SS-31
WellnessAlso known as: Elamipretide, Bendavia, MTP-131
Emerging ResearchWhat is SS-31?
A synthetic mitochondrial-targeted peptide that concentrates in the inner mitochondrial membrane. Developed for mitochondrial diseases and heart failure, SS-31 has gained significant attention in the longevity community for its potential to restore age-related mitochondrial dysfunction.
How it works
Selectively binds to cardiolipin, a phospholipid unique to the inner mitochondrial membrane that is essential for electron transport chain function. By stabilizing cardiolipin, SS-31 improves electron flow, reduces reactive oxygen species (ROS) production at the source, and restores ATP generation — effectively optimizing mitochondrial bioenergetics rather than simply scavenging free radicals after they form.
What marketers claim
- ▸reverses mitochondrial aging
- ▸restores youthful cellular energy
- ▸cures mitochondrial diseases
- ▸the most powerful anti-aging peptide available
What evidence supports
- ✓improved mitochondrial function and reduced ROS in multiple animal models of aging
- ✓restored cardiac function in animal models of heart failure
- ✓human clinical trials completed for Barth syndrome (rare mitochondrial disease) with measurable improvements
- ✓improved exercise tolerance in heart failure patients in phase II trials
- ✓reduced kidney damage biomarkers in renal ischemia-reperfusion studies
Research evidence
Key studies on SS-31, summarized in plain language. This is not an exhaustive list — it highlights the most relevant findings.
SS-31 (elamipretide) reverses age-related mitochondrial dysfunction in murine skeletal muscle
Finding: Eight days of SS-31 treatment in aged mice restored mitochondrial energetics, reduced hydrogen peroxide production, and improved exercise tolerance to levels approaching young controls.
Limitation: Mouse study with short treatment duration. Translational relevance to human aging is assumed but not established.
Elamipretide in patients with Barth syndrome (TAZPOWER phase III)
Finding: Did not meet primary endpoint (6-minute walk distance). However, significant improvements observed in cardiac stroke volume and secondary functional endpoints.
Limitation: Very small sample size due to rare disease. Failed primary endpoint limits regulatory conclusions despite positive secondary signals.
Effects of elamipretide on left ventricular function in patients with heart failure with reduced ejection fraction
Finding: Single infusion of elamipretide showed dose-dependent improvements in left ventricular end-systolic volume, suggesting improved cardiac function.
Limitation: Single-dose study. Longer-term efficacy and safety not established. Heart failure population, not healthy aging.
Best for
What to expect
Realistic timeline based on available research. Individual results vary.
Week 1-2
No established timeline for healthy individuals. Clinical trials in disease states show measurable changes in mitochondrial biomarkers within days of administration.
Week 4-8
Heart failure trials showed improved exercise capacity (6-minute walk distance) within 4 weeks. Anecdotal longevity users report improved energy and exercise recovery.
Month 3+
Animal aging models show sustained improvements in mitochondrial function, organ function, and physical performance with continued administration. Human long-term data is limited.
Safety notes & concerns
Full safety guide →- ⚠not FDA-approved — failed to meet primary endpoint in pivotal Barth syndrome trial despite showing biological activity
- ⚠injection site reactions reported in clinical trials
- ⚠long-term safety data in healthy individuals is very limited
- ⚠most aging-related evidence comes from animal models, not humans
- ⚠sourcing from research chemical suppliers carries purity and contamination risks
Pairs well with
Use caution with
Frequently asked questions
How is SS-31 different from regular antioxidants?
Traditional antioxidants like vitamin C or E work by neutralizing free radicals after they are produced. SS-31 takes a fundamentally different approach — it stabilizes the mitochondrial membrane to prevent excessive ROS production in the first place. This upstream mechanism is why researchers consider it more promising than conventional antioxidant supplementation for mitochondrial dysfunction.
Why did SS-31 fail its Barth syndrome trial?
The pivotal phase III trial did not meet its primary endpoint (6-minute walk distance improvement) despite showing improvements in secondary endpoints like cardiac stroke volume and biomarkers. This is common in rare disease trials with small sample sizes and variable disease severity. The biological activity was real, but the trial design may not have captured it in the primary outcome.
Is SS-31 related to MOTS-c?
Both target mitochondria but through completely different mechanisms. MOTS-c is a naturally occurring mitochondrial-derived peptide that activates AMPK signaling. SS-31 is a synthetic peptide that directly stabilizes the inner mitochondrial membrane. They represent complementary approaches to mitochondrial health and are sometimes discussed together in longevity circles.
Products containing SS-31
MitoQ
MitoQ Pure Advanced Mitochondria Supplement
The leading mitochondria-targeted CoQ10 supplement; Mitoquinol is designed to concentrate inside mitochondria at 100–1000x higher levels than standard CoQ10, making it relevant for anyone researching SS-31 and mitochondrial optimization
NatureBell
PQQ 40mg with CoQ10
Best-value PQQ + CoQ10 stack for mitochondrial biogenesis support; PQQ stimulates new mitochondria formation while CoQ10 supports electron transport — complementary to the membrane-stabilizing mechanism of SS-31
Life Extension
Mitochondrial Energy Optimizer with PQQ
The most comprehensive mitochondrial support formula available; combines PQQ for biogenesis, carnosine for glycation protection, R-lipoic acid for antioxidant recycling, and taurine for membrane stability — multiple complementary mechanisms relevant to SS-31 researchers
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Last updated: 2026-04-26
Medical Disclaimer
The information on this site is for educational and informational purposes only. It is not intended as medical advice and should not be used to diagnose, treat, or prevent any condition. Always consult with a qualified healthcare professional before starting any new supplement, peptide, or treatment protocol.