How long does reconstituted CJC-1295 with DAC last?

What the 28 day window is measuring

The table above gives three conditions. The one most people want is the first: bacteriostatic water, refrigerated, 28 days.

That number is not a measurement of the peptide. It is the conventional handling window for a multi-dose vial preserved with bacteriostatic water, and it is about the preservative and the repeated needle entries, not about the molecule. Every time a needle goes through the stopper, the sealed environment inside is challenged. The preservative is what holds that line, and the window is the period over which that is conventionally treated as reliable.

So the figure answers one question: how long the vial is conventionally treated as a multi-dose container. It says nothing about potency. Two separate things get confused under the word "lasts," and this page covers only the first.

Why room temperature costs so much

The second row is worth staring at. Room temperature drops the window from 28 days to 2 days. That is not a modest penalty for a warm afternoon, it is a different order of magnitude.

Preservative effectiveness falls away far faster warm, and anything that did get in has an easier time. Cold does not stop that process, it slows it. The refrigerator is doing most of the work in the 28 day figure, which is why the figure collapses when you remove it.

The practical read: time out of the fridge is not free. A vial that lives on a counter is being handled under the second row regardless of what the vendor page says. This site will not tell you how to interpret a vial that spent some hours warm. That is a judgment call about a product with no medical oversight, and we are not equipped to make it.

The clock starts at mixing, not at first use

This detail most often goes wrong. The window is counted from the day water was added to the powder, not from the day you first drew a dose.

If you reconstitute and then leave the vial in the fridge before starting, that waiting time sits inside the window. The preservative has been working since water entered. Nothing resets at the first draw.

The fix is trivial. Write the mixing date on the vial in permanent marker the moment you finish adding water. Not the date you opened the box, not the date you first injected. A vial without that date is a vial you cannot place on the table above, and the information cannot be recovered later.

Powder is the stable form, and what water volume does not change

The third row explains why vials ship dry. Unmixed powder, refrigerated, is measured in months to years. The vendor date is your reference there, and it is worth checking before you mix rather than after. Since reconstitution starts the clock, there is no advantage to mixing a vial before you intend to use it.

Water volume does not move the window. The listed volumes of 1, 2 and 3 mL all sit under the same figures, because the window is set by the preservative and the temperature, not by dilution. What water volume changes is your syringe arithmetic, which is a separate calculation.

Vial size does interact with the window, but only through pace of use. The smaller vial size sold, drawn at the larger of the two dose amounts in listings, empties well inside 28 days. A larger vial drawn at the smaller dose amount may still hold liquid when the window closes. That is a purchasing decision, and it is better made before water goes in.

What is not on this page

CJC-1295 with DAC is not approved by any regulator for human use. There is no reliable human pharmacokinetic data for it that this site is willing to stand behind.

That means we make no claim about its half life, how long it takes to clear, how often it would be dosed, or whether it accumulates with repeated use. Those are exactly the questions the DAC modification usually gets discussed around, and exactly the ones we cannot answer.

Everything here concerns concentration, volume and storage. Whether to use this compound, at what amount, and with what expectations, is a clinical question. This site has no medical review process and does not answer clinical questions.

What we do not know

We hold no reliable human pharmacokinetic data for CJC-1295 with DAC, 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 reconstituted CJC-1295 with DAC go bad exactly at 28 days?

No. The 28 day figure is a conventional handling window for a preserved multi-dose vial, not a measured expiry point. What to do with a vial past that point is a judgment this site does not make for you.

Does the 28 days start when I first inject?

No. It starts the day bacteriostatic water was added to the powder. Refrigerated time before your first draw counts against the window. Write the mixing date on the vial as soon as you reconstitute, because it cannot be reconstructed later.

I left my vial out overnight. Is it ruined?

This page cannot answer that. The table shows 2 days at room temperature against 28 days refrigerated, which tells you warm storage is costly, but it does not let anyone grade a partial exposure. There is no medical review behind this site.

Does using more bacteriostatic water make the vial last longer?

No. The listed volumes of 1, 2 and 3 mL all fall under the same handling windows. The window is set by the preservative and the storage temperature, not by dilution. More water changes your syringe arithmetic and nothing else.

How long does CJC-1295 with DAC stay active in the body?

We do not say. There is no reliable human pharmacokinetic data for this compound that this site will stand behind, so we make no claim about half life, clearance or accumulation. The windows here describe the vial on your shelf, not the compound in a person.