What it is: A synthetic mitochondria-targeting tetrapeptide, also called Elamipretide or MTP-131.
Research suggests: Some studies have explored whether it may interact with components of the mitochondrial membrane. Findings are early and not settled.
Best for: Researchers interested in mitochondrial biology and cellular energy.
Key thing to know: It has been studied in human trials, but several did not meet their goals. Not approved for general use.
What is SS-31?
SS-31 is a synthetic tetrapeptide that has been studied for its tendency to concentrate within mitochondria, the energy-producing structures inside cells. It belongs to a class known as Szeto-Schiller (SS) peptides, named for the researchers who first described them. Research interest has centered on the mitochondrial membrane, though much about its activity remains under investigation.
How it works.
Some research has examined whether SS-31 associates with cardiolipin, a phospholipid found mainly in the inner mitochondrial membrane that helps organize the proteins involved in cellular energy production. The hypothesis explored in these studies is whether such binding might influence mitochondrial stability and the byproducts of energy metabolism.
This proposed mechanism is not fully established, and results from laboratory and animal studies have not consistently been confirmed in humans. It should be understood as an area of ongoing research rather than a settled explanation.
What the research shows.
SS-31 and elamipretide have been evaluated in human clinical trials for conditions including primary mitochondrial myopathy and certain cardiac and ophthalmic indications. Notably, several of these trials did not meet their primary endpoints. It is not approved for general or anti-aging use, and the broader research remains inconclusive.
Biomarkers to review first.
Research discussions of SS-31 often reference the following biomarkers as baseline context. Reviewing these with a licensed healthcare provider before exploring this peptide gives you the most relevant starting information.
What it's commonly researched with.
SS-31 appears in mitochondrial and cellular aging discussions alongside other compounds studied for cellular energy metabolism. The combination below reflects what appears in research literature, not recommendations for use without clinical supervision.