BPC-157 5 mg reconstitution calculator
How much bac water for BPC-157 5 mg?
There’s no single right amount: the water sets the strength, not how much BPC-157 is in the vial, so use the volume on your pharmacy’s instructions. For example, 1 mL makes 5 mg/mL and 2 mL makes 2.5 mg/mL; the table below shows what each volume means on a U-100 syringe.
Your BPC-157 vial
Syringe
1 mL · 2-unit marks
Work backwards
Find the water for a given reading in units.
Enter your numbers to see the result.
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This is arithmetic, not medical advice. Confirm with your prescriber or pharmacist.
How our calculator worksAdvanced
Vial capacityOptional
The volume printed on the vial or its box, not the mg. We’ll tell you if the water won’t fit.
What each volume makes
| Water | Strength | Each unit | 1 mg is |
|---|---|---|---|
| 1 mL | 5 mg/mL | 50 mcg | 20 units |
| 2 mL | 2.5 mg/mL | 25 mcg | 40 units |
| 2.5 mL | 2 mg/mL | 20 mcg | 50 units |
Examples; use the volume on your pharmacy’s instructions. Units are on a U-100 syringe: 100 units = 1 mL.
About the 5 mg vial
Half the strength of the 10 mg vial at the same water
The same water makes this vial half as concentrated as the 10 mg vial. With 2 mL, the 5 mg vial is 2.5 mg/mL (25 mcg per unit) and the 10 mg vial is 5 mg/mL (50 mcg per unit), so the same syringe reading holds half as much here. Units worked out for one vial size don’t carry over to the other: recalculate whenever the vial size or the water changes. Equal strengths take half the water: 5 mg in 1 mL and 10 mg in 2 mL are both 5 mg/mL.
Free base or acetate: your label may not say
The FDA treats BPC-157 free base and BPC-157 acetate as different active ingredients. The nominations sent to the FDA didn’t make clear which one was meant, so it reviewed both (FDA briefing, 2026). A vial printed “BPC-157 5 mg” may not say which form it holds. Neither form appears in the European, Japanese or International Pharmacopeias, and no country has an approved BPC-157 product to compare against. The calculator can only work from the number printed on your vial, so ask a pharmacist what your label means before you mix.
A smaller vial spends less time mixed and punctured
At the same prescribed amount, a 5 mg vial holds half as many draws as the 10 mg vial, so it is used up sooner after mixing, with fewer needle punctures through the stopper. That’s arithmetic, not a shelf life: no official or validated in-use period exists for mixed BPC-157, because no approved product has a label that sets one. The FDA found quality data lacking for every dosage form, injection included, among them microbial quality such as bacterial endotoxins, and says a peptide’s stability is highly sensitive to how the product is made (FDA briefing, 2026). Ask a pharmacist how long your vial lasts once mixed, and see how long reconstituted peptides last. The adverse event reports the FDA found are on the BPC-157 page.
Sources for these notes
About BPC-157
US regulatory status
Not approved for human use in the US
BPC-157 is not approved by the FDA for any use, and no country has approved a BPC-157 medicine. As of April 2026 the FDA lists it among substances whose nominations were withdrawn from its Category 2 safety-risk list; it is not in Category 1. In July 2026 an FDA advisory committee narrowly voted, against FDA staff advice, to recommend adding it to the 503A bulks list. That vote is not binding, and as of October 16, 2026 the FDA had not published a proposed or final rule. WADA bans it at all times (S0).
As of
Sources (6)
- Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety RisksU.S. Food and Drug Administration, 2026 (opens in a new tab)
- Bulk Drug Substances Nominated for Use in Compounding Under Section 503A of the FD&C Act (updated May 14, 2026)U.S. Food and Drug Administration, 2026 (opens in a new tab)
- FDA Briefing Document for BPC-157-Related Bulk Drug Substances (PCAC, July 23-24, 2026)U.S. Food and Drug Administration, 2026 (opens in a new tab)
- July 23-24, 2026: Meeting of the Pharmacy Compounding Advisory CommitteeU.S. Food and Drug Administration, 2026 (opens in a new tab)
- FDA advisers narrowly vote to add 6 peptides to a drug compounding list. What’s next?ABC News, 2026 (opens in a new tab)
- World Anti-Doping Code International Standard: Prohibited List 2026World Anti-Doping Agency, 2026 (opens in a new tab)
How this BPC-157 calculator works
This calculator starts from the 5 mg in your vial. Add the water you mix it with and the dose your prescriber gave you; it divides the mg by the mL to get the strength, then turns your dose into mL and units on a 30, 50 or 100-unit syringe.
Peptinote never suggests a dose or a water volume. The example volumes are there to make the math easy to check, not as advice. For the full method, see the peptide calculator.
Questions people ask
How much bacteriostatic water for 5mg BPC-157?
There’s no single right amount: use the volume on your pharmacy’s instructions. The water only sets the strength; the vial still holds 5 mg however much you add. With 1 mL it’s 5 mg/mL (50 mcg per unit), with 2 mL 2.5 mg/mL (25 mcg per unit) and with 2.5 mL 2 mg/mL (20 mcg per unit). Enter your volume and prescribed dose above to get the units. This product isn’t FDA-approved, so no official label sets a water volume and its contents aren’t verified.
How much bac water for BPC-157 5mg?
Whatever volume you add, only the strength changes; the vial still holds 5 mg. More water spreads it out, so each unit holds less and the same dose takes more units: easier to measure, but more liquid to inject. Going from 1 mL to 2.5 mL takes each unit from 50 mcg to 20 mcg. Check the volume on your pharmacy’s instructions first. This product isn’t FDA-approved, so no official label sets a water volume and its contents aren’t verified.
How much bacteriostatic water in 5mg of BPC-157?
Use the volume your pharmacy specifies, and never more than the vial itself can hold (its size in mL, not the 5 mg on the label). If you weren’t given a volume, ask a pharmacist before mixing. For reference, the bac water calculator shows the arithmetic: water (mL) = vial mg × units ÷ (dose mg × 100). This product isn’t FDA-approved, so no official label sets a water volume and its contents aren’t verified.
How do I reconstitute BPC-157 5 mg?
Wipe both stoppers with alcohol and let them dry. Draw the volume of bacteriostatic water your pharmacy specifies into a new syringe, add it slowly down the inside of the vial, then swirl gently until clear; don’t shake. Label it with the strength: 5 mg in 1 mL is 5 mg/mL. Full steps: how to reconstitute peptides.
What are the steps to reconstitute BPC-157 5 mg?
Mixing your BPC-157 5 mg vial takes the bacteriostatic water your pharmacy specifies and a new sterile syringe. Add the water slowly against the glass and swirl, never shake, until the liquid is clear. If it stays cloudy or has particles, don’t use it; call your pharmacy. Then write the strength and date on the vial and store it as the label says (how to store peptides).
Can Peptinote tell me how many units to take?
No. Peptinote never suggests a dose. Enter the dose your prescriber gave you, and the calculator shows how to measure it: the units, the mL and where the line sits on your syringe, with every step of the math. If you aren’t sure what your dose is, ask your prescriber or pharmacist before drawing anything. How our calculator works.
Other BPC-157 vial sizes
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Every result is plain arithmetic from formulas we publish in full and check with automated tests. Peptinote doesn’t suggest doses and never sells or links to sellers of peptides.