NAD+ vs SS-31.
Quick Verdict
NAD+ is a longevity primarily researched for cellular energy, dna repair, longevity, while SS-31 is a mitochondrial peptide studied for energy, recovery, neuroprotection.
Side-by-Side Analysis
| Dimension | NAD+ | SS-31 |
|---|---|---|
| Category | Longevity | Mitochondrial Peptide |
| Mechanism | NAD+ is a critical coenzyme in every cell, essential for mitochondrial energy production (oxidative phosphorylation), DNA repair via PARP and sirtuin activation, and circadian rhythm regulation. | Mitochondrial protection. |
| Half-Life | ~4 hours | ~4 hours |
| Route | SubQ | SubQ |
| Typical Dose | 50000–200000 mcg | 4000–4000 mcg |
| Frequency | Daily | 7x/wk |
| Evidence Level | Strong | Moderate |
| Indexed Studies | 20+ indexed | 20+ indexed |
| FDA Status | Research Only | Research Only |
| Lowest Price | — | $75.00 / 10mg via Ascension Peptides |
Mechanism of Action Comparison
How NAD+ Works
NAD+ NAD+ is a coenzyme essential for cellular energy and DNA repair that declines sharply with age, studied for restoring mitochondrial function and supporting longevity pathways.
NAD+ is a critical coenzyme in every cell, essential for mitochondrial energy production (oxidative phosphorylation), DNA repair via PARP and sirtuin activation, and circadian rhythm regulation. Levels decline ~50% between ages 40-60, contributing to metabolic dysfunction and aging.
How SS-31 Works
SS-31 SS-31 (Elamipretide) is a mitochondria-targeting peptide studied for protecting heart and muscle cells from energy failure, currently in FDA Fast Track development for heart failure.
Mitochondrial protection. Selectively concentrates in the inner mitochondrial membrane where it stabilizes cardiolipin for efficient electron transport chain function.
Key Mechanistic Difference
NAD+ operates as a longevity, while SS-31 functions as a mitochondrial peptide — these are fundamentally different pharmacological approaches.
Research Evidence
NAD+
20 studies- NAD+ decline is a driver of agingRajman et al. (Cell Metabolism): Comprehensive review demonstrating NAD+ decline as a hallmark of aging, with restoratio…Strong
- NAD+ repletion improves mitochondrial and stem cell functionZhang et al. (Science): NAD+ supplementation restores mitochondrial function in aged mice, improving muscle stem cell fu…Preclinical
- CD38 dictates age-related NAD decline and mitochondrial dysfunctionCamacho-Pereira et al. (Cell Metabolism): Identifies CD38 as the primary NAD-consuming enzyme that increases with age, e…Preclinical
SS-31
20 studies- SS-31 (Elamipretide) clinical trials overviewSzeto (Br. J. Pharmacol.): Comprehensive review of elamipretide mechanism and clinical trial results in heart failure, m…Moderate
- Elamipretide stabilizes cardiolipin and cristae structureBirk et al. (Pharmaceuticals): Detailed mechanism review showing elamipretide binds cardiolipin, stabilizes mitochondria…Preclinical
- Elamipretide attenuates age-related cardiac protein modificationsStudy demonstrating elamipretide can reverse age-associated post-translational heart protein modifications, restoring mi…Preclinical
Vendor Pricing
· Affiliate links · Prices verified 2026SS-31
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Frequently Asked Questions
Can I take NAD+ and SS-31 together?▼
Yes — NAD+ and SS-31 are identified as synergistic in interaction databases. They operate through complementary mechanisms and are commonly combined in research protocols.
Which has more research evidence — NAD+ or SS-31?▼
NAD+ has 20 indexed studies (highest evidence: Strong). SS-31 has 20 indexed studies (highest evidence: Moderate). Both have comparable research coverage.
Which is better for longevity — NAD+ or SS-31?▼
Both are researched for longevity. NAD+ addresses this via cellular energy, dna repair, longevity. SS-31 approaches it through energy, recovery, neuroprotection. The optimal choice depends on your specific research protocol and which mechanism aligns with your objectives.
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Research Use Only — Not Medical Advice
This comparison is provided for educational and research purposes only. It does not constitute medical, prescribing, or treatment advice. Clinical data cited here is sourced from published peer-reviewed trials and FDA labels. Consult a qualified healthcare professional before making any decisions about medications or research compounds. PeptiDex is an informational resource and does not sell pharmaceutical products.