Evidence, not personal-use guidance
This page explains research terminology and documentation. It does not provide medical advice, dosing, injection, administration or a recommendation to obtain or use any substance.
What is Epitalon / Epithalon?
Epitalon, also written epithalon, is a synthetic tetrapeptide discussed in ageing, circadian and cell-biology research.
Search results often combine research papers, supplier descriptions and personal claims. Those sources answer different questions. A paper can describe a mechanism or study outcome; only a batch-specific analytical record can describe the tested sample.
Identity and naming
Spelling variants can refer to the same proposed tetrapeptide, but the sequence, stereochemistry, terminal form and salt must still be explicit. A four-residue name is not a complete analytical specification.
Useful records state the exact material, expected molecular characteristics, batch code, sample identifier and form. See peptide sequence and molecular weight for why a familiar name is not enough.
What the research base shows
The literature includes cell, animal and limited human-context reports, often from a narrow research tradition. Claims about lifespan or rejuvenation go far beyond what a careful reading of model-specific studies can establish.
Evidence should be sorted by level: biochemical or cell studies, animal models, observational human data, controlled trials and regulatory evidence. A result at one level should not be silently rewritten as a conclusion at another.
Analytical and COA questions
A short peptide can share nominal mass with structural variants. Use appropriate separation and reference comparison, not only a single mass figure or a headline purity percentage.
- Does the report name this exact molecular form?
- Does the sample or batch code match the container?
- Are identity, peak-area purity and quantitative content reported separately?
- Can the laboratory and report number be independently traced?
Use the field-by-field COA guide before relying on a headline percentage.
What this page cannot establish
It cannot establish that any commercial material is genuine, sterile, safe, legally supplied or suitable for a particular purpose. Regulatory status and authorised uses can change and vary by country; consult the MHRA Products registry and other relevant official sources.
Frequently asked questions
Why are there two spellings?
Epitalon and epithalon are transliteration variants commonly used for the same proposed tetrapeptide.
Do ageing-model studies prove life extension in people?
No. Findings in cells or animals cannot be assumed to establish human lifespan effects.
Research sources
- PubMed literature search: Epitalon / Epithalon.
- ClinicalTrials.gov search: Epitalon / Epithalon.
- IUPAC peptide terminology.
- ICH Q2(R2): analytical procedure validation.
Search links are provided because the literature and regulatory status can change. Sources were checked on 19 September 2026.