Comparison
Epitalon vs GHK-Cu
Epitalon and GHK-Cu are both studied in longevity science but target different mechanisms: Epitalon is a tetrapeptide that activates telomerase, while GHK-Cu is a copper tripeptide that modulates over 4,000 genes and drives dermal collagen synthesis.
Epitalon and GHK-Cu are both prominent in longevity research, but they target two different layers of the aging process: Epitalon acts on telomere biology while GHK-Cu acts on broad gene regulation and dermal renewal. Epitalon (Ala-Glu-Asp-Gly) is a synthetic tetrapeptide with a molecular weight of 390.3 Da and a half-life of approximately 45 minutes. GHK-Cu (glycyl-L-histidyl-L-lysine copper complex) is a tripeptide with a molecular weight of 340.4 Da and a short aqueous half-life of around 0.5 hours.
How do Epitalon and GHK-Cu differ?
Research shows Epitalon's primary mechanism is telomerase activation: Khavinson et al. demonstrated telomerase induction and telomere elongation in human fetal fibroblasts and lymphocytes via a p53-independent pathway (PMID: 12665553). GHK-Cu's primary mechanism is pleiotropic gene regulation: Pickart & Margolina (2018) documented modulation of 4,082 human genes, including collagen I/III/VI upregulation, SOD1 antioxidant induction, and suppression of senescence and inflammatory markers (PMID: 29987172).
Where does each fit in longevity research?
Epitalon is studied chiefly in telomere biology, circadian/melatonin regulation, and rodent lifespan models. GHK-Cu is studied chiefly in skin aging, wound healing, and systemic gene-resetting contexts. Because their mechanisms do not overlap, they are commonly studied as complementary tools rather than alternatives — one addressing replicative senescence at the chromosome level, the other addressing tissue-level repair and gene expression.
| Metric | Epitalon | GHK-Cu |
|---|---|---|
| Class | Synthetic tetrapeptide (pineal-derived) | Copper-binding tripeptide |
| Sequence | Ala-Glu-Asp-Gly | Gly-His-Lys · Cu²⁺ |
| Molecular weight | 390.3 Da | 340.4 Da |
| Half-life | ~45 minutes | ~0.5 hours (aqueous) |
| Primary mechanism | Telomerase activation (p53-independent) | 4,082-gene regulation; collagen synthesis |
| Research focus | Telomere biology, lifespan, melatonin | Skin aging, wound healing, antioxidant gene induction |
| Goal alignment | Longevity | Skin / longevity |
| Key reference | PMID: 12665553 | PMID: 29987172 |
See the Epitalon monograph and the GHK-Cu monograph for full citation summaries.
Research Use Only · Not for human consumption · Not for veterinary use.