Epitalon Peptide: Telomere & Longevity Research Guide for Canadian Labs

Epitalon (also spelled Epithalon; tetrapeptide sequence Ala-Glu-Asp-Gly) is a synthetic tetrapeptide derived from epithalamin, a polypeptide extract of the bovine pineal gland. First isolated and characterized by Professor Vladimir Khavinson at the St. Petersburg Institute of Bioregulation and Gerontology, Epitalon has been the subject of over four decades of preclinical and clinical research focused on telomere biology, longevity pathways, and neuroendocrine regulation.

This guide covers Epitalon's mechanisms, research applications, reconstitution, and dosing for Canadian research laboratories.

Epitalon is a tetrapeptide (four amino acid chain) with the sequence Ala-Glu-Asp-Gly. It is the synthetic analogue of epithalamin — a natural pineal gland polypeptide — and is considered a bioregulator peptide, a class of short peptides that interact with chromatin and regulate gene expression in a tissue-specific manner.

Molecular characteristics:

• Sequence: Ala-Glu-Asp-Gly (AEDG)
• Molecular weight: 390.35 Da
• CAS number: 307297-39-8
• Also known as: Epithalon, Epithalone, AEDG peptide

Epitalon is water-soluble, stable under standard laboratory conditions, and has been studied in both subcutaneous and intravenous administration routes in preclinical models.

The most extensively studied mechanism of Epitalon is its ability to activate telomerase (hTERT — human telomerase reverse transcriptase), the enzyme responsible for maintaining and elongating telomeres. Telomeres are the protective caps at the ends of chromosomes that shorten with each cell division; critically short telomeres trigger cellular senescence or apoptosis.

Epitalon has been shown in multiple preclinical studies to upregulate telomerase activity in somatic cells — including fetal fibroblasts, lymphocytes, and epithelial cells — leading to measurable telomere elongation. This is significant because telomerase activity is normally restricted to stem cells and germ cells in adult organisms; its reactivation in somatic cells is a key area of longevity research.

As a bioregulator peptide, Epitalon interacts directly with chromatin — the complex of DNA and histone proteins that packages genetic material. Preclinical studies suggest Epitalon modulates histone acetylation and DNA methylation patterns, effectively "resetting" age-related epigenetic drift toward a more youthful expression profile.

This chromatin-level activity is thought to underlie Epitalon's broad effects across multiple tissue types, as it can influence gene expression without altering the underlying DNA sequence.

Epitalon exerts regulatory effects on the pineal gland, stimulating the synthesis and secretion of melatonin. Melatonin production declines significantly with age — a phenomenon linked to disrupted circadian rhythms, impaired sleep architecture, and reduced antioxidant defence. By restoring pineal melatonin output, Epitalon may help normalize circadian rhythm dysregulation observed in aged animal models.

Epitalon has demonstrated antioxidant properties in preclinical models, reducing lipid peroxidation and increasing the activity of endogenous antioxidant enzymes including superoxide dismutase (SOD) and catalase. Oxidative stress is a central driver of cellular aging and telomere attrition, making this activity complementary to its telomerase-activating effects.

Research in aged animal models has shown Epitalon can partially restore age-related dysregulation of the hypothalamic-pituitary axis, including normalization of cortisol rhythms and gonadotropin secretion patterns. This neuroendocrine regulatory activity positions Epitalon as a broad-spectrum bioregulator rather than a single-target compound.

Epitalon's primary research application is in telomere biology. Studies by Khavinson et al. demonstrated that Epitalon treatment of human fetal fibroblasts resulted in:

• Increased telomerase activity (measured by TRAP assay)
• Measurable telomere elongation over serial passages
• Extended replicative lifespan compared to untreated controls
• Delayed onset of replicative senescence

These findings position Epitalon as a research tool for studying the relationship between telomerase activation, telomere length maintenance, and cellular aging.

Long-term studies in rodent models have examined Epitalon's effects on maximum lifespan. Research in both Drosophila melanogaster and rodent models has reported:

• Increased mean and maximum lifespan in treated cohorts
• Reduced incidence of age-related pathology (tumours, cardiovascular lesions)
• Improved preservation of organ function in aged animals
• Reduced all-cause mortality in some cohorts

A notable series of studies by the St. Petersburg Institute examined Epitalon administration in aged rats over 2.5-year periods, reporting significant lifespan extension compared to controls.

Epitalon has been studied in oncology models, with research suggesting it may inhibit tumour growth through multiple mechanisms:

• Normalization of melatonin secretion (melatonin has established anti-tumour properties)
• Antioxidant protection reducing mutagenic oxidative DNA damage
• Immune system modulation enhancing natural killer (NK) cell activity
• Epigenetic regulation of oncogene expression

Studies in mammary tumour models (DMBA-induced and spontaneous) have reported reduced tumour incidence and delayed tumour onset in Epitalon-treated animals.

Given its effects on pineal melatonin secretion, Epitalon has been investigated in models of circadian rhythm disruption — including shift-work simulation models and aged animals with blunted melatonin rhythms. Research has demonstrated partial restoration of melatonin amplitude and improved circadian entrainment in treated subjects.

A distinct area of Epitalon research involves retinal degeneration. Studies in retinitis pigmentosa models (RCS rats) have reported preservation of photoreceptor morphology and function in Epitalon-treated animals, attributed to its antioxidant and anti-apoptotic properties in retinal tissue.

Epitalon has demonstrated immunomodulatory effects in aged animal models, including:

• Restoration of thymic function and T-cell output
• Normalization of cytokine profiles (reduced pro-inflammatory IL-6, TNF-α)
• Enhanced NK cell cytotoxicity
• Improved antibody response to antigenic challenge

These findings are consistent with its broader bioregulator classification and suggest relevance to immunosenescence research.

Epitalon is supplied as a lyophilized (freeze-dried) powder and must be reconstituted with bacteriostatic water (BAC water) before use in research applications.

• Epitalon lyophilized powder (10mg vial)
• Bacteriostatic water (BAC water, 0.9% benzyl alcohol)
• 1mL or 2mL syringe with needle
• Alcohol swabs

1. Allow the vial to reach room temperature before opening to minimize condensation.
2. Wipe the rubber stopper of both the peptide vial and BAC water vial with an alcohol swab. Allow to dry.
3. Draw the desired volume of BAC water into the syringe. For a 10mg vial:
   • Add 1mL BAC water → concentration of 10mg/mL (10,000mcg/mL)
   • Add 2mL BAC water → concentration of 5mg/mL (5,000mcg/mL)
4. Inject BAC water slowly into the peptide vial, directing the stream down the inside wall of the vial — do not spray directly onto the powder.
5. Gently swirl the vial until the powder is fully dissolved. Do not shake vigorously.
6. Inspect the solution — it should be clear and colourless. Discard if cloudy or particulate matter is visible.
7. Label the vial with the date of reconstitution and concentration.

• Store reconstituted Epitalon at 2–8°C (refrigerated)
• Use within 4–6 weeks of reconstitution
• Protect from light
• Do not freeze reconstituted solution

The following dosing parameters are derived from published preclinical literature and are provided for research reference only. All use is strictly for in vitro and laboratory research purposes.

Preclinical and early clinical research has employed several administration patterns:

• Short course: 5–10 consecutive days, repeated 2–4 times per year
• Extended course: Daily administration for 10–12 days, 2–3 times annually
• Chronic low-dose: Ongoing low-dose administration in longevity models

Using a 10mg vial reconstituted with 2mL BAC water (5mg/mL = 5,000mcg/mL):

• A 100mcg dose = 0.02mL (20 units on a U100 insulin syringe)
• A 500mcg dose = 0.10mL (10 units on a U100 insulin syringe)
• A 1mg dose = 0.20mL (20 units on a U100 insulin syringe)

Use the Peptide-Labs Reconstitution Calculator to calculate exact volumes for your specific vial concentration and target dose.

• Store at −20°C for long-term storage (up to 24 months)
• Short-term storage at 2–8°C is acceptable (up to 3 months)
• Protect from moisture and light
• Keep in original sealed vial until use

• Refrigerate at 2–8°C immediately after reconstitution
• Use within 4–6 weeks
• Do not freeze reconstituted solution (benzyl alcohol in BAC water can precipitate)
• Inspect before each use — discard if cloudy or discoloured

Epitalon occupies a unique niche among longevity peptides as the only compound with direct evidence of telomerase activation and telomere elongation in somatic cells — a mechanism distinct from the mitochondrial and metabolic targets of MOTS-c, SS-31, and NAD+.

Epitalon is not approved by Health Canada as a drug or natural health product. It is available in Canada exclusively for in vitro research and laboratory use. Researchers should ensure compliance with institutional and regulatory requirements for peptide research.

Research-grade Epitalon should be verified by third-party analytical testing. Key quality parameters include:

• Purity ≥98% by HPLC
• Correct molecular weight confirmed by mass spectrometry
• Sterility testing for injectable-grade preparations
• Endotoxin testing (LAL assay) for cell culture applications

All Peptide-Labs products are supplied with a Certificate of Analysis (COA) confirming purity and identity. View our COA documentation for current batch results.

The majority of Epitalon research originates from a single research group (Khavinson et al., St. Petersburg Institute). While the volume of published work is substantial, independent replication by other groups remains limited. Researchers should weigh this when interpreting findings and designing experiments.

• Khavinson VKh, et al. "Epithalon peptide induces telomerase activity and telomere elongation in human somatic cells." Bulletin of Experimental Biology and Medicine. 2003;135(6):590–592.
• 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.
• Khavinson VKh, et al. "Peptide regulation of aging." Advances in Gerontology. 2005;16:60–66.
• Anisimov VN, et al. "Inhibitory effect of the peptide epitalon on the development of spontaneous mammary tumors in HER-2/neu transgenic mice." International Journal of Cancer. 2002;101(1):7–10.
• Khavinson VKh, Morozov VG. "Peptides of pineal gland and thymus prolong human life." Neuroendocrinology Letters. 2003;24(3–4):233–240.

All products are supplied exclusively for in vitro research and laboratory use. Not intended for human or veterinary use. For research purposes only.