NAD+ vs Epithalon
NAD+ and Epithalon are both central to longevity research but target different biological mechanisms and levels of cellular aging. NAD+ is a foundational coenzyme whose intracellular decline with age is documented across species and is directly linked to sirtuin-mediated epigenetic dysregulation, impaired DNA repair, and mitochondrial dysfunction. Epithalon is a synthetic tetrapeptide that targets the telomere biology axis, activating telomerase to maintain telomere length and extend replicative capacity in somatic cell models. Researchers building comprehensive aging panels frequently include both to address the DNA repair and epigenetic layer (NAD+) alongside the telomere maintenance layer (Epithalon).
NAD+
Dinucleotide coenzyme (oxidized nicotinamide form)
Epithalon
Tetrapeptide (Ala-Glu-Asp-Gly)
At a Glance
Key research profiles for each compound.
NAD+
Coenzyme studied for sirtuin activation, DNA repair, and mitochondrial aging biology
Class
Dinucleotide coenzyme (oxidized nicotinamide form)
Mechanism
Sirtuin substrate, PARP activation, redox cycling, mitochondrial biogenesis
Half-Life
Short intracellular half-life, supplemented to replenish precursor pools
Research Area
DNA repair, epigenetic aging, mitochondrial biology, cellular senescence
- Investigated for SIRT1 and SIRT3 activation and epigenetic deacetylation in aging models
- Studied for PARP-dependent DNA double-strand break repair in genotoxic stress models
- Documented role in mitochondrial biogenesis via PGC-1alpha and TFAM pathways
- Examined for NAD+/NADH ratio effects on cellular senescence and metabolic aging
Epithalon
Synthetic tetrapeptide studied for telomerase activation and replicative lifespan
Class
Tetrapeptide (Ala-Glu-Asp-Gly)
Mechanism
Telomerase (hTERT) activation, cell cycle modulation, melatonin regulation
Half-Life
Rapidly cleared in preclinical models
Research Area
Telomere biology, cellular longevity, circadian aging
- Studied for hTERT telomerase activation and telomere elongation in somatic cells
- Investigated for effects on cell cycle progression and replicative senescence in vitro
- Examined for melatonin pathway modulation and circadian regulation in aging models
- Documented effects on immune cell aging and NK cell activity in animal studies
Side-by-Side Comparison
Key research parameters compared directly.
| Feature | NAD+ | Epithalon |
|---|---|---|
| Compound Class | Dinucleotide coenzyme | Synthetic tetrapeptide (4 AA) |
| Primary Mechanism | Sirtuin activation, PARP substrate, redox cycling | Telomerase (hTERT) activation, cell cycle modulation |
| Aging Target | NAD+ decline, mitochondrial dysfunction, epigenetic drift | Telomere shortening, replicative senescence |
| Research Level | Coenzyme substrate, foundational biochemistry | Peptide signal, gene expression and telomere maintenance |
| DNA Relevance | PARP-mediated DNA strand break repair | Telomere elongation to prevent chromosome end degradation |
| Mitochondrial Axis | Central, via PGC-1alpha and SIRT3 pathways | Indirect, via cellular energy and senescence modulation |
| Cell Type Focus | Broadly expressed across all cell types | Somatic cells, immune cells, endocrine cells |
| Research Maturity | Decades of foundational research, strong literature | Developed 1980s to 1990s, primarily Khavinson group data |
Research Deep-Dive
NAD+
NAD+ is one of the most research-validated targets in the aging biology field. Intracellular NAD+ levels decline by approximately 50 percent between young adulthood and middle age across multiple mammalian species, a decline that correlates with impairment of sirtuin activity (SIRT1 through SIRT7), reduced PARP-mediated DNA repair capacity, and mitochondrial dysfunction. Research supplementing NAD+ precursors (NMN, NR) in animal models has demonstrated improvements in muscle function, metabolic health, and cognitive performance in aged animals, with mechanistic data pointing to sirtuin reactivation and mitochondrial biogenesis via PGC-1alpha as primary effectors.
View NAD+ →Epithalon
Epithalon (Ala-Glu-Asp-Gly) was developed by the Khavinson group as a synthetic tetrapeptide analog of Epithalamin, a polypeptide derived from bovine pineal gland. Its primary documented mechanism is the activation of telomerase, specifically the hTERT catalytic subunit, in somatic cells that normally exhibit low telomerase activity. Cell culture studies have reported telomere elongation and extension of cellular replicative lifespan in Epithalon-treated fibroblast and immune cell models. Animal studies have examined Epithalon's effects on melatonin production, immune function, and markers of biological aging across multiple tissue types. The compound's ability to extend cell division capacity beyond standard limits in vitro has made it a frequent subject in cellular longevity and anti-senescence research.
View Epithalon →Research Context
In comprehensive longevity research protocols, NAD+ and Epithalon address complementary dimensions of cellular aging. NAD+ targets the metabolic and epigenetic aspects of aging, including sirtuin-regulated gene expression and PARP-dependent DNA repair. Epithalon targets the structural dimension, specifically the preservation of telomere integrity that enables continued cell division. Together they cover two of the hallmarks of aging (epigenetic alterations and telomere attrition) in a mechanistically distinct and non-redundant way.
Frequently Asked Questions
Research Use Cases
Research Stacks
Source Both Compounds
NAD+ and Epithalon are both available from Spartan Peptides at ≥98% HPLC-verified purity. Domestic US supply, same-day dispatch before 2 PM. All products for in-vitro research use only.
All compounds are strictly for in-vitro research use only and not intended for human consumption.