How long does reconstituted SS-31 last?

What the 28 days is measuring

The 28 day figure in the table is a handling convention for multi-dose vials, not a measurement of SS-31 itself. It comes from how long the preservative in bacteriostatic water is relied on to keep a repeatedly punctured vial usable. It says nothing about whether the peptide inside is still intact, still folded correctly, or still doing anything.

That distinction matters because people often read a storage window as a potency guarantee. It is not one. A vial can be inside its window and degraded, or outside its window and chemically fine. The window is a rule for when to stop using a vial, chosen because it is conservative and easy to apply, not because it marks a measured cliff.

So treat 28 days as an administrative limit. It answers "when do I discard this" and nothing else.

Why room temperature costs so much

The two refrigerated and room temperature rows in the table are not a small adjustment. The warm window is a fraction of the cold one. That gap exists because the preservative system in bacteriostatic water is doing bacteriostatic work, holding growth in check rather than sterilizing, and that work degrades quickly as temperature rises. Warmth also accelerates the ordinary chemical processes that break peptides down.

The practical reading is that the fridge is not an optional refinement. It is the condition the 28 day number assumes. A vial that lives on a counter is operating under the 2 day row, whatever the label says.

Short excursions are the harder case, and this site cannot quantify them. There is no published arithmetic that converts an afternoon on a bench into days deducted from the window. What can be said is directional: warm time is expensive, and the honest response to a vial that has been out for an unknown stretch is to treat its remaining window as shorter than the table suggests, or to stop using it.

Counting the clock from mixing day

The window starts when water goes into the vial. Not at first injection, not when the vial is opened for the second time. Every hour the peptide spends in solution counts, including the hours it sits untouched in the door of a fridge before anyone draws from it.

This catches people who mix a vial ahead of time. If a 10 mg or 50 mg vial is reconstituted and then set aside for a week before use, that week has already come out of the 28 days. The remaining window is what is left, not a fresh 28.

Write the reconstitution date on the vial. Not the date of first use, not the date it arrived. The mixing date is the only one the window is anchored to, and it is the one nobody remembers a month later.

Powder is the stable form

The third row of the table is the one that changes behavior. Unmixed powder held cold lasts months to years. Solution lasts 28 days at best. That is a large enough difference that mixing volume becomes a planning decision rather than a convenience.

SS-31 is sold in 10 mg and 50 mg vials, and listings show water volumes of 1, 2, and 3 mL. The volume you choose changes concentration and therefore how many syringe units a given draw takes, but it does not change the window. A 50 mg vial in 3 mL and a 10 mg vial in 1 mL are on the same clock once water is in them.

What does change is how much peptide is exposed to that clock. A large vial mixed all at once puts everything into solution on day one. If the amounts in a listing, commonly quoted as 5 mg or 10 mg per dose, mean a mixed vial will not be finished inside the window, the leftover is discarded. Whether that is acceptable is a cost question and a sourcing question, and this site does not answer either.

Check the vendor's date on the powder before you rely on the months to years row. Dry storage is only stable from a known starting point.

What this page does not tell you

There is no reliable human pharmacokinetic data for SS-31 available to this site. That means no half life, no clearance time, no statement about whether repeated doses accumulate, and no dosing interval derived from any of those. Anything on this page concerns concentration, volume, and storage duration only.

SS-31 is not approved by any regulator for human use. This site has no medical review process. It does not tell you what dose to use, what to expect, what side effects occur, or whether the compound is safe or effective. Those are clinical questions and they need a clinician.

The storage table is arithmetic and convention. Use it to decide when a vial is finished, and take everything else elsewhere.

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

Does the 28 day window start at first injection?

No. It starts the day bacteriostatic water is added to the vial. Time in solution counts whether or not the vial has been drawn from. Label the vial with the reconstitution date so the count is not guesswork later.

Does a smaller mixing volume make a vial last longer?

No. The window is the same regardless of whether a vial is reconstituted in 1, 2, or 3 mL. Volume changes concentration and the number of units a draw occupies on the syringe. It does not change the handling clock.

What if my mixed vial sat out of the fridge for a few hours?

This site cannot convert warm time into days removed from the window, because there is no arithmetic here that supports that. The room temperature row is 2 days, which shows how quickly warmth erodes the window. A vial with an unknown warm history should be treated as having less remaining time than the table implies.

Can I freeze a reconstituted SS-31 vial to extend it?

The computed data on this page covers refrigerated and room temperature storage for mixed vials, and refrigerated storage for dry powder. It does not include freezing, so no window is given for it here.

How long does SS-31 stay in the body?

Unknown to this site. There is no reliable human pharmacokinetic data for SS-31 available here, so no half life, clearance time, or accumulation behavior is stated. The windows on this page describe the vial, not the body.

Is unopened SS-31 powder still good after a year?

Dry powder held refrigerated is the stable form, with a window described as months to years. That range depends on the manufacture date, which only the vendor can supply. Check the date on the vial rather than counting from when it arrived.