Educational reference only — not medical advice. This calculator does maths only and does not recommend any dose. Always confirm your dose and preparation with a licensed healthcare provider or pharmacist.
Reconstitution Calculator
Results update live as you type. Your dose must come from your prescription or provider — this tool never suggests one.
Printed on the vial label — the total powder in the vial.
The volume of bacteriostatic water you mix into the vial.
Enter the dose exactly as given to you. 1 mg = 1,000 mcg.
U-100 syringes: 100 units = 1 mL, whatever the barrel size.
Nothing you type leaves this page — the calculation runs entirely in your browser. Educational reference only, not medical advice.
BPC-157 turns up in a lot of peptide discussions, and the questions people ask about it are almost always the same: how much powder is in the vial, how much water to add, and what that means on the syringe. This page answers the maths part of those questions and nothing else. It will not tell you whether BPC-157 works, and it will not suggest a dose.
What is BPC-157?
BPC-157 stands for Body Protection Compound 157. It is a synthetic peptide made of 15 amino acids, modelled on a fragment of a protein found in human gastric juice. It is sold as a freeze-dried powder in sealed vials for laboratory research. The research behind it is almost entirely preclinical — a 2025 systematic review found 36 studies, 35 of them in animals or cells and one small clinical report, with no clinical safety data found by the authors.
It is not approved by the FDA for any use, and there is no approved drug containing it. In July 2026 the FDA’s compounding advisory committee voted 8–6 to recommend adding it to the 503A bulks list, but that vote is non-binding and no final FDA rule has followed. It is on WADA’s 2026 Prohibited List as a class S0 non-approved substance. Vendors sell it as “research use only”.
The vial maths.
BPC-157 vials are most commonly sold as 5 mg and 10 mg. The powder only becomes measurable once you add bacteriostatic water, and the strength of every draw depends on how much water you added. The formula never changes: concentration = vial mg × 1,000 ÷ water mL.
Worked example — 5 mg vial, 2 mL of BAC water, example dose 250 mcg:
- Concentration: (5 × 1,000) ÷ 2 = 2,500 mcg/mL
- Each syringe unit (0.01 mL) holds 2,500 ÷ 100 = 25 mcg
- Units for the example dose: 250 ÷ 25 = 10 units (0.1 mL)
- Doses in the vial: 5,000 ÷ 250 = 20 doses
If you use a 10 mg vial with the same 2 mL of water, the concentration doubles to 5,000 mcg/mL, so the same example dose takes half as many units — 5 instead of 10. That is the whole point of calculating from your own label rather than memorising a number.
Storage (commonly cited):
Keep the unmixed vial frozen at −20 °C, dry and dark. Once mixed, refrigerate at 2–8 °C and do not freeze the solution. Sources commonly cite around 28 days for a reconstituted vial in BAC water, but figures vary (some say 14 days, some ~30 days), so treat 28 days as a planning figure, not a guarantee — your product’s own label takes precedence.
FAQs
How do I work out my BPC-157 dose in syringe units?
Find the concentration first: vial mg × 1,000 ÷ water mL. A 5 mg vial in 2 mL gives 2,500 mcg/mL, so each unit holds 25 mcg, and your units are your dose in mcg ÷ 25. Enter the dose your provider gave you in the calculator above.
How many doses are in a 5 mg BPC-157 vial?
Total peptide ÷ your dose, in the same unit: 5 mg is 5,000 mcg, so at an example dose of 250 mcg the vial holds 5,000 ÷ 250 = 20 doses. Change the dose and the count changes.
I added 3 mL of water instead of 2 mL. What changes?
The total peptide is the same, but the concentration falls: 5,000 ÷ 3 = 1,667 mcg/mL. Every dose now needs more units than before, so never reuse unit numbers from a different mix.
Is BPC-157 FDA-approved?
No. It is not an approved drug, and a 2026 advisory-committee vote to recommend it for the compounding bulks list was non-binding, with no final rule issued.
Related calculators
See also the TB-500 Calculator and the Peptide Calculator home page.
Educational reference only — not medical advice. This calculator does maths only and does not recommend any dose. Always confirm your dose and preparation with a licensed healthcare provider or pharmacist.