NSTK · 01.2026Independent supplement reference
NutriStack
Edition 1.0Reviewed May 26, 2026

Elamipretide (SS-31)

Peptide ·Moderate evidence ·Reviewed May 2026

Elamipretide is a mitochondria-targeting tetrapeptide that binds cardiolipin on the inner mitochondrial membrane. As of September 19, 2025, Forzinity (elamipretide) is FDA-approved under accelerated approval to improve muscle strength in adults and children with Barth syndrome weighing at least 30 kg; all wellness, longevity, myopathy, heart failure, and fatigue uses remain investigational or off-label. It should be handled as a prescription specialty drug where approved, not a research peptide supplement.

What it's good for
  • FDA accelerated approval for Barth syndrome muscle strength in patients weighing at least 30 kg, with confirmatory evidence still important3
  • Cardiolipin-binding mitochondrial mechanism1,2
  • Studied in primary mitochondrial myopathy and other mitochondrial disorders1,2
  • Off-label longevity use is not established
What to watch for
  • Injection-site pain
  • Injection-site erythema or pruritus
  • Nausea
  • Use outside FDA-approved Barth syndrome indication without specialist oversight3
  • Known hypersensitivity to elamipretide or excipients1,2

The bottom line

Evidence rating moderate. Most-documented uses: fda accelerated approval for barth syndrome muscle strength in patients weighing at least 30 kg, with confirmatory evidence still important, cardiolipin-binding mitochondrial mechanism, studied in primary mitochondrial myopathy and other mitochondrial disorders. 3 sources indexed (2020–2025), with 3 interaction records on file.

The science

How it works, mechanistically.

Core mechanism

Elamipretide localizes to the inner mitochondrial membrane and associates with cardiolipin, helping stabilize cristae structure, electron transport, and ATP production while reducing pathologic reactive oxygen species in models. Clinical trial results have varied by disease: Barth syndrome received accelerated approval based on muscle-strength data, while primary mitochondrial myopathy phase 3 endpoints were not met. Injection-site reactions are common.1,2

Class
Mitochondrial cardiolipin-binding tetrapeptide
Found in food
None as a dietary supplement
Low-status signs
No recognized dietary deficiency state exists for this peptide
Dosing

Dosing & protocol.

Common range
Forzinity label: 40 mg subcutaneously once daily for indicated Barth syndrome patients; no approved wellness dose
Recommended form
FDA-approved Forzinity under specialist prescription for Barth syndrome; avoid research products

Approved product is subcutaneous injection. Oral research products are not established substitutes.

Forms

Forms & what to buy.

Ranked by evidence and value.

Forzinity Injection Recommended
FDA-approved subcutaneous elamipretide product for indicated Barth syndrome patients. Use exactly per prescribing information.
Premium40 mg subcutaneously once daily for labeled patients
Clinical-Trial Elamipretide
Investigational use for non-Barth indications. Protocol-specific monitoring.
PremiumStudy protocol only
Research SS-31 Product
Not a substitute for FDA-approved product. Identity and sterility are uncertain.
PremiumNo self-use dose
Cost

What it actually costs.

Real-world pricing across three quality tiers. Assumes FDA-approved specialty injection.

BudgetBest value
$9000 /mo
$300 per dose
Mid
$27000 /mo
$900 per dose
Premium
$75000 /mo
$2500 per dose

Specialty-drug costs and coverage vary widely; research products are not substitutes for Forzinity. Updated 2026-06-04.

Goals

Goal-based dosing.

Barth Syndrome Muscle Strength

Dose: 40 mg subcutaneously once daily for patients weighing at least 30 kg3

Timing: Daily per label

FDA accelerated approval; specialist monitoring required.

Primary Mitochondrial Myopathy

Dose: No approved dose for this indication1,2

Timing: Study protocol only

Phase 3 trial did not meet primary endpoints.

Longevity or Fatigue Wellness

Dose: No approved dose1

Timing: Not applicable

Off-label wellness benefit is not established.

Lab work

Markers to track.

What to test, the optimal window inside the conventional range, and how long a response takes.

Lactate

May be followed in mitochondrial disease care but is not a direct response marker for all patients.1,2

Optimal
0.5–2 mmol/L
Conventional
0.5–2.2 mmol/L
Responds in
Baseline and per specialist plan

Interpret with symptoms, genetics, and exercise testing.

Creatine kinaseAcylcarnitine profile

Creatine Kinase CK

May help assess muscle injury but is not specific to elamipretide response.3

Optimal
40–170 U/L
Conventional
40–200 U/L
Responds in
As clinically indicated

Recent exercise can raise CK.

LactateASTALT
Why people use it

Symptoms it's matched to.

Where this appears in the symptom-to-supplement map, ranked by relevance.

Muscle weakness

28% relevance

FDA approval is for improving muscle strength in Barth syndrome patients meeting label criteria.3

MusculoskeletalModerate evidenceForzinity under specialist care

Not for nonspecific weakness without diagnosis.

Exercise intolerance

16% relevance

Mitochondrial disease trials are relevant, but PMM phase 3 endpoints were not met.1,2

EnergyEmerging evidenceSpecialist-directed only

Evaluate cardiopulmonary and mitochondrial causes.

Mitochondrial disease fatigue

12% relevance

Mechanism is mitochondrial, but benefit is diagnosis-specific.1,2

EnergyEmerging evidenceSpecialist-directed only

Avoid research products.

Safety

Full safety detail.

Side effects

  • Injection-site pain
  • Injection-site erythema or pruritus
  • Nausea
  • Headache
  • Dizziness
  • Hypersensitivity reaction
  • Unknown long-term off-label safety

Contraindications

  • Use outside FDA-approved Barth syndrome indication without specialist oversight3
  • Known hypersensitivity to elamipretide or excipients1,2
  • Pregnancy and breastfeeding without specialist review
  • Research-grade or compounded products substituted for Forzinity
  • Mitochondrial symptoms without diagnostic evaluation1,2
Interactions

Interaction records.

InfoSynergy

Coenzyme Q10

CoQ10 is often used in mitochondrial care, but it does not replace Forzinity or prove off-label benefit.

Recommendation: Coordinate mitochondrial supplements with the treating specialist.

InfoCaution

Creatine

Creatine may affect muscle performance metrics and complicate interpretation of treatment response.

Recommendation: Keep supplement use stable during monitored strength testing.

ModerateCaution

Alpha-Lipoic Acid

Alpha-lipoic acid can lower glucose and is used for mitochondrial redox claims, complicating adverse-effect attribution.

Recommendation: Use only with clinician awareness in mitochondrial protocols.

Sources

Sources, by evidence tier.

Numbered references. Citations throughout the page link here.

Randomized controlled trials

2
  • 1Efficacy and Safety of Elamipretide in Individuals With Primary Mitochondrial Myopathy: The MMPOWER-3 Randomized Clinical TrialNeeds sourceNo linkKaraa A et al. · Neurology · 2023

    Primary endpoints were not met

  • 2A randomized crossover trial of elamipretide in adults with primary mitochondrial myopathyNeeds sourceNo linkKaraa A et al. · Journal of Cachexia, Sarcopenia and Muscle · 2020

    Short-term crossover data suggested signals

Reference material

1
  • 3Drug Trials Snapshots: ForzinityNeeds sourceNo linkUS Food and Drug Administration · FDA Drug Trials Snapshots · 2025

    Approved September 19, 2025 under accelerated approval; the initial randomized portion did not show superiority on primary endpoints.

Keep exploring

Deep dives & adjacent profiles.

This page is educational. Do not start, stop, or change a supplement or medication based on it without checking with a qualified healthcare professional.

Use this with your stack

Elamipretide (SS-31) in NutriStack.

Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.

NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.