Epitalon (epithalon, Ala-Glu-Asp-Gly) is a synthetic 4-amino-acid peptide from Russian anti-aging research led by Vladimir Khavinson in St. Petersburg.[1][25] In cell studies it lengthened telomeres, the protective caps on chromosomes,[4][6] and in Russian animal studies it extended lifespan.[15] But nearly all research comes from one group, and FDA found no clinical studies of its safety.[1][3] It is often discussed alongside other longevity compounds such as NAD+, MOTS-c and SS-31.
What is epitalon?
Epitalon was designed from the amino-acid makeup of epithalamin, an extract of cow pineal glands. FDA treats the two as different substances, and most human studies used epithalamin, not epitalon.[1]
Epitalon and telomeres
- 2003, Russia: epitalon switched on telomerase and lengthened telomeres in human lung cells.[4]
- 2004, Russia: treated cells kept dividing past their normal limit.[5]
- 2025, UK (independent): telomeres lengthened in normal human cells via telomerase. In breast cancer cells, they lengthened mainly through a different mechanism called ALT.[6] This Brunel University team tested two breast cancer cell lines plus normal epithelial cells and fibroblasts, and declared no competing interests. It is still a dish study, not a study in people.[6]
Epitalon benefits: what human research shows
| Study | Product | Result |
|---|---|---|
| 266 older adults, 6 to 8 years | Epithalamin (extract) | 1.6 to 1.8-fold lower mortality reported[7] |
| Older heart patients, 12 years | Epithalamin | 28% fewer deaths reported[8] |
| 79 older adults, 15 years | Epithalamin | Lower mortality reported[9] |
| Older adults | Epithalamin | Raised nighttime melatonin in those with low levels[10] |
| Women on night shifts (20 treated, placebo-controlled) | Epitalon spray | Melatonin marker up 1.7-fold[11][1] |
| Retinitis pigmentosa | Epitalon | Positive effect reported in 90%; no control group described[13] |
Animal studies
- Fruit flies: lifespan up 11% to 16%, with epitalon added to the food only during the larval stage; the effect did not depend on dose.[15]
- Mice: no change in average lifespan but 12.3% longer maximum lifespan and 6-fold less leukemia in one strain;[16] fewer breast tumors in cancer-prone mice.[17] In the lifespan study, 54 female mice per group got 1 microgram on 5 days each month for life. Food intake, body weight and overall tumor rates did not change, and chromosome damage in bone marrow fell 17%.[16]
- Retina: in rats with an inherited retinal degeneration, epitalon helped preserve retinal structure and function.[13]
- Epithalamin: lifespan up 11% to 31% across flies, mice and rats.[14]
FDA criticized the mouse studies for using single fixed doses, female mice only and short total exposure.[1]
Epitalon vs epithalamin
| Epitalon | Epithalamin | |
|---|---|---|
| What it is | Synthetic 4-amino-acid peptide[1] | Extract of cow pineal glands[1] |
| Human data | Two small sublingual studies in night-shift workers; a retinitis pigmentosa report[1][11][13] | Most of the long-term mortality studies[7][8] |
| Regulatory status | Not approved; FDA reviewed it in 2026[1] | Used clinically in Russia; current registration unconfirmed[3] |
Many online claims about epitalon are based on studies of epithalamin.
Does epitalon cause or prevent cancer?
The evidence points both ways. In mice, epitalon reduced leukemia 6-fold in one strain and lowered breast tumors in cancer-prone mice.[16][17] But in a 2025 UK lab study, breast cancer cells exposed to epitalon also lengthened their telomeres,[6] and FDA warned that ongoing telomerase activation could theoretically promote cancer.[1] No standard 2-year cancer studies exist, and FDA judged the mouse studies too limited (fixed dose, female mice only, at most about 22 weeks of total dosing) to rule out cancer risk; there are no human data.[1]
Epitalon injection vs sublingual vs nasal
- Sublingual: the route used in the two small human melatonin studies of epitalon, at about 0.5 mg daily; one retinitis pigmentosa report gave it by injection next to the eye.[11][1]
- Injection: FDA found no studies of epitalon injected under the skin, the way most US users take it.[1]
- Nasal: used in older studies of epithalamin, not epitalon.[3]
Epitalon dosage
There is no approved dose. The only well-described human epitalon dose is a sublingual spray of about 0.5 mg daily for 20 days.[1][11] Older Russian studies used the extract epithalamin at 5 to 10 mg daily by injection for 10 to 20 days, repeated every 4 to 6 months.[3] To work out syringe units for a given vial, see our peptide calculator. The 10 mg courses common online come from clinics and vendors, not trials.
Epitalon side effects
- Unknown in humans: FDA found no clinical safety studies and no human pharmacokinetic data.[1]
- No adverse event reports were found in FDA’s database through December 2025.[1]
- Theoretical risks: cancer from telomerase activation, immune reactions to injected peptide, and impurities in unregulated products.[1][2]
- Pregnancy: FDA found no developmental or reproductive toxicity studies, so there are no data on use in pregnancy.[1]
Does epitalon work for insomnia?
Insomnia was the only use FDA formally evaluated. FDA staff concluded there was a lack of evidence that epitalon works for it: the human studies measured melatonin or a melatonin marker, not sleep, and none enrolled people with insomnia or used injections under the skin.[1] FDA also noted that the American Academy of Sleep Medicine’s insomnia guideline does not mention epitalon, and that several approved insomnia medicines with proven effectiveness already exist.[1]
Questions to ask a clinician
- Is my sleep problem insomnia, or something else such as sleep apnea, that needs its own treatment?
- Which approved or well-studied options fit my situation?
- What is known about the purity of the product I am considering, and how would side effects be tracked?
Is epitalon legal?
- US: not approved. Removed from FDA’s Category 2 compounding list in April 2026 after the nomination was withdrawn.[20][2][1] In July 2026, FDA advisers voted 7 to 5 (by some reports 7 to 4) to allow compounding for insomnia, overriding FDA staff, who had recommended against it.[1][18][19] FDA has not issued a final decision.
- Europe: Belgian authorities found epitalon in illegal products.[21]
- Sports: not named on WADA’s 2026 list, but as an unapproved substance it likely falls under the S0 category, which is prohibited at all times.[22]
This is general information, not legal advice.
What users report
See also thymosin alpha-1, another peptide studied for aging and immunity.
