Why there are two spellings
Epithalon and epitalon are two ways of writing one four-amino-acid peptide. The sequence is Ala-Glu-Asp-Gly, which is alanine, glutamic acid, aspartic acid and glycine, and it was first described by researchers at the St. Petersburg Institute of Bioregulation and Gerontology. Several of the published studies listed on our epithalon page spell it epitalon in their titles, and our own page and this one use epithalon, so you'll see both depending on where you land. Neither spelling is a different grade or a different version of the peptide.
Of the 39 vendors we track for it, 15 use the epitalon spelling in the listing. Either way, you're looking at the same peptide. A listing that says epitalon isn't a different formulation.
How to tell what you're looking at
| Name you see | What it is |
|---|---|
| Epithalon | The synthetic four-amino-acid peptide |
| Epitalon | Same peptide, alternate spelling |
| Epithalamin | The cattle pineal gland extract it was made from |
The one to watch is epithalamin, because it ends in an m and looks like a typo. It's the natural extract, a different product, and we have no dose figures for it. The epithalon amounts on our dosage page don't apply to it. For a vial labeled epithalon or epitalon, the milligrams on the label and a batch lab report tell you more than the spelling does.
When you're comparing vendors, search both spellings. A listing under one name can sit apart from a listing under the other even though the vial holds the same peptide, so a single search can miss listings that use the other spelling. Vial size is the same story under either name: 10 mg and 20 mg are the common sizes, and some vendors also sell 5 mg.
What it changes for your dosage
Nothing. A search for epitalon dosage and a search for epithalon dosage lead to the same numbers, and they're on our epithalon dosage page: 5 to 10 mg once a day for a 10-day course, repeated 2 to 3 times a year. They come from peptide education pages and vendor sites, and no dose-finding study sets them.
If you're weighing it against another peptide, there are side-by-sides for epitalon vs GHK-Cu and DSIP vs epithalon. The epithalon page has the background and live prices from vendors, so you can compare the real price per milligram under either spelling.
It's sold for research, and the big human trials haven't been run yet. You knew that, it's why you're reading this and not the label.
Questions people ask
Is epitalon dosage the same as epithalon dosage?
Yes. It's one peptide, so the dosage is the same under either spelling: 5 to 10 mg once a day for a 10-day course, repeated 2 to 3 times a year. Those figures come from peptide education pages and vendor sites.
Which spelling is correct, epitalon or epithalon?
Both are in use and both point to the same peptide. We write epithalon and mention epitalon alongside it so either search lands on the right page.
Is epithalamin the same as epithalon?
No. Epithalamin is a polypeptide extract of the pineal gland of cattle, and epithalon is the four-amino-acid synthetic version made to copy its active region.
Is the epitalon I see at one vendor different from epithalon at another?
The spelling alone doesn't tell you. Check the vial size in milligrams and look for a certificate of analysis, the lab report for the batch.
What is the amino acid sequence of epithalon?
Alanine, glutamic acid, aspartic acid and glycine, written Ala-Glu-Asp-Gly or AEDG. It doesn't occur in this exact four-amino-acid form in nature.