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Epn2.5
Epitalon Research
Mostly mechanism / observationalLimited safety
11 peer-reviewed studies
What the evidence says
Mostly mechanism / observational
Most Epitalon studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from mixed-quality randomised trials published 2001–2025.
Based on 11 studies · 1 RCT
Confidence
Low
By outcome
Longevity & aging
Mostly mechanism / observational7 studies
Circadian rhythm & jet lag
Mostly mechanism / observational3 studies
Safety profile
Too few graded studies2 studies
Slowing down
Only 1 study in the last 5 years
200120132025
1Review2025
It remains uncertain whether these are the sole mechanisms of action of this compound ... the quantity of physico-chemical and structural investigations of this peptide remains quite limited.
Animal study in senescence-accelerated mice (SAMP-1/SAMR-1), originating group
Subcutaneous epitalon (1 µg/mouse) and melatonin reportedly extended survival in the last 10% of senescence-prone mice and prevented estrous-cycle disturbances
Predominant tumor type (malignant lymphoma) frequency not significantly changed
4Animal2001
[Epithalon] decelerated free radical processes, prolonged the mice life span with an accompanying drop in spontaneous tumour incidence.
Anisimov VN, Khavinson VKh, Zavarzina NIu, Zabezhinskiĭ MA, Zimina OA, Popovich IG. · Ross Fiziol Zh Im I M Sechenova (2001)
Animal study: female CBA mice given subcutaneous Epithalon from 6 months of age until death (originating group)
No change in body weight or food intake; slowed age-related loss of estrous function and lowered body temperature
Reported prolonged lifespan and reduced spontaneous tumor incidence
5In Vitro2012
Epithalone stimulated AANAT and pCREB synthesis and increased melatonin level in culture medium.
Epithalamin ... and its active fragment, epitalon (Ala-Glu-Asp-Gly) ... have an antioxidant mechanism that is quite different from the action of melatonin.
Pineal peptides reportedly raised total antioxidant/antiradical activity and antioxidant enzymes (SOD, glutathione peroxidase) in serum, liver and brain
Proposed antioxidant contribution to the 'geroprotective' effect
Addition of Epithalon peptide in telomerase-negative human fetal fibroblast culture induced expression of the catalytical subunit, enzymatic activity of telomerase, and telomere elongation.
Follow-up in-vitro study in human fetal pulmonary fibroblasts (same group)
Epithalon reportedly elongated telomeres in aging cells back toward early-passage length
Treated cells made ~10 extra passages, framed as 'overcoming the Hayflick limit'
9RCT2006
After 12 years the number of elderly subjects dead in the group treated by epithalamine was 28% lower than in the control group, despite the same basic therapy.
12-year clinical study (indexed RCT) in elderly coronary patients with accelerated cardiovascular aging, by the originating group
Reported lower all-cause and cardiovascular mortality and improved exercise tolerance vs control
Used epithalamine (the pineal extract), not the pure Epitalon tetrapeptide
10Observational2007
Peptide preparations of the pineal gland (Epithalamin ... and Epitalon ...) recover night release of endogenous melatonin and lead to the normalization of the hormone circadian rhythm in the blood plasma.
Homeostasis restoration was accompanied by ... decreased mortality rate during observation ... 1.6-1.8-fold in the Epithalamin-treated group ... as compared to the control.
Khavinson VKh, Morozov VG. · Neuro Endocrinol Lett (2003)
Long (6-8 year) clinical observation in 266 elderly subjects by the originating institutes
Reported reduced mortality and lower incidence of cardiovascular/respiratory disease with pineal (Epithalamin) and thymic (Thymalin) peptides
Studied the crude pineal extract Epithalamin, NOT the pure Ala-Glu-Asp-Gly peptide