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Epitalon Results: What Studies Measured and When

What published studies measured for Epitalon, when those outcomes were measured, and what is still unproven.

Medically reviewed by Juan Pablo Frías, MD · · DisclosureTetrapeptideUpdated

What studies measured

Each outcome below comes from a published study, with its type and size, strongest design first. Animal and cell results are labelled as such and are not human results.

Epitalon outcomes in published studies
OutcomeResultStudy typeSource
Retinitis pigmentosa clinical effectA positive clinical effect was reported in 90% of patients with degenerative retinal lesions; the abstract gives no patient numbers.Human controlled trialNeuro endocrinology letters 2002, PMID 12195242
State of knowledgeThe authors note the physico-chemical and structural literature on epitalon is limited.ReviewInternational journal of molecular sciences 2025, PMID 40141333
Spontaneous tumors and metastasesEpitalon reduced the number of mice bearing malignant tumors and no metastases appeared in treated mice.Animal · mouse (not a human result)In vivo 2006, PMID 16634527
Life span in SAMP-1Epitalon (and melatonin) lengthened survival of the longest-lived 10% in accelerated-aging mice.Animal · mouse (not a human result)Voprosy onkologii 2005, PMID 15909815
Retinal preservationRetinal structure and function were preserved about 2 times longer than controls and 30% longer than postnatal-only treatment.Animal · rat (not a human result)Bulletin of experimental biology and medicine 2003, PMID 12910293
Mean and maximum life spanEpitalon did not change mean life span in mice.Animal · mouse (not a human result)n = 108Biogerontology 2003, PMID 14501183
Maximum life spanIt increased the life span of the longest-lived 10% by 13.3% and maximum life span by 12.3%.Animal · mouse (not a human result)n = 108Biogerontology 2003, PMID 14501183
LeukemiaTotal tumor incidence was unchanged, but leukemia development was inhibited 6.0-fold.Animal · mouse (not a human result)n = 108Biogerontology 2003, PMID 14501183
LifespanEpitalon lengthened adult fruit fly lifespan by 11-16% at very low concentrations.Animal · fruit fly (Drosophila melanogaster) (not a human result)Mechanisms of ageing and development 2000, PMID 11087911
Telomere lengthEpitalon extended telomere length in normal cultured cells via hTERT and telomerase upregulation; in cancer cells, via ALT activation.In vitro (not a human result)Biogerontology 2025, PMID 40908429
Wound healing under high glucoseEpitalon restored impaired wound healing in high-glucose-injured retinal cells.In vitro (not a human result)Stem cell reviews and reports 2025, PMID 40493162
Neurogenic marker expressionAEDG (epitalon) raised mRNA expression of four neuronal differentiation markers 1.6-1.8 times in stem cells.In vitro (not a human result)Molecules 2020, PMID 32019204
Telomerase and telomere lengthEpithalon induced telomerase expression and activity and telomere elongation in cultured human fibroblasts.In vitro (not a human result)Bulletin of experimental biology and medicine 2003, PMID 12937682
Chromatin activationIn lymphocyte cultures from older donors, epitalon activated ribosomal genes and decondensed heterochromatin.In vitro (not a human result)Neuro endocrinology letters 2003, PMID 14647006
Enkephalin-degrading enzymesEpitalon inhibited serum enkephalin-degrading enzymes with an IC50 of 500 microM (Livagen 20 microM).In vitro (not a human result)Izvestiia Akademii nauk. Seriia biologicheskaia 2003, PMID 12942748
  • Epitalon (the synthetic tetrapeptide Ala-Glu-Asp-Gly) has no randomized human trial in PubMed. The only human-patient item is a 2002 Neuro Endocrinology Letters controlled study in retinal degeneration whose published summary gives no patient numbers or control design; the rest is rodent, fruit-fly or cell work, mostly from one research group.
  • Human trials of the bovine pineal extract epithalamin (RCTs of melatonin rhythm, cardiovascular aging and mortality, PMIDs 15452611, 22451889, 14523363) are a different substance and are NOT counted as epitalon evidence here.
  • No pharmacokinetic or stability data were found for epitalon.
  • Telomerase and lifespan data are from mice, flies and cultured cells. Lifespan results in the mouse study were mixed: mean life span was unchanged while maximum life span rose 12.3%.
  • Evidence for longevity is therefore animal and in-vitro only; no human evidence exists for sleep, energy or other goals. Epitalon is not FDA-approved and has no label.

Typical timeline

When measurable changes appeared in studies of Epitalon: not reported in study abstracts (PubMed search, 2 Oct 2026).

Before-and-after photos

We don't publish before-and-after photos. They can't be verified, rarely show dose, diet or other drugs, and only the most dramatic results get posted.

Common questions

How long does Epitalon take to work?

The study abstracts we summarised for Epitalon do not report when outcomes were measured (PubMed search, 2 Oct 2026).

Do you show Epitalon before and after photos?

No. Photos can't be verified, rarely show dose, diet or other drugs, and only the most dramatic ones get posted. We summarize measured outcomes instead.

More on Epitalon

DosageDoses used in published studies, with the source for each.CalculatorVial, water and dose to syringe units.PricePrice per mg and per week from dated listings. No vendor links.

Sources

  1. 1Pineal-regulating tetrapeptide epitalon improves eye retina condition in retinitis pigmentosa.Neuro endocrinology letters · 2002PMID 12195242Accessed 2 Oct 2026
  2. 2Overview of Epitalon-Highly Bioactive Pineal Tetrapeptide with Promising Properties.International journal of molecular sciences · 2025PMID 40141333Accessed 2 Oct 2026
  3. 3Effect of the synthetic pineal peptide epitalon on spontaneous carcinogenesis in female C3H/He mice.In vivo (Athens, Greece) · 2006PMID 16634527Accessed 2 Oct 2026
  4. 4[Effect of epitalon and melatonin on life span and spontaneous carcinogenesis in senescence accelerated mice (SAM)].Voprosy onkologii · 2005PMID 15909815Accessed 2 Oct 2026
  5. 5Retinoprotective effect of Epithalon in campbell rats of various ages.Bulletin of experimental biology and medicine · 2003PMID 12910293Accessed 2 Oct 2026
  6. 6Effect of Epitalon on biomarkers of aging, life span and spontaneous tumor incidence in female Swiss-derived SHR mice.Biogerontology · 2003PMID 14501183Accessed 2 Oct 2026
  7. 7Effect of epitalon on the lifespan increase in Drosophila melanogaster.Mechanisms of ageing and development · 2000PMID 11087911Accessed 2 Oct 2026
  8. 8Epitalon increases telomere length in human cell lines through telomerase upregulation or ALT activity.Biogerontology · 2025PMID 40908429Accessed 2 Oct 2026
  9. 9The Antioxidant Tetrapeptide Epitalon Enhances Delayed Wound Healing in an in Vitro Model of Diabetic Retinopathy.Stem cell reviews and reports · 2025PMID 40493162Accessed 2 Oct 2026
  10. 10AEDG Peptide (Epitalon) Stimulates Gene Expression and Protein Synthesis during Neurogenesis: Possible Epigenetic Mechanism.Molecules (Basel, Switzerland) · 2020PMID 32019204Accessed 2 Oct 2026
  11. 11Epithalon peptide induces telomerase activity and telomere elongation in human somatic cells.Bulletin of experimental biology and medicine · 2003PMID 12937682Accessed 2 Oct 2026
  12. 12Peptide Epitalon activates chromatin at the old age.Neuro endocrinology letters · 2003PMID 14647006Accessed 2 Oct 2026
  13. 13[Effect of new peptide bioregulators livagen and epitalon on enkephalin-degrading enzymes in human serum].Izvestiia Akademii nauk. Seriia biologicheskaia · 2003PMID 12942748Accessed 2 Oct 2026
  14. 14PubMed search: (epitalon[tiab] OR epithalon[tiab] OR epithalamin[tiab]) (165 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  15. 15PubMed search: (epitalon[tiab] OR epithalon[tiab] OR epithalamin[tiab]) AND (humans[mh] OR patients[tiab] OR randomized[tiab]) (58 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  16. 16PubMed search: (epitalon[tiab] OR epithalon[tiab] OR epithalamin[tiab]) AND (half-life[tiab] OR pharmacokinetic*[tiab]) (0 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026
  17. 17PubMed search: epitalon[tiab] AND (mice[tiab] OR rats[tiab] OR "life span"[tiab] OR lifespan[tiab]) (31 results)PubMed · 2026pubmed.ncbi.nlm.nih.govAccessed 2 Oct 2026

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