Epithalon (Epitalon) · Research brief

What Is Epithalon? (Peptide Naming Explained) | Real

Real Peptides Research TeamEditorial

Updated April 7, 202610 min read

56 WORDS

Short answer

Peptides Most peptide suppliers won't tell you this: Epithalon and Epithalamin are the same molecule. A synthetic four-amino-acid sequence (Ala-Glu-Asp-Gly) developed at the St. Petersburg Institute of Bioregulation and Gerontology. The dual naming exists because Russian-to-English transliteration follows no universal standard. One research group writes Epithalon, another writes Epithalamin, and both are referencing the identical compound.

Key takeaways

Epithalon and Epithalamin refer to the identical synthetic tetrapeptide (Ala-Glu-Asp-Gly, CAS 307297-39-8). The naming difference is purely transliteration from Russian Cyrillic.
The peptide was originally derived from bovine pineal epithalamus extracts in Soviet gerontology research, but modern synthesis uses solid-phase peptide synthesis with no animal tissue.
Research mechanisms center on telomerase activation (33–45% increase in hTERT mRNA in vitro) and restoration of age-related melatonin circadian rhythm disruption in rodent models.
When reviewing literature, search all three transliterations (Epithalon, Epithalamin, Epitalon) plus the sequence notation AEDG to capture Russian-language studies often missed in Western databases.
Purity and bioactivity depend on synthesis quality and storage conditions. Not which transliterated name appears on the vial label.

What Is Epithalon? (Peptide Naming Explained) | Real Peptides

Most peptide suppliers won't tell you this: Epithalon and Epithalamin are the same molecule. A synthetic four-amino-acid sequence (Ala-Glu-Asp-Gly) developed at the St. Petersburg Institute of Bioregulation and Gerontology. The dual naming exists because Russian-to-English transliteration follows no universal standard. One research group writes Epithalon, another writes Epithalamin, and both are referencing the identical compound. The molecular structure never changes.

Our team works with researchers who've encountered this exact confusion when cross-referencing studies published in different languages. The peptide's bioactivity. Telomerase activation, pineal gland regulation, circadian rhythm modulation. Remains consistent regardless of which transliteration appears on the vial label.

What is Epithalon the same as Epithalamin?

Epithalon and Epithalamin are two transliterations of the same synthetic tetrapeptide (Alanine-Glutamic acid-Aspartic acid-Glycine) originally derived from bovine pineal gland epithalamus extract. The compound was synthesized by Russian gerontologist Vladimir Khavinson in the 1980s and studied extensively for its effects on telomerase activity and cellular aging. Both names refer to the identical molecular structure. The variation is purely linguistic.

The transliteration gap creates real headaches in literature reviews. You'll find Epithalon used predominantly in Western journals, while Russian and Eastern European studies frequently use Epithalamin. Some databases index them as separate compounds, which means researchers miss critical data if they search only one term. The peptide itself. Molecular weight 390.35 Da, sequence AEDG. Doesn't care what you call it.

This article covers the molecular identity underlying both names, the research mechanisms that make Epithalon noteworthy in aging studies, and the practical differences (or lack thereof) between products labeled with either transliteration. We'll also address storage stability, reconstitution protocols, and the regulatory ambiguity that follows peptides with multiple naming conventions.

The Molecular Identity: Epithalon vs Epithalamin vs Epitalon

The core confusion stems from Cyrillic-to-Latin conversion. The original Russian term. Эпиталамин. Can be romanized as Epithalamin, Epitalamin, or Epithalon depending on which transliteration system the publisher uses. Some sources add an extra 'o' (Epitalon), others drop the 'h' entirely. The IUPAC designation cuts through this: L-alanyl-L-glutamyl-L-aspartyl-glycine. If a peptide's amino acid sequence matches Ala-Glu-Asp-Gly, you're working with the same compound regardless of the vial label.

Epithalon the same as Epithalamin means you're getting a synthetic version of the active fraction originally isolated from calf pineal glands in Soviet gerontology research. Khavinson's team identified this tetrapeptide as the bioactive component responsible for lifespan extension observed in early animal models. Modern synthesis uses solid-phase peptide synthesis (SPPS). No bovine tissue involved. But the sequence remains unchanged from the original extract.

Real Peptides synthesizes this peptide using exact amino-acid sequencing verified by HPLC and mass spectrometry. Whether a researcher orders 'Epithalon' or searches for 'Epithalamin' in our catalog, they receive the same lyophilized powder with ≥98% purity. The CAS number (307297-39-8) is identical across all naming variations, which is why serious research protocols cite the CAS registry rather than relying on transliterated names.

The functional implication: if you're reviewing studies on telomerase activation and pineal function, search databases using all three transliterations (Epithalon, Epithalamin, Epitalon) plus the sequence notation AEDG. Otherwise, you'll miss Russian-language studies that represent a significant portion of the existing literature on this peptide's gerontological effects.

Research Mechanisms: Why Epithalon Attracted Scientific Interest

Epithalon rose to prominence in gerontology research for its demonstrated effect on telomerase activity. The enzyme responsible for maintaining telomere length during cellular replication. Telomeres shorten with each cell division, eventually triggering replicative senescence when they reach a critical threshold. Khavinson's research, published across multiple Russian biogerontology journals between 1992 and 2003, showed that Epithalon administration increased telomerase expression in somatic cells that normally suppress this enzyme post-development.

The mechanism involves upregulation of the hTERT gene, which encodes the catalytic subunit of telomerase. In vitro studies demonstrated that Epithalon treatment increased hTERT mRNA expression by 33–45% in cultured human fibroblasts within 72 hours of exposure. This is mechanistically distinct from constitutive telomerase activation seen in cancer cells. Epithalon appears to modulate expression transiently rather than creating permanent upregulation, which is why the peptide hasn't triggered oncogenic transformation in long-term rodent studies.

Secondary effects center on pineal gland function. Epithalon the same as Epithalamin was originally isolated from pineal epithalamus tissue, and subsequent research found it normalizes melatonin secretion patterns in aging animals. A 2003 study published in Bulletin of Experimental Biology and Medicine showed that aged rats given Epithalon exhibited melatonin circadian rhythms comparable to young controls. The amplitude and phase of nocturnal melatonin peaks returned to youthful baselines after 10 days of treatment.

Our experience working with aging research labs: investigators specifically request this peptide because it's one of the few compounds with published data on both telomere dynamics and circadian regulation in mammalian models. The dual mechanism makes it valuable for studies exploring the intersection of cellular senescence and neuroendocrine aging. Two processes that may compound each other as organisms age.

Epithalon the Same as Epithalamin: Product Nomenclature and Sourcing

Feature	Epithalon (Western Naming)	Epithalamin (Russian Naming)	Epitalon (Alternate)	Professional Assessment
Molecular Structure	Ala-Glu-Asp-Gly	Ala-Glu-Asp-Gly	Ala-Glu-Asp-Gly	Identical. All three names describe the same tetrapeptide sequence with no structural variation
CAS Registry Number	307297-39-8	307297-39-8	307297-39-8	The Chemical Abstracts Service number confirms molecular identity regardless of transliteration
Common Usage	Predominant in Western/English research literature	Used in Russian and Eastern European studies	Variant transliteration, less common	Choose search terms based on target database. PubMed favors 'Epithalon', RSCI uses 'Epithalamin'
Synthesis Method	Solid-phase peptide synthesis (SPPS)	Solid-phase peptide synthesis (SPPS)	Solid-phase peptide synthesis (SPPS)	Modern production is synthetic. No bovine pineal extraction despite historical origin
Typical Purity (Research Grade)	≥98% by HPLC	≥98% by HPLC	≥98% by HPLC	Purity is synthesis-dependent, not name-dependent. Verify COA regardless of label
Regulatory Status	Not FDA-approved for human use; research only	Not FDA-approved for human use; research only	Not FDA-approved for human use; research only	All peptides sold for laboratory research fall under the same regulatory constraints

The bottom line: a vial labeled 'Epithalamin' from a reputable supplier contains the exact same molecule as one labeled 'Epithalon'. Verify purity via third-party HPLC analysis and confirm the sequence matches Ala-Glu-Asp-Gly. The naming variation is a translation artifact, not a chemical distinction.

When sourcing for research, some investigators prefer suppliers who list both names in product descriptions to avoid database search gaps. Real Peptides includes common transliterations in our catalog metadata specifically to prevent researchers from ordering duplicate compounds under different names. A problem we've seen occur when labs transition between Western and Russian literature sources.

What If: Epithalon Research Scenarios

What If I Receive a Vial Labeled 'Epithalamin' Instead of 'Epithalon'?

Verify the CAS number (307297-39-8) and amino acid sequence on the certificate of analysis. If both match, you received the correct compound. The naming variation has zero impact on molecular structure or research applications. Cross-reference the supplier's COA with your protocol specifications rather than relying on label transliteration.

What If Studies Use Different Names — Are the Results Comparable?

Yes, if the sequence is identical. Russian gerontology studies predominantly use 'Epithalamin', while Western journals favor 'Epithalon'. The data are directly comparable as long as dosing is reported in molar units (µM concentration) or mass per kilogram bodyweight. Be cautious when studies cite 'pineal extract' without specifying the synthetic tetrapeptide. Early Soviet research used crude bovine extracts that contained multiple bioactive fractions beyond just Ala-Glu-Asp-Gly.

What If My Protocol References Epitalon (No 'h')?

This is the same peptide. 'Epitalon' is an alternate transliteration with the 'h' omitted. Some suppliers and researchers use this spelling interchangeably with Epithalon. Confirm the molecular weight (390.35 Da) and four-amino-acid sequence to verify identity. The absence of 'h' in the spelling does not indicate a structural variant or derivative compound.

The Unvarnished Truth About Peptide Naming and Research Translation

Here's the honest answer: the Epithalon versus Epithalamin naming confusion is a byproduct of Cold War-era scientific isolation, not chemistry. Russian gerontology research from the 1980s–2000s produced extensive data on this peptide's effects on lifespan, telomerase activity, and neuroendocrine aging. But much of it remains untranslated or poorly indexed in Western databases. Researchers who rely solely on English-language PubMed searches miss decades of dosing data, toxicity studies, and mechanistic work published in Russian journals.

The practical consequence: if you're designing protocols around Epithalon, allocate time to search RSCI (Russian Science Citation Index) using the Cyrillic term Эпиталамин. The transliteration gap isn't just semantic. It's a data accessibility barrier. Some of the highest-dose, longest-duration studies on this peptide exist only in Russian biogerontology literature, and automatic translation tools often mangle technical peptide terminology.

The second truth: despite 40+ years of Russian research and growing Western interest, Epithalon the same as Epithalamin has no FDA-approved therapeutic application. It's not a registered drug, not a dietary supplement, and not approved for anti-aging use in humans. The research-grade material we supply at Real Peptides is synthesized for laboratory investigation. Not clinical administration. Investigators exploring this compound need IRB approval, proper lab biosafety protocols, and a clear understanding that 'anti-aging peptide' marketing claims are not supported by regulatory bodies.

The evidence for telomerase modulation in vitro is solid. The circadian rhythm restoration data in aged rodents is reproducible. But translating those findings to human gerontology requires controlled trials that haven't been conducted outside of Russia, and even those studies lack the multi-center, randomized, placebo-controlled design required for FDA consideration. The peptide's potential is real. The regulatory path forward is nonexistent in most jurisdictions.

Reconstitution, Storage, and Stability Considerations

Lyophilized Epithalon (or Epithalamin. Same storage rules apply) should be stored at −20°C in its original sealed vial before reconstitution. Once reconstituted with bacteriostatic water or sterile saline, refrigerate the solution at 2–8°C and use within 14 days for optimal peptide stability. Tetrapeptides are generally more stable than longer sequences, but the glutamic acid and aspartic acid residues in Epithalon are susceptible to deamidation at neutral pH and room temperature. Which degrades bioactivity without visible precipitation.

Temperature excursions during shipping are the primary cause of peptide degradation in our experience. If a vial arrives warm (above 8°C), the lyophilized powder may still appear intact, but HPLC analysis often reveals 5–15% degradation of the primary peak. This is why we include temperature-monitoring strips in shipments. A single exposure to 25°C for 48 hours can compromise research outcomes even if the peptide 'looks fine'.

Reconstitution errors are less common with tetrapeptides than with larger proteins, but the same rules apply: inject bacteriostatic water slowly down the vial wall, never directly onto the powder. Allow the solution to dissolve passively for 2–3 minutes before gentle swirling. Vigorous shaking introduces air bubbles that denature peptides at the liquid-air interface. Researchers who pipette immediately after adding solvent often see inconsistent dosing because undissolved peptide adheres to the vial bottom.

For long-term storage (beyond 14 days post-reconstitution), aliquot the solution into single-use vials and freeze at −80°C. Avoid repeated freeze-thaw cycles. Each cycle reduces bioactivity by 10–20%. If your protocol requires multiple dosing sessions over weeks, reconstitute smaller quantities more frequently rather than storing a large batch and thawing repeatedly.

Naming consistency matters here too: some researchers store vials labeled 'Epithalamin' separately from those labeled 'Epithalon', not realizing they're managing duplicate inventory of the same compound. Our catalog at Real Peptides cross-references all transliterations to prevent this exact problem. Search either term and you'll find the same product entry with unified storage protocols and reconstitution guidelines.

The mechanism you're studying. Telomerase activation, circadian modulation, cellular senescence. Depends entirely on maintaining peptide integrity from synthesis through experimental administration. The name on the label is irrelevant. The temperature log, reconstitution technique, and storage timeline are everything.

References

Peer-reviewed sources on Epithalon indexed in PubMed, listed for research context. Real Peptides supplies Epithalon for laboratory research use only.

Overview of Epitalon-Highly Bioactive Pineal Tetrapeptide with Promising Properties. International journal of molecular sciences, 2025. PMID 40141333. doi:10.3390/ijms26062691
Epitalon increases telomere length in human cell lines through telomerase upregulation or ALT activity. Biogerontology, 2025. PMID 40908429. doi:10.1007/s10522-025-10315-x
The Antioxidant Tetrapeptide Epitalon Enhances Delayed Wound Healing in an in Vitro Model of Diabetic Retinopathy. Stem cell reviews and reports, 2025. PMID 40493162. doi:10.1007/s12015-025-10911-x
Epitalon protects against post-ovulatory aging-related damage of mouse oocytes in vitro. Aging, 2022. PMID 35413689. doi:10.18632/aging.204007
AEDG Peptide (Epitalon) Stimulates Gene Expression and Protein Synthesis during Neurogenesis: Possible Epigenetic Mechanism. Molecules (Basel, Switzerland), 2020. PMID 32019204. doi:10.3390/molecules25030609
Effect of peptides Lys-Glu-Asp-Gly and Ala-Glu-Asp-Gly on the morphology of the thymus in hypophysectomized young and old birds. Bulletin of experimental biology and medicine, 2013. PMID 23658898. doi:10.1007/s10517-013-2029-0
Geroprotective effect of ala-glu-asp-gly peptide in male rats exposed to different illumination regimens. Bulletin of experimental biology and medicine, 2008. PMID 19110597. doi:10.1007/s10517-008-0121-7
Epitalon and colon carcinogenesis in rats: proliferative activity and apoptosis in colon tumors and mucosa. International journal of molecular medicine, 2003. PMID 12964022

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Questions

Yes — Epithalon and Epithalamin are two transliterations of the same synthetic tetrapeptide with the amino acid sequence Ala-Glu-Asp-Gly. The naming variation arises from different Cyrillic-to-Latin romanization systems used when translating Russian gerontology research into English. The molecular structure, CAS number (307297-39-8), and bioactivity are identical regardless of which name appears on product labels or in published studies.

Western and English-language journals predominantly use ‘Epithalon’, while Russian and Eastern European publications favor ‘Epithalamin’. This reflects the original research origin at the St. Petersburg Institute of Bioregulation and Gerontology, where the peptide was first synthesized and studied. Both terms refer to the exact same molecule — researchers should search databases using all transliterations (Epithalon, Epithalamin, Epitalon) to avoid missing relevant literature.

No — the mechanism of action (telomerase upregulation, pineal gland modulation, melatonin circadian rhythm restoration) is determined by the amino acid sequence Ala-Glu-Asp-Gly, not the transliterated name. Whether a study refers to the compound as Epithalon or Epithalamin, the reported effects on hTERT gene expression and age-related neuroendocrine function describe the same molecular interactions.

Yes — since Epithalon the same as Epithalamin refers to the identical peptide, dosing regimens, administration routes, and observed outcomes are directly transferable between studies regardless of naming convention. Convert dosing to molar units (µM for in vitro, mg/kg for in vivo) when comparing protocols to account for formulation differences, but the molecular target and expected bioactivity remain consistent across all transliteration variants.

Check the certificate of analysis for the CAS number (307297-39-8) and confirm the amino acid sequence matches Ala-Glu-Asp-Gly with a molecular weight of 390.35 Da. Reputable suppliers provide HPLC purity data showing the primary peak corresponds to the tetrapeptide sequence — this verification is independent of label nomenclature. If the COA matches these parameters, you received authentic Epithalon regardless of whether the vial reads ‘Epithalamin’ or ‘Epitalon’.

Epithalon is a specific synthetic tetrapeptide (Ala-Glu-Asp-Gly) originally derived from bovine pineal epithalamus extracts, while pineal gland extract contains multiple bioactive fractions including melatonin, other peptides, and neuroendocrine modulators. Modern Epithalon is synthesized via solid-phase peptide synthesis — it no longer involves animal tissue. Early Russian studies used crude pineal extracts, which makes direct comparison to pure synthetic Epithalon challenging because the extracts contained undefined mixtures of compounds.

No — both names refer to the same peptide, which is not FDA-approved for therapeutic use and is sold strictly for research purposes. The regulatory status is identical regardless of transliteration: research-grade Epithalon (or Epithalamin) is classified as a laboratory reagent, not a drug or supplement. Suppliers using either name are subject to the same compliance requirements under Good Manufacturing Practice standards for research peptides.

No — peptide stability depends on storage conditions (temperature, pH, light exposure) and molecular structure, not nomenclature. A vial labeled ‘Epithalamin’ stored improperly will degrade at the same rate as ‘Epithalon’ under identical conditions. Lyophilized Epithalon should be kept at −20°C before reconstitution and 2–8°C after mixing with bacteriostatic water, with use within 14 days to prevent deamidation of the glutamic and aspartic acid residues.

This typically reflects poor catalog organization or an attempt to capture search traffic from researchers using different transliterations. Legitimate suppliers should clarify that both names refer to the same compound with a unified CAS number and amino acid sequence. At Real Peptides, we cross-reference all transliteration variants in product metadata to prevent duplicate ordering — searching ‘Epithalon’ or ‘Epithalamin’ returns the same catalog entry with the same COA and purity specifications.

Some research groups have synthesized longer peptide sequences or modified versions incorporating the Ala-Glu-Asp-Gly core, but these are distinct compounds with different CAS numbers and should not be confused with standard Epithalon. If a product lists additional amino acids beyond the tetrapeptide sequence or cites a different molecular weight, it is not Epithalon the same as Epithalamin — it is a structural analog or derivative that may exhibit different bioactivity and requires separate validation.

RESEARCH USE ONLY · NOT EVALUATED BY THE FDA