Epitalon vs Epithalon: the two names describe the same synthetic tetrapeptide. Learn why both spellings exist, how the peptide is studied, and what to check.
Epitalon and Epithalon are the same synthetic tetrapeptide — the difference is spelling, not chemistry. Epitalon is the form used in most English-language research papers and on Western product labels, while Epithalon tracks the Russian original more closely. Both names describe the four-amino-acid sequence AEDG (Ala-Glu-Asp-Gly), so the molecule itself does not change when a supplier chooses one spelling over the other.
Why Two Spellings Exist
The peptide was developed in the 1980s by Vladimir Khavinson and colleagues at the St. Petersburg Institute of Bioregulation and Gerontology. Russian-language publications wrote the name as “Эпиталон,” which transliterates into English as Epithalon.
As the research spread into English databases, journals, and vendor catalogs, the shorter “Epitalon” spelling became the default. Neither version is a brand name, a salt form, or a different grade of the peptide.
Search data splits the two terms almost evenly, which is why a vendor may list the same vial under both names. If you see a listing that treats them as separate products with different prices, that is a marketing choice rather than a chemical one.
Epitalon and Epithalon share the same CAS number (307297-39-8), the same molecular formula, and the same molecular weight, so laboratory analysis cannot tell them apart.
Epitalon vs Epithalon at a Glance
| Attribute | Epitalon | Epithalon |
|---|---|---|
| Origin of the name | English-language shortening | Transliteration of the Russian original |
| Peptide sequence | Ala-Glu-Asp-Gly (AEDG) | Ala-Glu-Asp-Gly (AEDG) |
| CAS number | 307297-39-8 | 307297-39-8 |
| Molecular weight | ~390.4 g/mol | ~390.4 g/mol |
| Typical research vial | 5 mg or 10 mg lyophilized powder | 5 mg or 10 mg lyophilized powder |
| FDA approval for human use | None | None |
Every row in that table matches. The only meaningful variable between two products is purity and how the supplier handles testing and storage — not the spelling printed on the label.
What Epitalon Is Studied For
Epitalon research is concentrated in a few areas, and nearly all of it is preclinical:
- Pineal function and melatonin rhythm. Older studies from Russian groups reported shifts in nightly melatonin output in aged animals.
- Telomerase activity. Cell-culture work has examined whether AEDG influences telomerase expression, which is frequently summarized online as a “longevity peptide.”
- Antioxidant and neuroprotective markers. Rodent studies have looked at oxidative stress markers in brain tissue.
It is worth being precise here: telomerase activation in a petri dish is not evidence of a longer lifespan in humans. No large randomized controlled trial has established clinical benefits for Epitalon in people.
Sleep and circadian topics overlap with other compounds, so readers often end up comparing epithalon vs dsip. DSIP, or delta sleep-inducing peptide, is studied for sleep architecture, while Epitalon is studied for pineal regulation and melatonin timing, which is a different mechanism entirely.
Handling, Reconstitution, and Purity
Lyophilized Epitalon powder is normally stored frozen and protected from light. Once it is reconstituted, stability depends heavily on which liquid is used.
A frequent beginner question is reconstitution solution vs bacteriostatic water for peptides. Bacteriostatic water contains benzyl alcohol, which slows bacterial growth and extends the usable life of a multi-dose vial, while plain sterile or reconstitution water carries no preservative and is intended for single use.
For any research peptide, the label details that matter most are:
- A third-party certificate of analysis (COA) with an HPLC purity figure, usually 98% or higher
- Mass spectrometry confirmation of the correct molecular weight
- Lot numbers that match the COA on file
Similar Names, Different Molecules
Not every comparison in this space is a spelling issue. Some are genuine chemical differences, and mixing them up matters.
- N-acetyl Epitalon. Adding an acetyl group changes the molecule’s stability and half-life, so n-acetyl epitalon amidate vs epitalon is a real comparison of two different compounds rather than two names for one.
- DSIP. A different peptide with a different sequence, researched for sleep rather than telomerase.
- PT-141 (bremelanotide). Route questions such as pt-141 nasal spray vs injection are about how a drug enters the body, and that drug is unrelated to Epitalon.
- Vyleesi and Addyi. Vyleesi vs addyi compares two FDA-approved medications for low sexual desire, a reminder that some peptide-adjacent comparisons involve regulated drugs while others involve unapproved research chemicals.
Safety, Legal Status, and Medical Guidance
Epitalon is not approved by the FDA for human use in the United States, and vials sold online are labeled for research purposes only. It is not a dietary supplement, and it cannot legally be marketed as a treatment for aging, sleep problems, or any disease.
Human safety data is thin. Long-term effects are unknown, and because telomerase activation is a theoretical cancer concern, that question deserves more than a forum answer.
Anyone weighing Epitalon should talk with a licensed healthcare professional instead of relying on vendor claims or self-reported protocols. The fact that “epitalon” and “epithalon” are interchangeable does not make the compound itself low-risk or well-studied.
Frequently Asked Questions
Is Epitalon the same as Epithalon?
Yes. Epitalon and Epithalon are two spellings of one synthetic tetrapeptide, AEDG (Ala-Glu-Asp-Gly). Both share CAS number 307297-39-8 and a molecular weight of roughly 390.4 g/mol. Any difference in price or product description comes from the vendor, not from the molecule.
What is the difference between Epitalon and N-acetyl Epitalon?
N-acetyl Epitalon is a chemically modified version of Epitalon with an acetyl group added to the N-terminus, and the amidate form adds a C-terminal amide as well. These changes can affect stability and half-life, so the two are distinct compounds. This is a real chemical difference, unlike the Epitalon versus Epithalon spelling question.
Is Epitalon FDA-approved for human use?
No. Epitalon is not FDA-approved for human use in the United States and is sold as a research chemical, not a dietary supplement or medication. Human safety and dosing data remain limited, so anyone considering it should consult a licensed healthcare professional.
This page provides educational research information and does not replace medical advice, diagnosis, or treatment.