D tier · weak
Every substantive lifespan and telomerase claim traces to a single St Petersburg research group publishing in Russian journals, with no Western replication in the two decades since, and the strongest reported effect was on maximum rather than mean lifespan.
epitalon
Epitalon is a synthetic tetrapeptide modelled on epithalamin, a pineal gland extract developed by Vladimir Khavinson's group in St Petersburg, and is claimed to activate telomerase and act as a geroprotector. Reported effects include telomere elongation in cultured human fibroblasts and modest maximum-lifespan extension in mice, but essentially all of this work originates from one research group and has not been independently replicated.
// we supply this one
available as a research reagent
≥ 99% HPLC · lyophilised powder · batch certificate published. Grade D above is our own and is not adjusted because we stock it.
the explanation
Epitalon is a four-amino-acid peptide from Russian research claiming to switch telomerase back on and slow ageing. Almost every study supporting it comes from the same one laboratory in St Petersburg, and no independent group anywhere else has ever reproduced the results.
regulatory status
Unapproved; no marketing authorisation anywhere
Epitalon holds no FDA, EMA or other regulatory approval, and unlike Semax it does not appear on Russia's essential medicines list; the related pineal extract epithalamin was used in Soviet-era Russian clinical research but the synthetic tetrapeptide is sold only as a research chemical. At the Pharmacy Compounding Advisory Committee meeting of 24 July 2026 the panel voted 7 to 5 with one abstention to recommend adding epitalon to the section 503A bulks list, against FDA staff advice. A recommendation is non-binding, confers no approval and is not a finding of efficacy; implementation would require notice-and-comment rulemaking. FDA has not published meeting minutes and these tallies are trade-press reporting from the room.
how it works · proposed mechanism
Epitalon is proposed to act at the level of gene regulation rather than through a conventional receptor.
Claimed telomerase induction
In telomerase-negative human fetal fibroblasts, Epitalon was reported to induce expression of the catalytic subunit of telomerase along with enzymatic activity and telomere elongation. This single in vitro result underpins most longevity claims made for the compound.
Overcoming the Hayflick limit
The same group reported that treated somatic cells continued dividing past their normal replicative ceiling. This has never been reproduced by an independent laboratory.
Pineal and melatonin signalling
Epitalon derives from epithalamin, a pineal gland extract, and is proposed to restore age-related decline in pineal function and melatonin rhythm. The mechanistic link between the synthetic tetrapeptide and pineal physiology is asserted more than demonstrated.
Genome stability in rodents
Treated SHR mice showed a 17.1% reduction in chromosome aberrations in bone marrow cells and a 6.0-fold lower incidence of leukaemia. Total spontaneous tumour incidence, however, was unchanged.
what’s reported
evidence shape
4 sourcesThe composition of the cited literature by study type. This describes the shape of the evidence, not its quality — and it does not by itself set the grade.
⚠ the catch
The Khavinson lifespan claims have no Western replication — in more than twenty years since the key 2003 telomerase and mouse-lifespan papers, no independent laboratory outside the originating St Petersburg group has reproduced telomere elongation, telomerase induction, or lifespan extension with this tetrapeptide. Even taken at face value the mouse data showed no change in mean lifespan and no reduction in total tumour incidence, which is a considerably weaker result than the popular framing suggests.
key published findings
- Rodent: in female Swiss-derived SHR mice, Epitalon did not change mean lifespan but increased maximum lifespan by 12.3% and lifespan of the final 10% of survivors by 13.3% (p<0.01) (Biogerontology, 2003)
- Rodent: same study found a 6.0-fold reduction in leukaemia incidence and a 17.1% decrease in bone marrow chromosome aberrations (p<0.05), but no effect on total spontaneous tumour incidence (Biogerontology, 2003)
- In vitro (human cells): addition of Epithalon to telomerase-negative human fetal fibroblast culture reportedly induced telomerase catalytic subunit expression, enzymatic activity, and telomere elongation (Bull Exp Biol Med, 2003)
- In vitro (human cells): treated human somatic cells were reported to divide beyond their normal replicative limit (Bull Exp Biol Med, 2004)
- Rodent/invertebrate: the precursor pineal extract epithalamin was reported to increase lifespan in fruit flies, mice and rats (Mech Ageing Dev, 1998)
limitations of the evidence
- Effectively the entire evidence base originates from one research group (Khavinson, Anisimov and colleagues) with no independent replication in over two decades
- Key publications are in Bulletin of Experimental Biology and Medicine and other Russian journals, limiting external methodological scrutiny and access to raw data
- No human clinical trial with hard outcomes, no human pharmacokinetic data, and no published half-life for the tetrapeptide
documented safety signals
- The originating group reported no toxicity and described long-term administration in mice as safe, but this is self-assessment by the developers rather than independent toxicology
- Telomerase activation is theoretically a tumour-permissive mechanism, and while the mouse study found reduced leukaemia it found no reduction in total tumour incidence
- No human safety data at any dose or duration
identity
| full name | Alanyl-glutamyl-aspartyl-glycine (AEDG tetrapeptide) |
| category | Longevity |
| modality | peptide |
| formula | C14H22N4O9 |
| molar mass | 390.35 g/mol |
| cas | 307297-39-8 |
| sequence | Ala-Glu-Asp-Gly |
laboratory handling
| storage | Lyophilised powder stable at -20°C protected from light and moisture; after reconstitution store at 2-8°C and use within approximately 2-4 weeks, avoiding repeated freeze-thaw cycles. |
| solubility | Freely soluble in sterile or bacteriostatic water; the short, highly polar tetrapeptide dissolves readily in aqueous buffer. |
Handling information describes laboratory practice for a research reagent. It is not a preparation guide for use in humans.
the receipts
5 citedBiogerontology · 2003 · preclinical
Bulletin of Experimental Biology and Medicine · 2003 · preclinical
Bulletin of Experimental Biology and Medicine · 2004 · preclinical
Mechanisms of Ageing and Development · 1998 · preclinical
Regulatory Affairs Professionals Society · 2026 · trade press
others in Longevity