Epithalon (Epitalon) · Research brief

Can You Buy Epitalon? Where to Buy Epithalon Explained

Real Peptides Research TeamEditorial

Updated September 8, 20269 min read

59 WORDS

Short answer

Epitalon and epithalon are the same molecule, and that spelling split is the single most common source of confusion in this corner of the research peptide market. Both names point to AEDG, the synthetic tetrapeptide Ala-Glu-Asp-Gly, four amino acids long, first described by Vladimir Khavinson's group at the St. Petersburg Institute of Bioregulation and Gerontology. Two spellings. One compound.

Key takeaways

Epitalon and epithalon are two transliterations of one synthetic tetrapeptide, Ala-Glu-Asp-Gly, so buyers comparing them are comparing the same compound under two spellings.
HPLC purity and net peptide content are separate figures: a vial can read 99% pure and still be only 70–80% peptide by mass because of residual water and trifluoroacetate counterions.
Anyone about to buy epithalon should require a lot-specific certificate of analysis with mass spectrometry confirmation, because a purity number without a matching mass trace proves nothing about identity.
Thymalin is an extracted polypeptide fraction rather than a defined sequence, which means its specification rests on fraction consistency and contaminant testing instead of a single HPLC peak.
Lyophilised bioregulators are held at −20°C or colder, while reconstituted solutions move to 2–8°C and should be aliquoted to avoid repeated freeze–thaw cycles.
Epithalon, thymalin, thymulin and cartalax are research-use-only compounds and are not FDA-approved drugs for human or veterinary use, so the decision to buy epithalon is a laboratory procurement decision, not a health one.

We supply research-grade peptides to laboratories, and this question arrives in our inbox every week. Our team has found that availability is almost never the real problem. Verification is. Placing an order takes ninety seconds; establishing what is genuinely inside the vial is where all the work sits.

Can you buy epitalon (epithalon)?

Yes. You can buy epithalon as a research-use-only compound from peptide suppliers. It is not an FDA-approved drug and is not sold for human or veterinary consumption. Legitimate suppliers ship it as a lyophilised powder with a lot-specific certificate of analysis reporting HPLC purity, commonly specified at 98% or higher, plus mass spectrometry confirmation.

One thing that short answer hides: 'research grade' is not a regulatory category with a legal definition. It's a claim, and the only thing standing behind it is lot-specific documentation. So the genuinely useful question isn't whether you can buy epithalon, it's how to tell a synthesis operation from a relabeller. This article covers what each of the four Khavinson-class bioregulators actually is, how to read a certificate of analysis so the numbers mean something, and the storage and import realities that decide whether the material in your freezer still matches its spec sheet.

The four bioregulators buyers keep confusing

Epithalon, thymalin, thymulin and cartalax share a research lineage, Khavinson's peptide bioregulator programme, but they are structurally unrelated and not interchangeable in a study design.

Epithalon (epitalon, AEDG) is a synthetic tetrapeptide, Ala-Glu-Asp-Gly, molecular formula C14H22N4O9. The published work from Khavinson's group examined pineal signalling, circadian rhythm and telomerase activity in cultured human somatic cells. That literature is real, largely Russian-language, and thinly replicated outside it. Researchers who buy epithalon are buying into an open line of inquiry, not a settled result.

Cartalax is a tripeptide, Ala-Glu-Asp (AED), which is epithalon minus the terminal glycine residue, investigated in connection with cartilage and connective tissue. Labs that buy cartalax should register that similarity, because mislabelling one as the other appears in mass spectrometry as a single-residue mass difference. A real certificate of analysis catches it. A stock PDF does not.

Thymalin is the outlier. It isn't a defined peptide at all. It's a polypeptide fraction extracted from calf thymus, which makes it a mixture rather than a sequence. Anyone looking to buy thymalin research peptide material has to accept that 'purity' cannot mean what it means for a tetrapeptide; the meaningful specification is fraction consistency and contaminant testing, not one clean HPLC peak.

Thymulin is a separate nonapeptide thymic hormone whose reported activity is zinc-dependent. Enquiries to buy thymulin land alongside enquiries to buy epithalon and get confused with thymalin constantly. They are not substitutes, and we correct that mix-up more often than any other in this category.

How to read a certificate of analysis before you spend a cent

A certificate of analysis is worth something only when it is lot-specific and reports both HPLC purity and mass spectrometry confirmation of molecular weight. A generic PDF with no lot number is marketing collateral wearing a lab coat.

Here's the detail almost every sourcing guide skips, and it's the one that quietly changes your working concentrations: HPLC purity and net peptide content are different numbers. A vial can be 99% pure by HPLC and still be only 70–80% peptide by mass, because lyophilised peptides carry residual water and counterions, typically trifluoroacetate salt left behind by purification. Purity tells you how much of the peptide present is the correct peptide. Net peptide content tells you how much peptide is present at all. Every lab that decides to buy epithalon should ask for both figures, not one.

Then check the mass. Epithalon's monoisotopic mass sits at roughly 390 Da as the free acid. A mass spec trace landing somewhere else means you have a different molecule, whatever the label reads.

The other question worth asking: was this synthesised in a small batch with confirmed amino-acid sequencing, or drop-shipped from a bulk lot nobody at the company has ever physically seen? That's the practical divide between a synthesis-led supplier and a reseller, and it's why we publish lot-specific documentation across the Real Peptides research catalog.

In our experience, buyers who compare certificates before they compare prices tend to land on the right supplier first time. Buyers who compare price first tend to buy epithalon twice.

What to check before you buy epithalon or any bioregulator

Three things decide whether what arrives still meets spec: cold chain, documentation on receipt, and the legal frame it ships under.

Lyophilised bioregulators are stable as dry powder and tolerate short ambient excursions in transit, which is precisely why they ship that way rather than in solution. For longer holding, standard laboratory guidance for lyophilised peptides is −20°C or colder, protected from light and moisture. Once reconstituted, the tolerance narrows sharply: solutions go to 2–8°C and should be aliquoted so a single vial isn't put through repeated freeze–thaw cycles, each of which chips away at peptide integrity.

Regulatory status is the part buyers skip. Epithalon, thymalin, thymulin and cartalax are not FDA-approved drugs. They are research-use-only materials, supplied for laboratory investigation and never for human or veterinary consumption, and no legitimate supplier will tell you differently. Search variants such as 'buy epithalon anti-aging peptide australia' appear constantly, and the honest answer is that supplier stock is rarely the constraint. Import and customs rules are, and they differ by jurisdiction. Anyone about to buy epithalon should confirm their own local import position before ordering, not after the parcel is in transit.

Where a study design involves animal models, researchers should talk to their veterinarian and clear the protocol through their institutional review process first. The information here is educational: it describes what the research literature reports and how laboratories handle these materials, not guidance directed at any person.

Bioregulator sourcing comparison: four compounds side by side

The sourcing question is genuinely different for each compound because the chemistry is different. This is what to verify and what to expect when you set out to buy epithalon, cartalax, thymalin or thymulin.

Compound	Structure and class	What the research literature examines	What to verify on the COA	Professional Assessment
Epithalon / Epitalon (AEDG)	Synthetic tetrapeptide, Ala-Glu-Asp-Gly, C14H22N4O9	Pineal and circadian signalling; telomerase activity in cultured somatic cells	HPLC purity, net peptide content, mass confirmation near 390 Da, lot number	The most widely stocked of the four and the easiest to verify; if a supplier can't produce a clean COA for this compound, walk away from the whole catalog
Cartalax (AED)	Synthetic tripeptide, Ala-Glu-Asp	Cartilage and connective tissue research	Mass spec confirming the tripeptide, not the AEDG tetrapeptide; synthesis date	Sequence proximity to epithalon makes mislabelling the live risk here, so mass spec matters more than purity percentage
Thymalin	Polypeptide fraction extracted from calf thymus; a mixture, not a sequence	Thymic and immune function in the Russian-language literature	Fraction consistency, contaminant and endotoxin testing, source material documentation	Hardest of the four to specify meaningfully; a single HPLC purity figure on a thymalin COA is a red flag, not reassurance
Thymulin	Nonapeptide thymic hormone; reported activity is zinc-dependent	Thymic hormone signalling and immune modulation	Sequence confirmation, purity, and whether the material is supplied as the zinc-coupled or uncoupled form	Genuinely scarce as a research compound, and routinely substituted with thymalin by careless suppliers; confirm the sequence in writing before ordering

What If: bioregulator sourcing scenarios

What if the vial looks empty when it arrives?

Weigh nothing, panic about nothing, and check the label quantity against the certificate of analysis before contacting the supplier. Lyophilised peptide at small milligram quantities frequently presents as a thin translucent film on the vial wall or an almost invisible residue at the base rather than a visible white pellet, particularly after shipping vibration redistributes it. The absence of a visible plug is not evidence of a short fill.

What if my lyophilised epithalon sat in a hot warehouse for three days?

Document the excursion, note it against the lot, and treat the material as compromised for any experiment where potency is an endpoint. Dry lyophilised powder is considerably more tolerant of ambient temperature than solution, which is why it ships that way, but sustained heat still promotes degradation and there is no home test that distinguishes an intact tetrapeptide from a partially degraded one by appearance. Suppliers who care about this will re-ship rather than argue.

What if the certificate of analysis doesn't match my lot number?

Stop and request the correct document before opening anything, because a mismatched COA is functionally no COA. This is the most common documentation failure we see reported, and it usually means the supplier is issuing one generic certificate across every batch they ever sold. If you buy epithalon or cartalax from a source that can't produce lot-matched paperwork on request, you have no traceable evidence of identity or purity for your records.

What if I can't find thymulin from any supplier I'd trust?

Ask directly whether the listing is thymulin or thymalin and request the sequence in writing rather than assuming the product page is accurate. Thymulin is genuinely uncommon as a research compound, and scarcity is exactly the condition under which substitution happens. Researchers who buy epithalon routinely and then move into thymic material for the first time are the group most often caught by this. Written sequence confirmation costs the supplier nothing and settles it.

The unglamorous truth about buying bioregulators

Here's the honest answer: the evidence base for these four compounds is thinner than the marketing around them, and anyone telling you otherwise is selling. Most of the primary literature originates from a single research programme, much of it isn't widely replicated in English-language journals, and outcome claims aimed at consumers are not supported by that record. That doesn't make the compounds uninteresting to researchers. It does mean the only defensible reason to buy epithalon, thymalin, thymulin or cartalax is laboratory investigation under proper documentation, with the research peptide range treated as lab inputs rather than answers.

The decision to buy epithalon is really a decision about how much you trust a piece of paper, and that's a better frame than it sounds. Chemistry you can't see is chemistry you have to verify on someone else's word, so the honest measure of a supplier isn't the compound list or the price per milligram. It's whether they'll send you the lot-matched analytical data before you order, unprompted, and whether the mass on that trace is the mass it should be. Everything else in this market is packaging.

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. Epitalon, also spelled epithalon, is available from research peptide suppliers as a research-use-only lyophilised powder. It is not an FDA-approved drug and is not supplied for human or veterinary consumption. Legitimate sources provide a lot-specific certificate of analysis showing HPLC purity and mass spectrometry confirmation of the AEDG tetrapeptide.

Buy from suppliers that publish lot-specific analytical documentation rather than general marketplaces or resellers. The practical filter is simple: request the certificate of analysis for the exact lot before ordering. If it arrives with a matching lot number, HPLC purity and a mass trace near 390 Da, the source is credible.

In most jurisdictions research peptides can be supplied for laboratory investigation, but import rules vary considerably and some countries restrict peptide shipments at customs. Epithalon is not approved as a medicine anywhere, so it cannot be sold or marketed for human use. Check your own national import position before you buy epithalon.

Pricing varies widely by supplier, quantity and whether the compound is a simple synthetic peptide or an extracted fraction. Synthetic short peptides such as epithalon and cartalax are generally the least expensive of the group, while thymulin is typically the costliest because of scarcity. Compare cost per verified milligram, not per vial.

The best place to buy cartalax is a supplier that provides mass spectrometry data confirming the Ala-Glu-Asp tripeptide specifically. Because cartalax differs from epithalon by only a terminal glycine residue, mislabelling is the main sourcing risk. Purity percentage alone won't reveal it; a mass trace will.

Thymalin is stocked by a smaller number of research suppliers than the synthetic peptides because it is an extracted calf thymus polypeptide fraction rather than a synthesised sequence. When you buy thymalin, ask for source material documentation and contaminant testing rather than a single HPLC purity figure, which is not a meaningful specification for a mixture.

Thymalin is a polypeptide fraction extracted from calf thymus, so it is a mixture of peptides with no single defined sequence. Thymulin is a specific nonapeptide thymic hormone whose reported activity is zinc-dependent. They are different materials with different specifications and are not interchangeable, despite frequent substitution.

Yes, identical. Both spellings refer to AEDG, the synthetic tetrapeptide Ala-Glu-Asp-Gly, and the variation comes from transliterating the original Russian name. Supplier listings use both spellings interchangeably, so buyers comparing an 'epitalon' product against an 'epithalon' product are comparing the same compound.

Standard laboratory practice for lyophilised peptides is storage at −20°C or colder, protected from light and moisture, in the original sealed vial. Once reconstituted, solutions are held at 2–8°C and aliquoted into single-use portions so the material isn't subjected to repeated freeze–thaw cycles that degrade peptide integrity.

Without lot-matched analytical data you have no evidence of identity, purity or peptide content, which makes any result generated from that material untraceable. The specific risks are wrong sequence, undeclared salt content inflating apparent mass, and contaminants. A generic certificate with no lot number provides none of this assurance.

No. Lyophilised epithalon is shipped as a dry powder precisely because it tolerates short ambient excursions in transit far better than a solution would. Cold shipping becomes relevant for pre-reconstituted material, which reputable research suppliers generally avoid selling for exactly this stability reason.

RESEARCH USE ONLY · NOT EVALUATED BY THE FDA