Where to Buy SS-31: Price & Vendor Guide

SS-31 (elamipretide) is the mitochondrial peptide that earned FDA approval in September 2025 — but only for Barth syndrome. For general research use, it's still only available from specialty peptide vendors, where pricing varies from $3/mg to $13/mg for essentially the same 639.8 Da molecule. The spread is huge, and it's entirely driven by vendor markup and vial size choice.

This guide covers what you should pay per milligram, which vial size fits a standard 500 mcg/day protocol, and how to verify a COA for this uniquely-structured tetrapeptide. SS-31 contains 2,6-dimethyltyrosine (Dmt) — an unusual modification that a legitimate vendor's mass spec will confirm.

This is not a ranked vendor list — for that, see our Best SS-31 Vendors comparison. This guide teaches you how to evaluate any vendor yourself.

Understanding SS-31 Pricing

SS-31 is sold as a lyophilized powder in sealed glass vials. Because it's a small tetrapeptide, synthesis is relatively cheap — but demand is high and many vendors charge accordingly. The three factors that move price: vial size, manufacturer sourcing, and whether the vendor pays for third-party testing.

Current Market Pricing (2026)

The pattern is clear: the 50mg vial costs roughly $3/mg — less than a quarter of the 5mg vial's price. But you need to commit to a reconstitution strategy that respects the 28-day stability window.

Cost Per Week at Common Doses

For current vendor-specific pricing with exact $/mg breakdowns, see our Best SS-31 Vendors comparison.

How to Verify SS-31 Quality

SS-31 is a synthetic tetrapeptide with an unusual structure: D-Arg-Dmt-Lys-Phe-NH2. The 2,6-dimethyltyrosine (Dmt) residue is what lets it target mitochondrial cardiolipin, and it's expensive to synthesize correctly. A vendor selling "SS-31" for $1/mg may be selling a simpler Arg-Tyr-Lys-Phe sequence without the Dmt modification — identical looking on a cheap assay, completely non-functional in practice.

What a COA (Certificate of Analysis) Should Include

Identity Confirmation

• Mass spectrometry confirming the correct molecular weight (639.8 Da for SS-31)
• Amino acid sequence verification matching D-Arg-Dmt-Lys-Phe-NH2
• Confirmation of the Dmt (2,6-dimethyltyrosine) residue — the most critical modification

Purity Testing

• HPLC purity — look for 98%+ purity
• The chromatogram should show a single dominant peak with minimal truncated-sequence impurities

Contamination Testing

• Endotoxin levels (bacterial contamination)
• Residual solvent analysis (acetonitrile, TFA)
• Heavy metals screening

How to Verify a COA Is Legitimate

1. Check the testing lab — Reputable labs include Janoshik Analytical, MZ Biolabs, and Colmaric Analyticals. Avoid vendors who only show "in-house" testing.

2. Verify on the lab's website — Janoshik COAs have a task number you can look up directly at janoshik.com. If the vendor won't provide a verifiable task number, that's a red flag.

3. Check the date — COAs should be recent (within 6 months). Old COAs may not represent the current batch.

4. Match the batch — The batch/lot number on the COA should match what's printed on your vial.

5. Look for the original PDF — Screenshots are easier to fake than full PDFs with lab letterhead and signatures.

Red Flags to Avoid

• No COA available — without confirming the Dmt residue, you have no idea if you're buying real SS-31
• Only in-house testing — self-reported purity numbers are meaningless
• Prices below $2/mg across all sizes — synthesis of the Dmt residue is expensive; this signals a substituted sequence
• No contact information — legitimate vendors have real customer service
• Cryptocurrency only — good vendors accept crypto but also standard payment rails
• No return or reship policy — reputable vendors stand behind their products

Choosing the Right Vial Size

Vial size selection isn't just about price — it's about matching your protocol duration to the 28-day reconstitution stability window.

The 28-Day Rule

Once reconstituted with bacteriostatic water, SS-31 is stable for up to 28 days refrigerated. SS-31 is a small, relatively stable tetrapeptide but the standard peptide rules still apply. See our SS-31 reconstitution guide for the full mixing protocol.

⚠️ = exceeds 28-day window per reconstitution

Solution: For larger vials, split into multiple reconstitutions. Reconstitute only half the vial with the appropriate BAC water volume and leave the other half as powder until you need it.

Recommended Vial Size by Protocol

Tolerance testing or short trial:

• 5mg vial — lowest upfront cost, 10 days at 500 mcg/day
• Not cost-effective beyond the first trial

Standard 500 mcg/day protocol:

• 10mg vial — lasts 20 days at 500 mcg/day, inside the 28-day window
• The simplest and most popular size

Long-term mitochondrial protocol (5-on/2-off):

• 30mg or 50mg vial — maximum per-mg value
• Requires splitting reconstitution: mix 10mg at a time, store the rest sealed

Buying Multiple Smaller vs One Large Vial

Our recommendation: For first-time users, start with a 10mg vial. Once established on a 500 mcg/day or 5-on/2-off protocol, the 50mg vial's ~60% per-mg savings is worth the reconstitution planning.

Vendor Evaluation Methodology

When comparing SS-31 vendors, we evaluate three weighted factors:

Price Competitiveness (40%)

We normalize to cost per milligram for fair comparison across vial sizes. A vendor selling 50mg at $160 ($3.20/mg) scores higher than one selling 10mg at $80 ($8/mg), all else being equal.

COA & Testing (30%)

We verify that COAs are:

• From recognized third-party labs
• Recent (within the last 6 months)
• Verifiable on the lab's website
• Confirming the Dmt residue — critical for SS-31 specifically

Reputation (30%)

Community feedback from peptide forums, shipping reliability, customer service responsiveness, and business track record. We give additional weight to vendors with consistent multi-year operations.

Shipping and Storage

What to Expect When Your Order Arrives

Lyophilized SS-31 should arrive as a white or off-white powder cake in a sealed glass vial. Check:

• Vial integrity — no cracks, proper rubber seal, aluminum cap intact
• Powder appearance — solid cake or loose powder, NOT liquid or discolored
• Labeling — batch/lot number, milligram content, "for research use only"
• Cold pack — reputable vendors ship with cold packs in summer months

Storage Guidelines

Key point: Keep unreconstituted vials refrigerated. SS-31 is protected from light in the vial, but avoid prolonged UV exposure once reconstituted.

Frequently Asked Questions

Is SS-31 legal to buy?

SS-31 is sold as a research chemical and is legal to purchase in most jurisdictions for research purposes. Elamipretide (the pharmaceutical form) received FDA approval in September 2025 for Barth syndrome only, not for general use. Research-grade SS-31 is labeled "not for human consumption."

How much does SS-31 cost per month?

At the community-standard 500 mcg/day protocol, SS-31 runs $45-120/month from a reputable vendor using a 10mg vial. Stepping to a 50mg vial drops this to about $20-40/month — a 60% savings if you're committed to a longer protocol.

What vial size should I buy?

For 500 mcg/day, a 10mg vial lasts 20 days — inside the 28-day window and the simplest to manage. For long-term protocols (5-on/2-off or daily use over multiple months), a 50mg vial offers the best per-mg value, but requires splitting reconstitutions.

What purity should I look for?

Look for vendors providing third-party COA testing showing 98%+ purity via HPLC, plus mass spec confirming the 639.8 Da molecular weight and the Dmt (2,6-dimethyltyrosine) modification. Without the Dmt residue, you don't have SS-31.

Can I buy SS-31 from a pharmacy?

Elamipretide is FDA-approved only for Barth syndrome and is prescription-only with no general use indication. Research-grade SS-31 is only available from specialty peptide vendors, not pharmacies.

How do I know if a vendor is trustworthy?

Check for: third-party COA testing that confirms the Dmt residue, verifiable lab results, responsive customer service, community reputation on peptide forums, consistent pricing, and a clear return/reship policy. See our Best SS-31 Vendors for pre-vetted options.

Related Guides

• Best SS-31 Vendors — ranked vendor comparison with live pricing
• SS-31 Dosing Guide — 500 mcg/day, 5-on/2-off protocol
• SS-31 Reconstitution Guide — step-by-step mixing and dilution charts
• SS-31 Benefits — mitochondrial function, energy, recovery
• SS-31 Results Timeline — week-by-week expectations
• SS-31 Bloodwork Guide — what to track on a mitochondrial protocol
• SS-31 Clinical Research — the evidence base and Barth syndrome approval
• Compare SS-31 Prices by $/mg — every vendor ranked side by side
• Calculate Your SS-31 Cycle Cost — estimate vials needed and total cost
• Current Peptide Deals & Coupons — active vendor discount codes

Related Reading

• SS-31 vs MOTS-c — mitochondrial peptides compared
• How Peptides Work — understanding mitochondrial targeting

References

This article is for educational and informational purposes only. It is not medical advice and should not be used to diagnose, treat, or prevent any condition. Consult a licensed healthcare provider before using any peptide.