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SS-31 (Elamipretide): The Mitochondrial Peptide Research Guide
SS-31 (Elamipretide): The Mitochondrial Peptide Research Guide
SS-31 (elamipretide) is a synthetic tetrapeptide that targets cardiolipin on the inner mitochondrial membrane, protecting mitochondrial structure and bioenergetics. It has become one of the most clinically advanced mitochondrial peptides, with trials spanning cardiovascular, renal, ophthalmic, and neuromuscular conditions. This guide reviews its mechanism, evidence base, applications, dosing, and safety considerations.
1. What Is SS-31?
SS-31 (D-Arg-dimethylTyr-Lys-Phe-NH2) is a small aromatic-cationic peptide designed to selectively bind cardiolipin, a phospholipid unique to the inner mitochondrial membrane. By stabilizing cardiolipin, SS-31 preserves cristae architecture, electron transport chain function, and ATP production under stress. It is also known by the generic name elamipretide.
- Peptide type: Synthetic mitochondrial-targeting peptide
- Target: Cardiolipin on the inner mitochondrial membrane
- Administration: Subcutaneous injection in research settings
- Clinical stage: Advanced trials for cardiomyopathy, Barth syndrome, kidney disease, and age-related macular degeneration
- Status: Investigational drug; research compound
2. Mechanism of Action
SS-31 acts at the core of cellular energy production:
- Cardiolipin binding: Selectively interacts with cardiolipin to stabilize mitochondrial membrane structure
- Cristae protection: Preserves inner membrane folding essential for efficient oxidative phosphorylation
- ROS reduction: Limits reactive oxygen species production during electron transport
- Bioenergetic restoration: Maintains ATP synthesis capacity in stressed or aging tissues
3. The Research Landscape
| Research area | Reported findings |
|---|---|
| Cardiovascular | Improved cardiac function markers in heart failure and ischemia-reperfusion models |
| Barth syndrome | Phase 2 trials showed improved cardiac function in this mitochondrial disorder |
| Renal ischemia | Protected kidney function in acute kidney injury models |
| Age-related macular degeneration | Phase 2 trials demonstrated improved visual function in geographic atrophy |
SS-31 has one of the strongest clinical pipelines among research peptides, with multiple phase 2/3 programs completed or ongoing.
4. Research Applications
- Mitochondrial health research: Models of mitochondrial dysfunction and bioenergetic decline
- Cardiovascular research: Heart failure, ischemia-reperfusion injury, and cardiac aging
- Neurodegeneration research: Studied in models of mitochondrial-driven neuronal injury
- Longevity research: Evaluated as an intervention for age-related mitochondrial decline
For related anti-aging research peptides, see our peptides for anti-aging guide and the NAD+ research guide.
5. Dosing and Protocol Notes
- Clinical trial doses: 40 mg/day subcutaneous infusion in most phase 2 protocols
- Research dosing: 10-40 mg/day subcutaneous, often in repeated-day protocols
- Reconstitution: Use bacteriostatic water; see our reconstitution and dosage guide
- Protocol duration: Clinical trials commonly run 12-24 weeks; research cycles vary
6. Side Effects and Considerations
- Injection site reactions: Most common adverse event in trials
- Mild systemic effects: Occasional nausea, fatigue, or headache reported
- Interaction with other mitochondria-targeting compounds: Caution advised when combining in research
- Contraindications: Pregnancy and lactation; caution in advanced renal impairment
7. Frequently Asked Questions
Is SS-31 approved? It is an investigational drug in advanced clinical trials; it is not yet approved by major regulatory agencies.
How does SS-31 differ from NMN or NAD+ precursors? NAD+ precursors replenish NAD+ pools, while SS-31 directly stabilizes mitochondrial membrane structure — complementary but distinct mechanisms.
Can SS-31 be used with other peptides? It is commonly studied alongside NAD+ and antioxidant peptides, but protocols should separate administrations.
Related Reading
- NAD+ Peptide and Cellular Energy Guide
- Peptides for Anti-Aging
- Peptides for Cardiovascular Health
- Peptides for Cognitive Function and Brain Health
Shop Related Research Compounds
Browse our research catalog, including SS-31, NAD+, and Humanin, all supplied with batch COAs.
Disclaimer: This article is for educational and research purposes only. SS-31 (elamipretide) is an investigational compound not approved for general human use. Always consult qualified professionals regarding research protocols.
