Comparison Guide
Epithalon vs MOTS-c Comparison
Epithalon and MOTS-c are the two most studied longevity peptides, targeting different hallmarks of aging. This guide compares their mechanisms, research evidence, and how they complement each other.
Bottom line: Epithalon (Ala-Glu-Asp-Gly, CAS 307297-39-8) is a synthetic tetrapeptide that activates telomerase to maintain telomere length — 35+ years of Khavinson research showed 13.3% mean lifespan increase in animal models. MOTS-c (CAS 1627580-64-6) is a 16-amino acid mitochondrial-derived peptide that activates AMPK, functioning as an "exercise mimetic" that improves metabolic efficiency. Epithalon targets telomere attrition; MOTS-c targets metabolic/mitochondrial decline. They address complementary hallmarks of aging and are commonly combined in longevity research.
Head-to-Head Comparison
| Property | Epithalon | MOTS-c |
|---|---|---|
| Full Name | Epitalon / Epithalone | Mitochondrial Open Reading Frame of the 12S rRNA-c |
| CAS Number | 307297-39-8 | 1627580-64-6 |
| Size | 4 amino acids (Ala-Glu-Asp-Gly) | 16 amino acids |
| Origin | Synthetic (Khavinson, 1990s) | Endogenous mitochondrial peptide (Lee, 2015) |
| Primary Target | Telomerase activation | AMPK activation |
| Aging Hallmark | Telomere attrition | Metabolic/mitochondrial dysfunction |
| Key Finding | 13.3% mean lifespan increase (animal) | Exercise-mimetic metabolic effects |
| Research History | 35+ years (since ~1990) | ~10 years (since 2015) |
| Administration | Subcutaneous injection, cycled | Subcutaneous injection, daily/weekly |
| Protocol | 10–20 day cycles with rest periods | Continuous or cycling protocols |
| Natural Decline | Pineal function declines with age | MOTS-c levels decline with age |
| Complementary | SS-31, NAD+, Humanin | Epithalon, SS-31, NAD+ |
Epithalon: The Telomerase Activator
Epithalon (Ala-Glu-Asp-Gly) is a synthetic tetrapeptide based on 35+ years of research by Professor Vladimir Khavinson at the St. Petersburg Institute of Bioregulation and Gerontology. It is the synthetic version of epithalamin, a pineal gland extract.
Mechanism of Action
Epithalon activates telomerase — the enzyme that extends telomere length on chromosome ends. Telomeres shorten with each cell division, acting as a biological clock. When telomeres become critically short, cells enter senescence or apoptosis. By reactivating telomerase, Epithalon extends replicative capacity and delays cellular aging. It also modulates melatonin production and circadian rhythm.
Key Research
- • 13.3% mean lifespan increase in animal models (Khavinson, Peptides 2003)
- • Telomerase activation confirmed in human somatic cells in vitro
- • Restoration of melatonin production in aging pineal glands
- • 15-year follow-up study showed reduced cardiovascular and cancer mortality
MOTS-c: The Exercise Mimetic
MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA-c) is a 16-amino acid peptide encoded in mitochondrial DNA, discovered in 2015 by Dr. Changhan David Lee at USC. It is one of the first identified "mitokines" — signaling peptides produced by mitochondria.
Mechanism of Action
MOTS-c activates AMPK (AMP-activated protein kinase) — the master metabolic sensor that responds to cellular energy status. This triggers metabolic pathways similar to endurance exercise: improved glucose uptake, enhanced fatty acid oxidation, increased insulin sensitivity, and mitochondrial biogenesis. MOTS-c levels naturally decline with age, correlating with metabolic dysfunction.
Key Research
- • Prevention of high-fat diet-induced obesity in animal models (Lee et al., Cell Metabolism 2015)
- • Improved insulin sensitivity and glucose regulation
- • Enhanced physical capacity in aged animal models
- • Protective against age-related skeletal muscle loss (sarcopenia)
🧬 The Complete Longevity Stack
Combining Epithalon and MOTS-c addresses two of the nine hallmarks of aging. Adding complementary peptides targets even more:
Telomere attrition — extends chromosome protective caps
Metabolic dysfunction — restores exercise-like metabolic efficiency
Mitochondrial dysfunction — stabilizes cardiolipin in inner membrane
Cellular energy decline — fuels sirtuins, PARPs, and 500+ enzymes
Cellular stress — cytoprotective signaling against apoptosis
