SS-31 vs MOTS-c
SS-31, also known as elamipretide, and MOTS-c are both peptides studied in mitochondrial and longevity research, but they are described as acting in different ways. SS-31 is researched for concentrating in the inner mitochondrial membrane and interacting with cardiolipin, a phospholipid that shapes membrane structure. Studies have examined its effects on electron-transport efficiency and oxidative stress. MOTS-c is a peptide encoded in mitochondrial DNA and is studied as a signal that translocates to the nucleus under metabolic stress, with research focused on AMPK-associated pathways. SS-31 has been evaluated in a phase 3 trial in primary mitochondrial myopathy and in heart failure research. MOTS-c research, mainly in animal and cell models, has examined obesity, insulin resistance, bone metabolism and islet cell senescence.
Key differences
- 01
SS-31 is studied for binding cardiolipin within the inner mitochondrial membrane, whereas MOTS-c is studied as a mitochondrial-DNA-encoded signal that moves to the nucleus and influences genes tied to metabolic homeostasis.
- 02
SS-31 research centers on electron-transport efficiency and oxidative stress, while MOTS-c research centers on AMPK-associated pathways governing how cells manage energy availability and stress.
- 03
SS-31 has been evaluated in the MMPOWER-3 phase 3 randomized trial in primary mitochondrial myopathy, and a 2026 review reports its first regulatory approval, whereas MOTS-c research consists mainly of animal and cell studies with no late-stage trials or approvals described.
- 04
SS-31 has been studied in heart failure, cardiomyocyte injury and neuroinflammation models, while MOTS-c has been studied in obesity, insulin resistance, gestational diabetes, bone metabolism and lung ischemia-reperfusion models.
- 05
Safety was an evaluated endpoint in a phase 3 trial of SS-31, whereas human safety data for MOTS-c are limited and its long-term effects in humans have not been characterized.
Side by side
Inner mitochondrial membrane, oxidative stress
Mitochondrial activation, metabolic flexibility
Approved analog
Preclinical
Longevity
Longevity
Subcutaneous
Subcutaneous
Research protocols have used 1–10 mg per administration, 3 times per week (morning), in 8-week blocks with 4 weeks off.
Research protocols have used 500–5,000 mcg per administration, 3 times per week (morning, fasted), in 8-week blocks with 4 weeks off.
- Cardiolipin binding in the inner mitochondrial membrane
- Electron-transport efficiency and oxidative stress
- Primary mitochondrial myopathy in a phase 3 clinical trial
- Mitochondrial dysfunction in heart failure research
- Synaptic and memory impairment in mouse models of inflammation
- Cardiomyocyte hypoxia/reoxygenation injury in cell models
- Metabolic homeostasis, obesity and insulin resistance in animal models
- Hyperglycemia and insulin resistance in gestational diabetes research
- Pancreatic islet cell senescence and diabetes onset
- Bone metabolism regulation
- Lung ischemia-reperfusion injury and antioxidant gene activation
- Ovarian cancer progression in laboratory studies
- Safety was an evaluated endpoint in the MMPOWER-3 phase 3 trial in primary mitochondrial myopathy
- Specific adverse events are not summarized in the cited study titles
- Much of the mechanistic evidence comes from animal and cell studies
- Human safety data are limited
- Adverse events are not summarized in the cited studies
- Long-term effects in humans have not been characterized
5 cited studies
5 cited studies
Studied ranges describe what published research protocols have used. They are not instructions or recommendations. Products are sold for research purposes only; each order ships with a protocol guide for the specific product.
Mechanism
SS-31
Research describes SS-31 as concentrating in the inner mitochondrial membrane and interacting with cardiolipin, studied for effects on electron-transport efficiency and oxidative stress.
Cardiolipin Affinity
Studied for selective binding to a phospholipid that shapes the structure of the inner mitochondrial membrane.
Redox Balance
Explored for effects on electron-transport efficiency and the oxidative by-products of energy production.
MOTS-c
Research describes MOTS-c as translocating to the nucleus under metabolic stress, where it is studied for effects on genes governing metabolic homeostasis, largely via AMPK-associated pathways.
Mitochondrial Origin
Encoded within mitochondrial DNA and studied as a signal between the mitochondria and the rest of the cell.
Metabolic Response
Explored in research on AMPK-associated pathways governing how cells manage energy availability and stress.
