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SS-31

Elamipretide, MTP-131, Bendavia

Tier 2 · Clinical Trials
Class
Mitochondria-targeting tetrapeptide
Molecular target
Cardiolipin (inner mitochondrial membrane)
Sequence / structure
D-Arg-Dmt-Lys-Phe-NH2
Evidence tier
Tier 2 — Clinical Trials
Category
Mitochondrial & Longevity

Biology & mechanism

An aromatic-cationic tetrapeptide that concentrates in the inner mitochondrial membrane, where it binds cardiolipin — the signature phospholipid of that membrane. By stabilising cardiolipin interactions with cytochrome c and respiratory supercomplexes, it aims to improve electron transport efficiency and reduce reactive oxygen species generation. Mechanistically the most specific target in this category.

What the research actually shows

The most clinically advanced peptide in the longevity group. Multiple trials in primary mitochondrial myopathy, Barth syndrome, and ophthalmic disease. Results have been mixed, and the regulatory path has been difficult — efficacy has not been straightforwardly established.

Regulatory status

Not FDA-approved. Investigational, with an active clinical development programme. Status has shifted repeatedly; verify current position.

Safety signals

Trial safety data exist — a meaningful distinction from most peptides here. Injection-site reactions common. Efficacy, not safety, has been the limiting question.

No usage guidance is published here

Forge Bioenergy does not publish dosing, reconstitution, or administration protocols for any peptide. See our editorial policy for why. If you are considering any substance on this page, that conversation belongs with a licensed physician.

References & further reading

Regulatory status changes. This page reflects our reading of public sources as of July 2026 and should be independently verified before it is relied upon.

Important notice Forge Bioenergy publishes scientific reference information only. Nothing on this site is medical advice, a therapeutic claim, or a recommendation to use any substance in humans. Many peptides described here are not approved by the FDA for any use, and several are approved only for narrow indications under prescription. We do not publish dosing, administration, or usage protocols. Consult a licensed physician before making any medical decision.