discussion1

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For Research & Educational Discussion Only. Not Medical Advice

This guide is educational reference material compiled from published literature. It is not medical advice, not a recommendation, and not a substitute for a clinician who knows your history. Nothing here should be used to make a decision about your own health without one.

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