Synthetic tetrapeptide
Epitalon (Epithalon)
Also spelled Epithalon; naming, salt form, identity, and evidence should be checked before comparing reports or claims.
Why it is discussed
Longevity, sleep, and age-related claims
Epitalon is discussed in longevity communities for sleep, circadian, telomere, and lifespan claims. These claims rely on limited and difficult-to-generalize evidence and do not establish an approved indication, reliable dosing, or long-term human safety.
What it is
A synthetic four-amino-acid peptide studied in cell-aging research.
Epitalon, also spelled Epithalon, is a tetrapeptide made from alanine, glutamate, aspartate, and glycine. It is discussed in relation to aging biology, particularly telomeres and telomerase. These terms describe cellular structures and an enzyme—not a demonstrated rejuvenation treatment.
How it works
A cellular observation, not a proven longevity mechanism.
Telomeres are repetitive DNA regions at chromosome ends. Telomerase is an enzyme that can help maintain them. In a study of cultured human fetal fibroblasts, investigators reported telomerase activation and telomere elongation after exposure to Epitalon.
This shows what was measured in that cell system. It does not establish how the peptide would reach relevant cells throughout a person, whether a similar response would occur, or whether it would improve health.
Longer telomeres are not automatically a favorable clinical outcome, and manipulating cell maintenance is not equivalent to slowing human aging. The cited experiment does not demonstrate longer human lifespan, broad anti-aging benefits, or safe long-term use.
Scientific / evidence sources
Evidence at a glance
What is established—and what is not.
Limited, difficult-to-generalize evidence
Limited research has generated hypotheses involving circadian biology, cellular aging, and related endpoints.
Reliable clinical benefit, product equivalence, dose selection, and long-term human safety are not established.
Regulatory status
Canada and the United States are checked separately.
Health Canada lists injectable Epitalon among unauthorized peptide drugs and warns that these products have not been assessed for safety, efficacy, or quality.
No FDA-approved product identified in the current authorization-database review. FDA lists Epitalon among withdrawn bulk-drug-substance nominations and says it lacks sufficient safety information to know whether compounded use would harm humans.
Regulatory status describes product authorization and relevant regulatory context. It is not a complete legal opinion about possession, importation, prescribing, sale, or professional practice.
If you are reviewing a product report
The molecule profile and the testing report answer different questions.
This page summarizes evidence and regulatory context. A laboratory report may address identity, purity, or quantity for one submitted sample; it does not transfer clinical evidence or product authorization.