Epitalon
A synthetic tetrapeptide from pineal extract that activates telomerase in cell culture and extends mouse lifespan in one Russian lab — with almost no independent human evidence
🐀 Animal
- Also known as
- Epithalon; Ala-Glu-Asp-Gly; Epithalamin fragment
- Class
- Synthetic tetrapeptide (4 amino acids)
- Sequence
- Ala-Glu-Asp-Gly
- Molecular weight
- ~390.4 g/mol
- CAS number
- 307297-39-8
- Origin
- Synthesised in the 1980s at the St. Petersburg Institute of Bioregulation and Gerontology; derived from the bovine pineal extract Epithalamin
- Primary researchers
- V.Kh. Khavinson, V.N. Anisimov, O.V. Korkushko, V.G. Morozov
- Regulatory status
- Not approved as a medicine anywhere. Sold as a dietary supplement in Russia. No WADA listing as of early 2026.
What it is
Epitalon — also written Epithalon — is a synthetic four-amino-acid peptide (Ala-Glu-Asp-Gly) created in the Soviet Union during the 1980s by Vladimir Khavinson and colleagues at the St. Petersburg Institute of Bioregulation and Gerontology. It is a simplified, chemically defined version of Epithalamin, a bovine pineal gland extract that had been reported in Soviet literature to slow ageing markers and reduce cancer rates in rodents and elderly humans. Identifying and synthesising the active fragment allowed precise, reproducible dosing and mechanistic study.
The pineal gland produces melatonin and is thought to play a role in circadian biology and, in some gerontology theories, in the pacing of biological ageing. Epitalon is stable enough for injection and, in theory, oral delivery — though oral bioavailability of short peptides is generally poor and has not been well characterised for this compound. It has attracted growing interest from longevity enthusiasts and biohackers on the strength of telomerase-activation findings in cell culture. The science behind it, however, comes almost entirely from one Russian research group, and independent replication is essentially absent.
How it works
Epitalon's primary proposed mechanism is activation of telomerase — the enzyme that adds TTAGGG repeats to chromosome ends, counteracting the progressive telomere shortening that accompanies cell division. Telomere shortening is associated with cellular senescence; in normal somatic cells, telomerase is largely silenced after development. Cell culture experiments from the Khavinson group showed that Epitalon induces hTERT (the catalytic subunit of telomerase) in human fetal fibroblasts that normally lack it, resulting in telomerase activity, telomere elongation, and extended proliferative capacity beyond the Hayflick limit. The Khavinson group proposes that Epitalon acts as a chromatin modifier, altering histone acetylation and promoter accessibility for longevity-relevant genes — though the precise signalling cascade remains incompletely characterised.
A second proposed mechanism is regulation of melatonin secretion and circadian rhythms. Korkushko and colleagues reported that Epithalamin modulated pineal function in elderly subjects, raising melatonin in those with depressed baseline activity while normalising circadian amplitude. In mouse studies, Epitalon also decreased spontaneous chromosome aberration rates in bone marrow cells, suggesting a general reduction in oxidative genomic damage.
Critically, none of these mechanisms has been confirmed by independent researchers. The path from telomerase activation in a culture dish to life extension in a living human is long and potentially hazardous — telomerase reactivation is also a hallmark of cancer.
What the research shows
The published literature spans cell culture, rodent lifespan and tumour studies, and a small number of clinical trials in elderly humans — almost all from a single institution. Below are the most important studies.
Khavinson et al. (2003) — Telomerase induction in human somatic cells
Khavinson V.Kh. et al., 2003, Bulletin of Experimental Biology and Medicine, 135(6):590–592 🧪 Cell culture (human cells)
Working with telomerase-negative human fetal fibroblasts, the researchers treated cells with Epitalon and measured hTERT expression and telomerase activity via TRAP assay, then quantified telomere length. Epitalon induced hTERT expression and telomerase activity, resulting in measurable telomere elongation and extended proliferative capacity beyond the Hayflick limit. Similar effects were observed in human embryonic kidney cells.
Limitations: Cell culture work — a long way from human biology. Telomerase activation in isolated cells does not translate to organismal life extension, and uncontrolled telomerase is a mechanism of cancer. Not independently replicated for over two decades. Authored by the Khavinson group.
Anisimov et al. (2002) — Lifespan extension and tumour suppression in HER-2/neu mice
Anisimov V.N. et al., 2002, Bulletin of Experimental Biology and Medicine, 134(2):187–190 🐀 Animal (transgenic mice)
Female FVB/N mice carrying the HER-2/neu breast cancer oncogene received Epitalon (1 mg SC, five times per week) from two months of age until death. Epitalon prolonged average lifespan by 13.5% and maximum lifespan by 13.9%. Breast adenocarcinoma incidence fell ~1.6-fold, multiple-tumour development halved, and the proportion of tumour-free animals at death increased 3.7-fold.
Limitations: HER-2/neu mice are an extreme cancer model; results may not reflect normal ageing biology. No external laboratory has replicated this lifespan extension. Mechanism is not established.
Korkushko et al. (2007) — Geroprotective effect in elderly subjects with accelerated cardiovascular ageing
Korkushko O.V. et al., 2007, Bulletin of Experimental Biology and Medicine, 142(4):426–432 🧪 Human (open-label, elderly patients)
A 12-year open-label follow-up in elderly coronary artery disease patients. Those receiving periodic Epithalamin courses (alongside standard therapy) showed 28% lower overall mortality and approximately two-fold lower cardiovascular mortality than controls, along with improvements in biological age scores and exercise tolerance.
Limitations: Open-label, no placebo or blinding. Uses Epithalamin extract rather than synthetic Epitalon tetrapeptide — results are not directly transferable. From the same St. Petersburg group; no independent replication. Open-label mortality data in elderly cohorts carry substantial confounding risk.
Rosenfeld et al. (2002) — Reduction in chromosomal aberrations in senescence-accelerated mice
Rosenfeld S.V. et al., 2002, Bulletin of Experimental Biology and Medicine, 133(3):274–276 🐀 Animal (SAMP/SAMR/SHR mice)
Epitalon was given from age two months to three mouse strains differing in ageing rate. Bone marrow chromosome aberration rates fell by 20%, 30.1%, and 17.9% in SAMP-1, SAMR-1, and SHR mice respectively (all p < 0.05) compared with age-matched controls — suggesting an antimutagenic effect that may underlie geroprotection in longer-term studies.
Limitations: Chromosome aberration frequency is a surrogate marker with an indirect link to functional human ageing. Same research group; no independent replication.
Anisimov et al. (2003) — Biomarkers of ageing and lifespan in SHR mice
Anisimov V.N. et al., 2003, Biogerontology, 4(4):193–202 🐀 Animal (female SHR mice)
Female SHR mice received repeated Epitalon courses across their lifespan. Epitalon slowed age-related loss of oestrous cyclicity, reduced bone marrow chromosome aberration frequency by 17.1%, modestly extended lifespan, and was associated with lower spontaneous tumour rates compared with controls.
Limitations: Effect sizes modest; SHR mice are an inbred strain. Same research group; no independent replication.
Korkushko et al. (2004) — Melatonin circadian rhythm in elderly subjects
Korkushko O.V. et al., 2004, Bulletin of Experimental Biology and Medicine, 137(5):601–603 🧪 Human (open-label, elderly volunteers)
Healthy elderly volunteers received Epithalamin and had 24-hour plasma melatonin profiled before and after. In subjects with low baseline melatonin, Epithalamin raised nocturnal levels and restored circadian amplitude; in those with normal baseline values, effect was neutral or mildly suppressive — consistent with a regulatory, not uniformly stimulatory, action on pineal function.
Limitations: Open-label, no placebo, small sample. Uses Epithalamin extract, not synthetic Epitalon. Functional clinical outcomes not measured.
Khavinson & Morozov (2003) — Peptides of the pineal gland and thymus: review
Khavinson V.Kh. & Morozov V.G., 2003, Neuroendocrinology Letters, 24(3–4):179–183 🐀 Animal + cell culture (review)
A foundational review from the founders of Epitalon research, covering three decades of work on pineal and thymic peptides: Epithalamin extract data in rodents and limited human trials, the derivation of Epitalon as the synthetic active fragment, and the telomerase cell culture findings. The paper argues that short organ-derived peptides exert tissue-specific gene expression effects that normalise physiology in aged tissues.
Limitations: Narrative review authored by the programme's principal investigators — not an independent assessment. The gene regulation hypothesis remains incompletely characterised. Cite-only; no separate PubMed link used here (see source 7 in list below).
Reported benefits (from research)
- Activated telomerase and lengthened telomeres in cultured human fetal fibroblasts, extending their replicative lifespan beyond the normal Hayflick limit (Khavinson et al., 2003, Bulletin of Experimental Biology and Medicine).
- Extended mean and maximum lifespan in multiple rodent strains in Khavinson group experiments, including fruit flies and mice with spontaneous tumours.
- Reduced the incidence of spontaneous mammary tumours and leukaemia in tumour-prone rodent strains in long-term studies.
- Improved circadian melatonin rhythms and normalised pineal function in aged rodents, consistent with its proposed mechanism of pineal peptide replacement.
- In limited Russian clinical trials with the parent extract Epithalamin (bovine pineal gland), researchers reported improved immune parameters and circadian rhythmicity in elderly patients.
- In cell culture, Epitalon at 1–10 µg/ml modulated gene expression in cell lines derived from various tissues, suggesting a broad epigenetic signalling role (Khavinson 2002).
Drawbacks and concerns
- The overwhelming majority of evidence comes from a single research programme (Khavinson and colleagues at the St. Petersburg Institute of Bioregulation); independent replication by unaffiliated groups is essentially absent.
- Human trial data consists of small, non-randomised or poorly controlled studies conducted in Soviet and post-Soviet Russia, with limited methodological transparency and no peer review by Western regulatory standards.
- No approved human indication exists anywhere; sold exclusively as a research chemical with no manufacturing quality control.
- Telomerase activation, while potentially beneficial in ageing, theoretically could promote cancer cell survival — the long-term oncogenic risk in humans has not been evaluated.
- Optimal dosing, route, frequency, and long-term safety in humans are entirely unknown; the "courses" used in Russian trials are not evidence-based by modern standards.
- Peptide purity in commercially sourced Epitalon is unverified; incorrect synthesis or contamination risks cannot be assessed without independent analytical testing.
Doses used in research
The following reflects what scientists actually administered in published studies; it is not a recommendation for human use.
- Khavinson cell-culture studies (e.g. Khavinson 2003, Bull Exp Biol Med): Epitalon 1–10 µg/ml applied to cultured human fetal fibroblasts in vitro.
- Korkushko elderly human trial (Korkushko 2006, Bull Exp Biol Med): Epithalamin (bovine pineal extract, not synthetic Epitalon) 10 mg intramuscularly daily for 10 days, twice per year over several years.
- Khavinson synthetic Epitalon human courses (reviewed in Khavinson 2002): Synthetic Epitalon 5–10 mg per course, administered as a series of daily injections (5–10 days), repeated 2–3 times per year in study participants.
These doses are from published research only. No safe or effective dose has been established for human use of Epitalon, and Epitalon is not approved for human use by any regulatory authority.
Safety and limitations
In animal studies, Epitalon appears well tolerated: long-term repeated dosing produced no overt toxicity, organ damage, or increased cancer rates in rodents, and no lethal dose has been established. These are mildly reassuring preclinical signals.
The human evidence is far weaker. Clinical trials from the Korkushko group were small, open-label, and unblinded. Most used Epithalamin (the raw bovine pineal extract) rather than the synthetic Epitalon tetrapeptide, so results are not directly transferable. Most importantly, none of the human work has been independently replicated outside the St. Petersburg Institute of Bioregulation and Gerontology. Essentially all positive human-level evidence for Epitalon comes from one research group over four decades, without external validation.
The telomerase activation finding deserves scrutiny. Telomerase activation in cell culture is not equivalent to life extension in an organism. Telomerase reactivation is a hallmark of cancer — approximately 85–90% of human cancers depend on it. Systemically activating telomerase in individuals with occult tumours or elevated cancer risk could accelerate tumour growth. This has not been studied in humans, and no regulatory body has approved Epitalon as a medicine anywhere. It is sold as a dietary supplement in Russia and as a research chemical elsewhere, without quality control or sterility guarantees.
Epitalon is an intellectually interesting research peptide with a coherent mechanistic hypothesis and a consistent animal literature from one group. It is not a validated anti-ageing intervention.
Sources
- Khavinson V.Kh. et al. "Epithalon peptide induces telomerase activity and telomere elongation in human somatic cells." Bulletin of Experimental Biology and Medicine, 2003;135(6):590–592. PubMed 12937682
- Anisimov V.N. et al. "Epithalon decelerates aging and suppresses development of breast adenocarcinomas in transgenic HER-2/neu mice." Bulletin of Experimental Biology and Medicine, 2002;134(2):187–190. PubMed 12459848
- Korkushko O.V. et al. "Geroprotective effect of epithalamine (pineal gland peptide preparation) in elderly subjects with accelerated aging." Bulletin of Experimental Biology and Medicine, 2007;142(4):426–432. PubMed 17426848
- Rosenfeld S.V. et al. "Effect of epithalon on the incidence of chromosome aberrations in senescence-accelerated mice." Bulletin of Experimental Biology and Medicine, 2002;133(3):274–276. PubMed 12360351
- Anisimov V.N. et al. "Effect of Epitalon on biomarkers of aging, life span and spontaneous tumor incidence in female Swiss-derived SHR mice." Biogerontology, 2003;4(4):193–202. PubMed 14501183
- Korkushko O.V. et al. "Effect of peptide preparation epithalamin on circadian rhythm of epiphyseal melatonin-producing function in elderly people." Bulletin of Experimental Biology and Medicine, 2004;137(5):601–603. PubMed 15452611
- Khavinson V.Kh. & Morozov V.G. "Peptides of pineal gland and thymus prolong human life." Neuroendocrinology Letters, 2003;24(3–4):179–183. PubMed 14523363
- Khavinson V.Kh. et al. "Epitalon increases telomere length in human cell lines through telomerase upregulation or ALT activity." PMC, 2025. PubMed 40908429
Related products & further reading
Curated books, research supplies and related products from trusted retailers. Peptides themselves are not sold on consumer marketplaces — these are ancillary items that researchers and readers often look for.
Peptide Protocols Vol. 1 — Dr. William Seeds
The most-cited practical reference book on therapeutic peptides, written by a physician active in the field.
Bacteriostatic & sterile water
0.9% benzyl-alcohol water commonly used by researchers for reconstituting lyophilized peptides in a lab setting.
Insulin syringes (0.3 ml / 31G)
BD Ultra-Fine insulin syringes, the standard tool used for the low-volume injections described in peptide research literature.
Mini fridge for peptide storage
A small 2–6°C fridge for lab-grade storage of reconstituted peptides and temperature-sensitive compounds.
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