Informational only. Not medical advice.INFORMATIONAL PLATFORM ONLY — NOT MEDICAL ADVICE, DIAGNOSIS, OR TREATMENT
Informational only. Not medical advice.INFORMATIONAL PLATFORM ONLY — NOT MEDICAL ADVICE, DIAGNOSIS, OR TREATMENT
A mitochondria-targeted tetrapeptide (D-Arg-Dmt-Lys-Phe-NH2). FDA-approved in September 2025 (as FORZINITY) for Barth syndrome — the first approved mitochondria-targeted therapy. Investigational for other indications with mixed trial results.
Lowest Price
$37.89
Highest Price
$1125.00
Average Price
$163.92
Potential Savings
89%
across 30 options
6 of 30 vendors are lab-verified for SS-31
We cross-check each vendor's Certificate of Analysis against the issuing lab's own verification portal — so “cheapest” isn't the only signal.
Best price trend
Lowest $/mg for SS-31 · last 39 days
$1.88/mg
▼ 16% vs 39d ago
Trust grade first, cheapest within grade
vial · 10mgglacieraminos.shop· price updated today
Lot MTP10GA-03· tested 2026-03-13
$5.00/mg
83% more per mg
vial · 50mgionpeptide.com· price updated today
Lot 2S10-05042026· tested 2026-05-08
$2.78/mg
70% more per mg
vial · 500mgpeptide.partners· price updated today
Lot SY20250806· tested 2025-09-19
$2.25/mg
63% more per mg
vial · 10mgpeptidesupplyco.com· price updated 2d ago
Lot PSCSS3150001· tested 2026-02-11
$5.00/mg
83% more per mg
vial · 50mghydroresearchpeptides.com· price updated today
Lot SS31-003· tested 2024-10-04
$200.00−13%
$175.00$3.50/mg
76% more per mg
vial · 10mgascensionpeptides.com· price updated today
$79.99−6%
$74.99$7.50/mg
89% more per mg
vial · 500mgzztai-tech.com· price updated today
$0.834/mg
vial · 10mgtexpeptide.com· price updated today
$55.00−9%
$50.00$5.00/mg
83% more per mg
vial · 10mgforgeperformanceco.com· price updated today
Lot Blue Top· tested 2026-03-23
$5.00/mg
83% more per mg
vial · 50mgpeptideplugs.com· price updated today
Lot 121-A-D· tested 2026-04-20
$3.20/mg
74% more per mg
vial · 100mgreta-peptide.com· price updated today
$0.850/mg
2% more per mg
vial · 50mglicensedpeptides.com· price updated today
$272.21−10%
$244.99$4.90/mg
83% more per mg
vial · 50mgs1research.net· price updated today
$119.00−21%
$94.00$1.88/mg
56% more per mg
vial · 50mgamc-essentials.com· price updated today
$2.00/mg
58% more per mg
vial · 50mgmodernresearchpeptides.net· price updated today
$2.12/mg
61% more per mg
vial · 50mgnextechlaboratories.com· price updated today
$2.30/mg
64% more per mg
vial · 50mgpeptira.com· price updated today
$2.78/mg
70% more per mg
vial · 50mgplatinumlionpeptides.com· price updated today
$175.00−20%
$139.99$2.80/mg
70% more per mg
vial · 50mgaminosequence.com· price updated today
$2.90/mg
71% more per mg
vial · 50mgtruepeptidelabs.com· price updated yesterday
$185.00−14%
$160.00$3.20/mg
74% more per mg
nasal · 30mggeneticpeptide.com· price updated today
$149.99−33%
$99.99$3.33/mg
75% more per mg
vial · 50mgwellnesspeptides.io· price updated yesterday
$3.50/mg
76% more per mg
vial · 10mgalpha-peptides.com· price updated today
$42.99−12%
$37.89$3.79/mg
78% more per mg
vial · 50mgatomiklabz.com· price updated today
$3.98/mg
79% more per mg
vial · 50mgsolutionpeptides.net· price updated today
$3.98/mg
79% more per mg
vial · 30mgonedaycompounds.com· price updated today
$4.83/mg
83% more per mg
vial · 25mgyoursoma.com· price updated today
$4.84/mg
83% more per mg
vial · 25mgpolarispeptides.com· price updated today
$5.16/mg
84% more per mg
vial · 10mgsouthernaminos.com· price updated today
$69.00−25%
$51.75$5.17/mg
84% more per mg
vial · 25mgfelixchem.is· price updated today
$5.60/mg
85% more per mg
Check formulation: Lyophilized powder requires reconstitution before use. Pre-mixed solutions are more convenient but may have a shorter shelf life and higher prices.
Compare per-mg cost: Different strengths and quantities make direct price comparison difficult. Calculate the per-milligram cost to find the true best value.
Verify COAs: Look for vendors that publish per-batch Certificates of Analysis from named, accredited labs. Every vendor on this page is verified for endotoxin testing — not just HPLC purity.
The original SS-peptide class was described by Zhao, Szeto and colleagues (J Biol Chem 2004, PMID 15178689), showing ~1000-fold concentration at the inner mitochondrial membrane and protection against oxidative cell death. Szeto's 2014 review (Br J Pharmacol, PMID 24117165) reframed the mechanism as cardiolipin-binding rather than antioxidant scavenging. The TAZPOWER trial (NCT03098797) in Barth syndrome, with its 168-week open-label extension (Thompson et al., Genet Med 2024, PMID 38602181), supported FDA accelerated approval of FORZINITY in September 2025 at 40 mg SubQ daily. The Phase 3 MMPOWER-3 trial in primary mitochondrial myopathy (Karaa et al., Neurology 2023, PMID 37268435) FAILED co-primary endpoints of 6-minute walk test and fatigue score, though a post-hoc nuclear-DNA subgroup showed improvement. Phase 2 ReCLAIM-2 in geographic atrophy missed primary endpoints but reduced ellipsoid-zone attenuation; a Phase 3 trial is ongoing. Earlier heart failure trials (PROGRESS-HF) showed only modest signals.
This platform provides informational tools only, not medical advice.
Zhao K et al. Cell-permeable peptide antioxidants targeted to inner mitochondrial membrane inhibit mitochondrial swelling, oxidative cell death, and reperfusion injury (original SS-peptide report, J Biol Chem)
2004
Szeto HH. First-in-class cardiolipin-protective compound as a therapeutic agent to restore mitochondrial bioenergetics (Br J Pharmacol review)
2014
Karaa A et al. Efficacy and Safety of Elamipretide in Primary Mitochondrial Myopathy: The MMPOWER-3 Randomized Clinical Trial (Neurology)
Prices verified as of June 2026. Actual prices may vary. For research use only.
Prices are estimates and may vary. For research use only. We may earn a commission on purchases through affiliate links. Not medical advice.
2023
Disclosed Labs