How to reconstitute BPC-157, step by step

A BPC-157 vial arrives as a dry white film or small cake at the bottom of a glass tube. The label states one thing: the mass of powder inside. That number is not a volume, and it is not an amount to administer. Reconstitution turns the mass into a liquid you can measure, and it is arithmetic before it is technique. You choose the water, the water sets the concentration, and the concentration decides what one mark on the syringe holds. This is general information about mechanics and arithmetic, not medical advice.

What is in the vial

BPC-157 is a synthetic peptide of 15 amino acids, named for a fragment of a protein found in gastric juice. It is not an approved drug. The FDA lists it among bulk substances it has flagged for safety concerns in compounding, and it appears on the World Anti-Doping Agency's prohibited list under the category for non-approved substances. It is sold mostly as a research chemical, which means the label and any certificate of analysis are the only statements of what the powder is. What anyone claims about its effects is outside the scope of this page. What follows is how to dissolve a known mass into a known volume.

Vials are commonly sold as lyophilized powder in strengths such as 5 mg and 10 mg, though suppliers vary and you should read your own label rather than assume. The method is identical for every size. Only the numbers change.

How to reconstitute BPC-157, step by step

• Let the vial reach room temperature. About fifteen minutes out of the fridge. Cold glass and cold water only slow dissolution.
• Decide the water volume first. Piercing the stopper commits you, because water cannot be taken back out. Bacteriostatic water is sterile water with 0.9% benzyl alcohol as a preservative, which is what allows repeated entries. Plain sterile water has none.
• Swab both stoppers. A fresh alcohol wipe on each, then let them air dry.
• Draw the water. A syringe graduated in millilitres measures this step more accurately than an insulin barrel.
• Aim at the wall, not the powder. Insert the needle at an angle and let the water run slowly down the inside of the glass.
• Swirl, never shake. Roll the vial gently between your fingers and set it down. Most of these powders go into solution within a minute or two.
• Look before you draw. The liquid should be clear and free of visible particles. Cloudiness or residue after a long wait is a reason to stop.

Turning the vial into units

Once it is liquid, everything is division. The milligrams in the vial divided by the millilitres of water gives the concentration. The rest is unit conversion.

As an example, purely to run the maths: a 5 mg vial with 2 ml of bacteriostatic water sits at 2.5 mg/ml, which is 2,500 mcg/ml, so each mark on a U-100 barrel holds 25 mcg. A 10 mg vial with 4 ml lands at the same 25 mcg per mark, because the syringe sees the ratio and not the vial size. A 5 mg vial with 1 ml gives 50 mcg per mark.

The amount to use comes from a qualified clinician. This arithmetic only translates it into a position on the barrel. If you would rather not do the division at every vial, that conversion is what the Vialog calculator runs.

Storage, and the clock that starts at first entry

Lyophilized powder is the stable form, and kept cold, dry and out of light it outlasts anything in solution. Reconstituted peptide is a different object. Keep it refrigerated at 2 to 8 °C, in the body of the fridge rather than the door, and do not freeze it. The in-use window is then set largely by the water. Bacteriostatic water for injection is labelled for use within 28 days of first puncture, and that clock starts when the stopper is pierced. Writing the date on the vial takes two seconds and removes the question later.

Where it goes wrong

Five failures cover most of them. Reading the total in the vial as though it were a single serving. Slipping between milligrams and micrograms, a factor of a thousand in either direction. Adding the water before doing the arithmetic, then finding the amount falls between marks. Shaking rather than swirling. And reading a U-40 syringe as if it were U-100, which makes every figure 2.5 times off.

Frequently asked

How much bacteriostatic water goes into a 5 mg BPC-157 vial?

There is no fixed answer, because the volume is a choice about readability and not a property of the vial. Adding 2 ml gives 2.5 mg/ml and 25 mcg per mark on a U-100 barrel. Adding 1 ml gives 5 mg/ml and 50 mcg per mark. Pick the volume that puts the amount your clinician specified on a whole line you can read.

Can I use sterile water instead of bacteriostatic water?

It dissolves the powder the same way, but it contains no preservative, so the vial has no protection once it has been entered. Bacteriostatic water carries 0.9% benzyl alcohol for that purpose and is what makes a multi-entry vial workable. Sterile water is generally treated as single-use.

How long does reconstituted BPC-157 last in the fridge?

The limit is mostly set by the water. Bacteriostatic water for injection is labelled for 28 days from first puncture when refrigerated at 2 to 8 °C. Cloudiness, colour change or visible particles end the window early regardless of the date.

Why does the powder look like almost nothing?

Lyophilization leaves a very thin film or a small cake, and in a low-strength vial it can be nearly invisible against the glass. That is normal. The mass is printed on the label, not judged by eye.

Does the vial size change the method?

No. The steps are the same for any strength. Only the concentration changes, and it follows from the milligrams on the label divided by the millilitres of water you add.

Keep reading: How to reconstitute a peptide · How much bacteriostatic water to add.