All compound calculators / BPC-157
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BPC-157 reconstitution calculator
Enter how much BPC-157 is in your vial and how much bacteriostatic water you added. The calculator works out the concentration, and converts whatever amount you type into units on a U-100 insulin syringe. It converts what you enter — it does not suggest, recommend or validate any amount.
02About BPC-157
BPC-157
Studied largely in animal models of tissue injury. Reported to be relatively stable in gastric acid, which is why oral formulations are discussed. Not approved for human use.
How it is supplied: BPC-157 is sold only as a lyophilised powder. 5 and 10 mg are the vial sizes most commonly listed; 2 and 20 mg vials also appear. There is no ready-made solution and no prescription form, so every vial reaches you as powder and has to be reconstituted before anything can be drawn from it.
Labels differ in a way that changes the arithmetic. BPC-157 is usually supplied as an acetate salt, and suppliers are not consistent about whether the figure printed on the vial is the gross weight of that salt or the net peptide content — those are two different numbers for the same vial, and the net figure is the smaller one. An arginate-salt preparation is also sold and is labelled the same way. Whichever figure your label gives is the figure to type into the vial field above; this page cannot tell you which convention your supplier used.
03Reading the units for BPC-157
Reading the units for BPC-157
- The vial is labelled in milligrams and the amount drawn from it is conventionally written in micrograms. Those are a factor of 1000 apart, so the mcg/mg switch next to the amount field is the control that matters most on this page — more than the vial size and more than the water volume.
- At this page's 2 mL starting volume a 5 mg vial gives 2.5 mg/mL and a 10 mg vial gives 5 mg/mL. One unit on a U-100 syringe is 0.01 mL, so a unit off those vials carries 25 mcg and 50 mcg of powder respectively. Both are readable marks on a 0.3 mL syringe, which is why the smaller syringe is often the more legible choice at these concentrations.
- There is no International Unit for BPC-157, so the IU option in the amount field does not apply. An IU is defined per substance against an agreed reference standard, and no such standard exists for this compound.
04Handling and storage
Handling and storage
- Before it is mixed, a lyophilised peptide is a dry powder, and dry powder is the stable form. Once bacteriostatic water goes in, the clock starts — the solution is what degrades, not the powder.
- Add the water down the side of the vial and let it dissolve rather than shaking it. Peptides are large, fragile molecules; foaming is the visible sign that you were rough with one.
- Heat, light and freeze-thaw cycles are what shorten a reconstituted vial's life. Follow the storage and expiry guidance from your supplier or your clinician — this page cannot tell you how long your vial is good for.
- Lyophilised BPC-157 is hygroscopic. Letting a cold vial come up to room temperature before you pierce the stopper keeps condensation out of powder that has not been mixed yet.
05Questions
Questions
How much bacteriostatic water should I add to a BPC-157 vial?
That is your choice, and it changes only the concentration — never the total amount in the vial. More water spreads the same powder across more units on the syringe, which makes small amounts easier to read; less water means fewer units. Type your vial size and your water volume above and the calculator shows the concentration you would end up with.
How do I read the result in units?
A U-100 insulin syringe is marked in units, where 100 units is 1 mL. The calculator converts the amount you entered into millilitres first, then into those units, so the number it shows is the mark to draw to on that syringe. Check that the syringe in your hand is actually U-100 — U-40 syringes exist and the markings mean something different.
Does BPC-157 need to be reconstituted?
Only if you have it as a lyophilised powder. Powder has to be dissolved in bacteriostatic water before anything can be drawn from it. Anything already supplied as a solution does not get reconstituted, and this calculator is not the right tool for it.
Is this calculator free?
Yes. The reconstitution calculator on pepcoreapp.com stays free in any browser, with no signup, and it runs entirely on your device. The PepCore iPhone app is a separate subscription — $6.99/month or $39.99/year, with a 7-day free trial.
Is BPC-157 measured in mcg or mg?
Both, at different ends of the same arithmetic. The vial is labelled in milligrams — 5 mg and 10 mg are the usual sizes — while the amount drawn out of it is conventionally written in micrograms. That is what the mcg/mg switch next to the amount field on this page is for, and getting it wrong moves the answer by a factor of 1000. A result in the hundreds or thousands of syringe units is the usual sign the switch is on the wrong setting.
My vial says 5 mg but the supplier lists a different peptide content. Which number do I type in?
The one that describes what is actually in your vial, and the label is the only thing that can tell you which that is. BPC-157 is normally supplied as an acetate salt: some suppliers print the gross weight of the salt, others print the net peptide content, and the net figure is smaller than the gross for the same vial. If the label gives both, the net peptide content is what the concentration should be worked out from. If it gives one number with no explanation, that is a question for your supplier, not for a calculator.
Stop redoing this math every vial
PepCore for iPhone saves the reconstitution per vial, tracks what is open and what expires when, logs every dose, and rotates injection sites on a body map. No account, no sign-in — your data stays on your device. Subscription with a 7-day free trial.