Half-lifeNot well measured; thought to be short (minutes to hours)
Vial sizes10 mg, 50 mg
The simple version
What it does
It's claimed to slow aging by protecting the tips of your chromosomes, based on lab and animal work.
How people take it
People typically inject 5–10 mg once a day for 10–20 days, once or twice a year.
Know this
There are no solid human trials, and in the lab it lengthened telomeres in cancer cells too.
What it is
Epitalon is a lab-made chain of just four amino acids. Russian scientists led by Vladimir Khavinson designed it in the 1980s–90s to copy the active part of epithalamin, an extract from cow pineal glands (the small gland that makes melatonin). It isn't approved as a medicine anywhere.
How it works
Lab studies suggest it switches on telomerase, an enzyme that rebuilds telomeres, the protective caps on the ends of chromosomes that shorten as cells age. Animal studies also suggest it helps restore your nightly melatonin rhythm and acts as an antioxidant, protecting cells from wear and tear. Whether any of this slows aging in people is unknown.
What people use it for
Healthy aging and longevity (claimed)
Sleep and body-clock rhythm (claimed)
Telomere support (claimed)
The evidence
Mostly animal studies
In human cells in a dish, epitalon lengthened telomeres, but a 2025 UK lab study found it did this in breast cancer cells too. Russian studies reported longer average lifespans and fewer tumors in female mice. The human studies people quote mostly used the cow-gland extract, not epitalon, and came from one research group, and there are no large, independent, placebo-controlled trials of epitalon in people.
We may earn a commission from these links. Counts include one syringe and two swabs per dose.
Stay safe
Side effects
Soreness or redness where you inject
Headache
Sleepiness or vivid dreams
Long-term effects unknown
Skip it if
Current or past cancer (in the lab it can lengthen telomeres in cancer cells)
Pregnant or breastfeeding
Under 18
Interactions
Unknown. Be careful with melatonin or sleep medicines.
Get help right away for swelling of the face or throat, trouble breathing, chest pain, or a spreading, hot, red injection site.
Storage & legal
Storage
Powder: fridge or freezer. Once mixed: fridge, use within about 3–4 weeks.
Legal status
FDA: Not approved. Epitalon was placed on FDA's compounding safety-concern list in 2023, then removed in April 2026 after the nomination was withdrawn. In July 2026 an FDA advisory committee voted 7–4 to recommend allowing it in compounding; FDA had not issued a final decision when last checked.
Sport (WADA): Not approved by any health authority, so it falls under WADA's S0 (non-approved substances): prohibited at all times.
That's been reported in mice, not shown in people. Human claims mostly come from studies of a related cow-gland extract.
Is lengthening telomeres always good?
Not always. Cancer cells depend on keeping their telomeres long, which is why anyone with a cancer history should avoid it.
Why short courses instead of daily forever?
That's how the Russian research was done, and it limits your exposure to something whose long-term effects are unknown.
Sources
Khavinson VKh, et al. Epithalon peptide induces telomerase activity and telomere elongation in human somatic cells. Bull Exp Biol Med. 2003;135(6):590-2. PubMed 12937682
Al-Dulaimi S, et al. Epitalon increases telomere length in human cell lines through telomerase upregulation or ALT activity. Biogerontology. 2025;26(5):178. PubMed 40908429
Anisimov VN, 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
Araj SK, et al. Overview of Epitalon-Highly Bioactive Pineal Tetrapeptide with Promising Properties. Int J Mol Sci. 2025;26(6):2691. PubMed 40141333
Khavinson VKh, et al. Peptides of pineal gland and thymus prolong human life. Neuro Endocrinol Lett. 2003;24(3-4):233-40. PubMed 14523363
US FDA. Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety Risks. Source