Source comparison
Epithalon vs Epitalon: Same Peptide, Different Spelling
The supposed difference between Epithalon and Epitalon has confused researchers for decades. But the answer is simpler than most sources suggest. They're identical. Both names refer to the same four-amino-acid sequence (Ala-Glu-Asp-Gly), synthesised in laborat
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- The supposed difference between Epithalon and Epitalon has confused researchers for decades. But the answer is simpler than most sources suggest. They're identical. Both names refer to the same four-amino-acid sequence (Ala-Glu-Asp-Gly), synthesised in laboratories worldwide under both spellings. The variation isn't scientific. It's linguistic. Russian researchers who first synthesised this peptide in the 1980s used Cyrillic script, and when transliterated into English, the same word became Epithalon in some publications and Epitalon in others.
- We've worked with peptide researchers across labs using both terms interchangeably, and the molecular structure submitted for synthesis is always identical. The confusion isn't about chemistry. It's about documentation standards that evolved before international naming conventions were standardised.
- What's the difference between Epithalon and Epitalon?
- There is no chemical difference between Epithalon and Epitalon. They are the same tetrapeptide with the amino acid sequence alanine-glutamic acid-aspartic acid-glycine (Ala-Glu-Asp-Gly). The variation in spelling stems from transliteration differences when converting the original Russian name (Эпиталон) into English. Both terms are used in peer-reviewed research, synthesis protocols, and supplier catalogues to describe the synthetic version of the naturally occurring pineal peptide epithalamine.
- Most researchers encounter this discrepancy when sourcing peptides or reviewing literature. One study uses Epithalon, the next uses Epitalon, and without context, it appears they're discussing separate compounds. They aren't. The molecular weight (390.35 g/mol), structure, and mechanism of action remain constant regardless of spelling. What matters is understanding where each term originated, why both persist, and what that means for researchers navigating supplier catalogues, regulatory documentation, and published studies.