What's the difference between SS-31 and elamipretide?

Same molecule. SS-31 is the research code; elamipretide is the generic INN name used in clinical trials.

SS-31 Calculator

SS-31 (also known as Elamipretide) reconstitution and dosage reference — calculate vial concentration, BAC water volume, and exact syringe units below.

Also known as: Elamipretide, MTP-131

Longevity

Key takeaways

At the reference preset of a 40mg SS-31 vial reconstituted with 2 mL of bacteriostatic water, a 20mg dose measures 100 units on a U-100 insulin syringe.

SS-31 (elamipretide) is a synthetic mitochondria-targeted tetrapeptide that binds cardiolipin to stabilize cristae and maintain electron-transport-chain function.

Concentration: 20 mg/mL
Draw volume: 1 mL
Units (U-100): 100
Doses per vial: ≈ 2
Reference preset: 40mg · 2mL · 20mg

Reference values from the default preset — adjust the calculator below for your vial.

U-100 scale · draw to 100 units

How to use this calculator›

1. Vial — the peptide amount printed on the vial, in milligrams.
2. BAC water — the bacteriostatic water added to the vial. More water means a lower concentration and a larger, easier-to-read draw.
3. Dose — the single dose being measured, in milligrams.
4. Syringe — the barrel being drawn into. The diagram rescales to that syringe, so the same dose sits at a different mark on a 0.3 mL barrel than on a U-100.

Educational reference only — not medical advice or a dosing recommendation.

Default: 40mg / 2mL / 20mgAdjust inputs to match your vial

About

What is SS-31?

SS-31 (elamipretide) is a synthetic mitochondria-targeted tetrapeptide that binds cardiolipin to stabilize cristae and maintain electron-transport-chain function. It has been investigated in clinical trials for primary mitochondrial myopathy and Barth syndrome.

Sourcing

Where researchers source this

Vendors below have been manually vetted for third-party COA practice and shipping reliability. Verify the current Certificate of Analysis on the vendor's product page before purchase.

Ascension Peptides

USA-based research vendor (Castle Rock, Colorado) publishing a per-batch Certificate of Analysis library with public lot IDs, so a vial can be matched to its own COA before and after purchase. Recent HPLC purity 99.79–99.98% across the catalog. Ships from the US and carries the full GLP-1 reference range alongside repair, longevity and cosmetic compounds.

Buy SS-31 10mg →

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Common vial sizes

5 mg	lyophilized powder
10 mg	lyophilized powder
40 mg	lyophilized powder

Reference dose ranges

10 mg	≈ 50 U-100 units (at 40mg / 2mL)
20 mg	≈ 100 U-100 units (at 40mg / 2mL)
40 mg	≈ 200 U-100 units (at 40mg / 2mL)

Reconstitution

How it's typically prepared

Reconstitute with BAC water; refrigerate.

FAQ

Frequently asked questions

What's the difference between SS-31 and elamipretide?: Same molecule. SS-31 is the research code; elamipretide is the generic INN name used in clinical trials.

Sources

References

PubMed search: elamipretide SS-31

Other Longevity peptides

Notice

PeptideDose is an educational reference. It is not medical advice and does not replace consultation with a licensed healthcare provider. Doses shown in presets are derived from published protocols and product labels — they are not personal recommendations.