MOTS-c vs SS-31.
Quick Verdict
MOTS-c is a mitochondrial peptide primarily researched for energy, metabolism, fat loss, longevity, while SS-31 is a mitochondrial peptide studied for energy, recovery, neuroprotection.
Side-by-Side Analysis
| Dimension | MOTS-c | SS-31 |
|---|---|---|
| Category | Mitochondrial Peptide | Mitochondrial Peptide |
| Mechanism | Regulates mitochondrial function and AMPK. | Mitochondrial protection. |
| Half-Life | ~4 hours | ~4 hours |
| Route | SubQ | SubQ |
| Typical Dose | 2000–2000 mcg | 4000–4000 mcg |
| Frequency | 5x/week | 7x/wk |
| Evidence Level | Emerging | Moderate |
| Indexed Studies | 20+ indexed | 20+ indexed |
| FDA Status | Research Only | Research Only |
| Lowest Price | $39.99 / 10mg via Amino Club | $75.00 / 10mg via Ascension Peptides |
| Per-mg Cost | $4.00/mg | $7.50/mg |
Mechanism of Action Comparison
How MOTS-c Works
MOTS-c MOTS-c is a peptide encoded in mitochondrial DNA studied for improving insulin sensitivity, boosting exercise performance, and protecting against the metabolic decline that comes with aging.
Regulates mitochondrial function and AMPK. Enhances glucose uptake and fatty acid oxidation, improves insulin sensitivity, and protects against age-related metabolic decline.
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
Both MOTS-c and SS-31 belong to the Mitochondrial Peptide class, but differ in their specific molecular targets and pharmacokinetic profiles.
Research Evidence
MOTS-c
20 studies- MOTS-c regulates metabolic homeostasis (Cell Metabolism)Lee et al. (Cell Metabolism): Discovery paper showing MOTS-c is a mitochondrial-derived peptide that regulates insulin s…Emerging
- MOTS-c prevents age-related insulin resistance in miceLee et al.: MOTS-c treatment prevents both age-dependent and high-fat-diet-induced insulin resistance and diet-induced o…Preclinical
- MOTS-c improves skeletal muscle glucose metabolismStudy demonstrating MOTS-c specifically targets skeletal muscle glucose metabolism, providing molecular basis for metabo…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 2026MOTS-c
4 vendorsSS-31
1 vendorAffiliate disclosure: PeptiDex may earn a commission from purchases via vendor links at no extra cost to you. See our methodology.
Frequently Asked Questions
Can I take MOTS-c and SS-31 together?▼
Yes — MOTS-c 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 — MOTS-c or SS-31?▼
MOTS-c has 20 indexed studies (highest evidence: Emerging). SS-31 has 20 indexed studies (highest evidence: Moderate). Both have comparable research coverage.
What is the price difference between MOTS-c and SS-31?▼
At current verified vendor prices, MOTS-c starts at $4.00/mg while SS-31 starts at $7.50/mg. Prices vary by vendor and vial size — see the full vendor comparison below.
Which is better for longevity — MOTS-c or SS-31?▼
Both are researched for longevity. MOTS-c addresses this via energy, metabolism, fat loss, 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.