How to reconstitute SS-31

What the water volume actually changes

SS-31 is sold as a lyophilized powder. The vial holds a fixed mass of peptide, stated on the label as 10 mg or 50 mg. Adding bacteriostatic water does not change that mass. It only spreads the same mass through a larger or smaller volume of liquid.

That is the whole of the arithmetic. Concentration is the mass in the vial divided by the volume of water you add. A 10 mg vial reconstituted with 1 mL sits at 10 mg/mL. Put 2 mL into the same vial and it sits at 5 mg/mL. You have not made more peptide or less, only changed how many milligrams ride in each milliliter.

Because of that, the water volume is a choice about measurement convenience, not about strength. The reason to pick one volume over another is how easily the dose you intend lands on a readable mark on the syringe barrel.

Bacteriostatic water is the diluent named in listings for this class of product because it contains a preservative, unlike sterile water for injection. We are not in a position to make claims about sterility outcomes, storage life, or handling technique, and this site has no medical review behind it.

Reading the concentration table

The table on this page runs both vial sizes against the three water volumes commonly used. Three things in it are worth pulling out.

First, the 50 mg vial is five times the mass of the 10 mg vial, so at any given water volume it lands five times higher in concentration. A 50 mg vial in 1 mL is 50 mg/mL. That is a dense preparation, and any dose drawn from it occupies a very small slice of the syringe barrel.

Second, two different setups can produce the same working concentration only if the mass-to-volume ratio matches. Nothing in this table pairs off that way, so the vial you bought largely determines the range you are working in.

Third, the 3 mL rows do not divide cleanly. A 10 mg vial in 3 mL is 3.33 mg/mL and a 50 mg vial in 3 mL is 16.67 mg/mL, both rounded. Repeating decimals mean the volume for a round milligram dose will not sit on a tidy syringe mark. If clean numbers matter to you, 1 mL and 2 mL are the volumes that give them.

Turning milligrams into syringe volume

Take the dose in milligrams and divide it by the concentration in milligrams per milliliter. The result is the volume in milliliters. A U-100 insulin syringe is graduated across its full 1 mL barrel, so once you have a volume in milliliters you can read it straight off the scale.

Work an example with the dose sizes that appear in listings. A 5 mg dose drawn from a 10 mg vial reconstituted in 2 mL, which is 5 mg/mL, is one full milliliter, the entire barrel. The same 5 mg drawn from a 10 mg vial in 1 mL, which is 10 mg/mL, is half a barrel.

Now the other direction. A 10 mg dose from a 50 mg vial in 1 mL, at 50 mg/mL, sits in a small fraction of the barrel near the bottom of the scale. Small volumes carry more measurement error, because the same physical wobble in where you stop the plunger is a larger share of the dose. That is the practical argument for using more water with a large vial: it moves the reading up into a part of the scale you can actually see.

None of this tells you which dose is correct. The 5 mg and 10 mg figures above are amounts that appear in vendor listings, quoted here as arithmetic inputs only.

What is not known about SS-31

There is no reliable human pharmacokinetic data for SS-31 that we are willing to build on. This site therefore makes no claim about its half life, how long it takes to clear, whether it accumulates with repeated administration, or how long any effect would last. If you have seen a duration quoted somewhere, we cannot confirm it.

That absence has a consequence for dosing arithmetic. Concentration math tells you what is in a given volume of liquid. It says nothing about what happens after that liquid leaves the syringe. Frequency, spacing between doses, and total exposure over time are all questions this page cannot answer.

SS-31 is not approved by any regulator for human use. There is no approved label, no approved dose, and no approved route. Questions about safety, side effects, interactions, or whether the compound does anything at all belong with a clinician who can look at your situation. This page is a calculator with sentences around it.

What we do not know

We hold no reliable human pharmacokinetic data for SS-31, so this site makes no claims about its half life, how long it takes to clear, or how it accumulates. The arithmetic below concerns concentration and volume only.

This page answers arithmetic and handling questions. It does not tell you what dose to take, what to expect, or whether anything is appropriate for you, and there is no medical review behind it.

Common questions

How much bacteriostatic water should I add to a 10 mg SS-31 vial?

Any of the three volumes on this page works arithmetically. 1 mL gives 10 mg/mL, 2 mL gives 5 mg/mL, and 3 mL gives 3.33 mg/mL. The choice is about where your intended dose falls on the syringe scale, not about strength, since the vial holds the same mass either way.

Does adding more water make SS-31 weaker?

It makes each milliliter weaker, not the vial. A 10 mg vial contains 10 mg whether you add 1 mL or 3 mL. More water means you draw a larger volume to get the same milligram amount. The total mass available is fixed by the label.

What does a dose read on a U-100 syringe?

Divide the dose in milligrams by the concentration in milligrams per milliliter to get a volume in milliliters, then read that volume against the barrel, which spans 1 mL in full. For example, 5 mg from a preparation at 5 mg/mL is one full milliliter. This site does not recommend any dose.

Why is 3 mL of water awkward for a 10 mg vial?

It gives 3.33 mg/mL, a rounded repeating decimal. Round milligram doses divided by that number produce volumes that do not sit on clean syringe markings. The 50 mg vial has the same issue at 3 mL, where the concentration is 16.67 mg/mL.

How long does SS-31 stay in the body?

We do not know, and we will not guess. There is no reliable human pharmacokinetic data for SS-31 that this site is prepared to cite, so no claim is made about half life, clearance, or accumulation. The arithmetic here covers concentration and volume only.

Is SS-31 approved for human use?

No. It is not approved by any regulator for human use, which means there is no approved dose, route, or label to work from. This page has no medical review behind it and cannot tell you whether use is safe or effective.