sS-31 calculator
10 mg in 2 mL = 5 mg/mL; 10 units on a U-100 syringe holds 0.5 mg.
Sizes on sale: 10mg, 30mg, 50mg. Choose a vial, the water and the amount per draw; prices are the lowest current US offers.
price, vial size and certificate correction
Lowest current US offer for this size.
Most 2–15 mg vials hold 3 mL.
From the lot certificate; it replaces the label amount.
Certificates on file for this compound:
- LA Peptides 10mg · lot 1318 · 2026-06-15 · Bioviridian Inc.: 10.29 mg measured, 99.6% purityCOA
5 mg/mL
10 units holds 0.5 mg
- concentration
- 5 mg/mL
- per unit
- 50 mcg per unit
- full draws per vial
- —
- cost per draw
- —
the working
- 10 mg ÷ 2 mL = 5 mg/mL
If this is a prescription, the dose and volume on your pharmacy label take priority. Ask your pharmacist about any mismatch.
cheapest way to buy it
| vendor | size | price | $/mg | checked | calculate with this vial, or view it |
|---|---|---|---|---|---|
| LA Peptidesfeatured partnerCOA 50.38 mg | 50mg | $150.00 | $3.00 | 2026-11-03 | view, SS-31 50mg at LA Peptides, opens in a new tab |
| American Peptides | 50mg | $215.00 | $4.30 | 2026-11-06 | view, SS-31 50mg at American Peptides, opens in a new tab |
| LA Peptidesfeatured partnerCOA 10.29 mg | 10mg | $49.99 | $5.00 | 2026-11-03 | view, SS-31 10mg at LA Peptides, opens in a new tab |
| American Peptides | 30mg | $160.00 | $5.33 | 2026-11-06 | view, SS-31 30mg at American Peptides, opens in a new tab |
| American Peptides | 10mg | $70.00 | $7.00 | 2026-11-06 | view, SS-31 10mg at American Peptides, opens in a new tab |
In-stock US offers checked in the last 7 days, before shipping. The featured partner is a paid placement and is labelled; order here is by price per mg.
FDA-approved · cited sources
doses of SS-31 used in research
FDA-approved in September 2025 (accelerated approval) as Forzinity to improve muscle strength in Barth syndrome patients weighing at least 30 kg; the label dose is 40 mg subcutaneously once daily. These are the amounts specific labels and studies used, linked to each source. They are references, not recommendations; a prescription label takes priority.
| source | who | amount and schedule | route |
|---|---|---|---|
| Forzinity label: 40 mg SC once daily FDA label · 2025 · DailyMed setid 146bf34c-76f2-48db-ac07-fb29cce2cd75 | Adult and pediatric patients with Barth syndrome weighing at least 30 kg | 40 mg once daily continuous 20 mg once daily when renal function is below 30 mL/min and the patient is not on dialysis (label Table 1). Inject in the abdomen or outer thigh, rotating sites daily. No titration. Supplied as a 280 mg/3.5 mL (80 mg/mL) solution in single-patient-use vials. | subcutaneous |
| MMPOWER-3 Phase 3 (Neurology 2023): 40 mg SC daily phase 3 trial · 2023 · PMID:37268435 | People aged 16-80 (18+ in Germany) with genetically confirmed primary mitochondrial myopathy (n = 218) | 40 mg once daily 24 weeks NCT03323749. Self-injected in the abdomen or thigh. Did not meet its primary endpoints (6-minute walk, fatigue); well tolerated. | subcutaneous |
| TAZPOWER Phase 2/3 (Genet Med 2021): 40 mg SC daily phase 2 trial · 2021 · PMID:33077895 | Males 12 years and older with Barth syndrome (n = 12) | 40 mg once daily two 12-week crossover periods with a 4-week washout, then open-label extension (36 weeks of open-label treatment reported) NCT03098797. Primary endpoints not met in the crossover; improvements reported at 36 weeks of open-label treatment. A 2024 report (PMID 38602181) covers 168 weeks of the extension. | subcutaneous |
Sources checked Nov 4, 2026.
SS-31 10mg in 2 mL
amount to syringe units
| amount | mL | U-100 units | U-40 units |
|---|---|---|---|
| 100 mcg | 0.02 | 2 | 0.8 |
| 250 mcg | 0.05 | 5 | 2 |
| 500 mcg | 0.1 | 10 | 4 |
| 1 mg | 0.2 | 20 | 8 |
| 2 mg | 0.4 | 40 | 16 |
| 2.5 mg | 0.5 | 50 | 20 |
| 5 mg | 1 | 100 | 40 |
One unit on a U-100 syringe is 0.01 mL; on a U-40 it is 0.025 mL.
every SS-31 vial size on sale
reconstitution chart
| vial | 1 mL water | 2 mL water | 3 mL water | 5 mL water |
|---|---|---|---|---|
| 10 mg | 10 mg/mL 10 units = 1 mg | 5 mg/mL 10 units = 0.5 mg | 3.333 mg/mL 10 units = 0.333 mg | 2 mg/mL 10 units = 0.2 mg |
| 30 mg | 30 mg/mL 10 units = 3 mg | 15 mg/mL 10 units = 1.5 mg | 10 mg/mL 10 units = 1 mg | 6 mg/mL 10 units = 0.6 mg |
| 50 mg | 50 mg/mL 10 units = 5 mg | 25 mg/mL 10 units = 2.5 mg | 16.667 mg/mL 10 units = 1.667 mg | 10 mg/mL 10 units = 1 mg |
10 units on a U-100 syringe is 0.1 mL. Every cell is exact arithmetic: amount ÷ water.
what the numbers mean · where they come from
terms and sources
- Label amount or measured amount. The calculator starts from the amount printed on the vial. A lot certificate’s measured content (net peptide content, in mg) can replace it for the vial that was tested. HPLC purity is a share of peak area, not a mass, so a purity-only correction is shown as an estimate. See HPLC, certificate of analysis and how to read a peptide COA.
- Concentration. Amount in the vial ÷ water added. Terms: reconstitution, bacteriostatic water, lyophilized.
- Syringe units. A volume: 0.01 mL per unit on a U-100 syringe, 0.025 mL on U-40. Units say nothing about the compound until the concentration is known.
- Cost per draw. Vial price × amount per draw ÷ vial amount, from the price per mg of a current offer. Offers come from the SS-31 price comparison; certificates from the COA library.
Arithmetic only, on the numbers entered. Amounts from labels or trials are cited references, not recommendations; PeptideTech does not give personal use instructions and does not test products.
short answers
SS-31 calculator questions
How much bacteriostatic water do I add to SS-31 10mg?
What changes the calculated concentration?
What doses of SS-31 were used in research?
What does SS-31 cost per mg?
How much SS-31 is really in the vial?
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