HEALING & REPAIRPreclinicalTELOMERASEANTI-AGINGLONGEVITY

Epithalon

Also known as: Epitalon · Epithalone · Ala-Glu-Asp-Gly

19.8k views/week 312 citations 0 edits Updated 4/6/2026

Epithalon is a synthetic tetrapeptide analog of Epithalamin — a polypeptide extract of the pineal gland — developed by Professor Vladimir Khavinson at the St. Petersburg Institute of Bioregulation. It is notable for activating telomerase, the enzyme responsible for telomere elongation, with potential longevity applications.

STRUCTURE

Molecular Composition

FORMULA
C₁₄H₂₂N₄O₉
MOL. WEIGHT
390.34 Da
SEQUENCE
Ala-Glu-Asp-Gly
CAS NUMBER
307297-39-8
ORIGIN
Pineal gland (bovine extract)
SEQUENCE LENGTH
4 amino acids
AMINO ACID CHAIN VISUALIZATION
A
Alanine
N-terminal residue
NH-CO
E
Glutamate
telomerase activation
NH-CO
D
Aspartate
pineal gland signalling
NH-CO
G
Glycine
C-terminal anchor
SEQUENCEA-E-D-G
MECHANISMS

How It Works

🧬
Telomerase Activation
Epithalon induces telomerase (TERT) enzyme activity in human somatic cells, enabling elongation of telomeres that would otherwise shorten with each cell division. Human studies show significant telomere length increases in lymphocytes of subjects aged 60–80 after treatment.
🌙
Pineal Gland & Melatonin Restoration
Epithalon is structurally modelled on epithalamin, a natural extract from bovine pineal gland. It restores melatonin secretion in aged subjects — a key upstream regulator of circadian rhythm, immune function, and antioxidant defence that declines with age.
Gene Expression & Longevity
Beyond telomeres, epithalon modulates expression of p53, Bcl-2, and oncogenes. A prospective human cohort study (n=266, age>60) showed 1.6–1.8× reduction in mortality over 6 years vs untreated controls — one of the most striking longevity signals in peptide research.
🛡
Antioxidant & Neuroprotection
Epithalon increases superoxide dismutase (SOD) and catalase activity, reducing oxidative stress markers. In CNS tissue, it protects neurons from lipid peroxidation and has been studied for retinal degeneration — showing restoration of photoreceptor ultrastructure in aged rats.
OVERVIEW

Research Overview

Epithalon was developed in Russia over several decades of research on pineal gland bioregulators. The peptide is a synthetic version of the natural tetrapeptide produced by the pineal gland epithelium, and has been studied extensively in both animal models and human trials — some spanning 15+ years — making it one of the most longitudinally studied peptide bioregulators.

Its primary claim to scientific attention is the activation of telomerase reverse transcriptase (TERT), the catalytic subunit of the telomerase complex. By elongating telomeres — the protective caps on chromosomal DNA that shorten with each cell division — Epithalon may delay cellular senescence and extend healthy cell lifespan. Human trials by Khavinson et al. showed 12–16% reductions in mortality in elderly cohorts.

Mechanism of Action

// TELOMERASE ACTIVATION

Epithalon upregulates expression of hTERT (human telomerase reverse transcriptase), the catalytic core of telomerase. This enables somatic cells — which normally lack active telomerase — to elongate shortened telomeres, reversing a key hallmark of cellular aging and reducing replicative senescence.

// PINEAL-MELATONIN AXIS RESTORATION

Epithalon restores age-related decline in pineal gland melatonin secretion by normalizing the activity of hydroxyindole-O-methyltransferase (HIOMT), the enzyme responsible for melatonin synthesis. Restored melatonin levels improve circadian rhythm regulation and antioxidant defense.

// ANTIOXIDANT & DNA REPAIR

Epithalon upregulates superoxide dismutase (SOD) and catalase expression, reducing oxidative stress. It also enhances DNA mismatch repair pathways, reducing mutation accumulation in aging tissues.

SEQUENCE

Amino Acid Sequence

Ala-Glu-Asp-Gly
DOSAGE

Dosage & Administration

INJECTABLE (SUBCUTANEOUS)
DOSE
5–10 mg/day
FREQUENCY
Daily for 10–20 days, 1–2× per year
NOTES
Most studied protocol. Course-based administration (not continuous). Reconstitute in bacteriostatic water. Inject subcutaneously, abdomen or thigh. Refrigerate after reconstitution.
INTRANASAL
DOSE
1–3 mg/day
FREQUENCY
Daily during course
NOTES
Less bioavailable than injection but preferred by some for convenience. Dilute in sterile saline. Limited pharmacokinetic data for intranasal route.

Epithalon is administered in courses rather than continuously. The most studied protocol (Khavinson et al.) used 10-day courses, 1–2 times per year. Telomere length increases have been observed in human subjects. No significant adverse events reported in clinical studies spanning up to 6 years of follow-up.

CYCLING

Cycle Duration Guide

ON CYCLE
10–20 days per course
OFF CYCLE
3–6 months between courses

Course-based use modelled on Russian clinical protocols. The goal is episodic telomerase activation rather than chronic dosing. Most practitioners use 1–2 courses per year. Response assessment is challenging without baseline/follow-up telomere length testing.

Quick Reference
FORMULAC₁₄H₂₂N₄O₉
MOL. WEIGHT390.35 Da
LENGTH4 amino acids
ORIGINSynthetic analog of pineal gland tetrapeptide Epithalamin; developed in Russia
HALF-LIFE~30 minutes plasma; subcutaneous or intranasal administration
SOLUBILITYSoluble in bacteriostatic water or saline
CAS NO.307297-39-8
STATUSPreclinical
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TAGS
telomeraseanti-aginglongevitypineal glandmelatoninDNA repair