How to reconstitute BPC-157

What reconstitution changes and what it does not

A lyophilized vial contains a fixed mass of peptide, dried. Adding bacteriostatic water dissolves that mass into a liquid you can draw with a syringe. The mass in the vial does not change when you add water. Only the concentration changes, because the same peptide is now spread through more or less liquid.

This is the single most useful thing to understand before mixing. If you add more water, each unit of volume you draw carries less peptide. If you add less water, each unit carries more. The total available in the vial is identical either way.

That means there is no reconstitution volume that is arithmetically correct or incorrect. There are only volumes that make the number on your syringe easier or harder to read accurately. Choosing water volume is a measurement decision, not a dosing decision.

Reading the concentration table

Three things in the table are worth pulling out.

First, doubling the water halves the concentration. A 5 mg vial goes from 5 mg/mL in 1 mL to 2.5 mg/mL in 2 mL. This is a straight inverse relationship, and it holds at every vial size.

Second, different vial and water combinations land on the same concentration. A 5 mg vial in 1 mL and a 10 mg vial in 2 mL both give 5 mg/mL. The syringe reading for any given dose is identical between those two. The 10 mg vial simply holds more total doses before it runs out.

Third, 3 mL produces concentrations that are not round numbers: 1.67 mg/mL from a 5 mg vial, 3.33 mg/mL from a 10 mg vial. These are repeating decimals rounded for display. Arithmetic done with them will carry a small rounding error. If you want figures that divide cleanly, 1 mL and 2 mL are the volumes that give them.

The mixing sequence

Let the vial reach room temperature before you open it. A cold vial pulled straight from a refrigerator can draw moist air inside when the seal is pierced.

Wipe the rubber stopper on both the peptide vial and the bacteriostatic water vial with an alcohol swab and let them dry. Draw your chosen water volume into a syringe. Insert the needle through the stopper at an angle and let the water run down the inside wall of the glass rather than jetting directly onto the powder cake. Peptides are physically fragile in solution and a hard stream is unnecessary force.

Do not shake the vial. Set it down and wait, or roll it slowly between your fingers. The powder cake usually dissolves without help. When the liquid is clear and no solid remains at the bottom, the vial is reconstituted. Record on the vial or elsewhere how much water you added, because once the powder is dissolved there is no way to tell 1 mL from 3 mL by looking.

Getting from concentration to a syringe volume

Concentration is expressed in mg per mL. To find the volume that contains a given dose, divide the dose in mg by the concentration in mg/mL. The result is a volume in mL, which you read against the graduations printed on the barrel of your syringe.

The dose amounts that appear in product listings for BPC-157 are 0.25 mg, 0.5 mg and 1 mg. Run any of these through the division above against the concentration you actually mixed, and you have your volume. Note that the same listed dose corresponds to a different volume at every concentration in the table, which is why the water volume you chose has to be written down.

Insulin syringes are graduated in units rather than mL, and the two scales are printed against the same barrel. Check what your specific syringe is marked with before converting anything. A volume calculated for one syringe scale is not readable on another.

What this page will not tell you

There is no reliable human pharmacokinetic data for BPC-157. This site therefore makes no statement about its half life, how long it takes to clear, whether it accumulates with repeated administration, or how long any effect might last. The arithmetic above concerns concentration and volume only, and that is the full extent of what it covers.

BPC-157 is not approved by any regulator for human use. Nothing here is a recommendation to take it, at any amount or on any schedule.

This page has no medical review. It cannot tell you what dose is appropriate for you, what to expect, what adverse effects occur, or whether the compound is safe or effective. Those are clinical questions and they need a clinician, not a calculator.

What we do not know

We hold no reliable human pharmacokinetic data for BPC-157, 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 BPC-157 vial?

The volumes in common use are 1 mL, 2 mL and 3 mL, and each produces a different concentration from the same vial. None of them is more correct than the others in arithmetic terms, because the peptide mass in the vial is unchanged. This site does not recommend a volume.

Does adding more water make the dose weaker?

It makes the solution less concentrated, not the vial less potent. A 5 mg vial holds 5 mg whether you add 1 mL or 3 mL. More water means you draw a larger volume to get the same mass of peptide.

Why do a 5 mg vial and a 10 mg vial sometimes give the same concentration?

Because concentration is mass divided by volume. A 5 mg vial in 1 mL and a 10 mg vial in 2 mL both work out to 5 mg/mL. The syringe reading for a given dose is the same from either. The 10 mg vial just contains more total doses.

Can I use regular sterile water instead of bacteriostatic water?

They are different products. Bacteriostatic water contains a preservative intended to inhibit bacterial growth in a vial that will be entered more than once; plain sterile water does not. Which is appropriate for a given situation is a question for a pharmacist or clinician, not this page.

How long does BPC-157 stay in the body?

We do not know, and this site will not guess. There is no reliable human pharmacokinetic data for BPC-157, so no claim about half life, clearance or accumulation can be supported here. The calculations on this page cover concentration and volume only.

Is it a problem that 3 mL gives an uneven concentration?

The figures for 3 mL, 1.67 mg/mL and 3.33 mg/mL, are rounded repeating decimals. Any dose volume you calculate from them carries a small rounding error. Mixing in 1 mL or 2 mL avoids this because those combinations produce whole or half numbers.