BPC-157 is not FDA-approved for human use. The reconstitution procedure below summarizes the standard injection-prep workflow that applies to lyophilized peptides generally — it is not a clinical protocol. If a prescribing provider has given you specific instructions that differ from this, follow theirs.
BPC-157 ships as a freeze-dried (lyophilized) powder in a small sealed vial. To inject it, you mix the powder with bacteriostatic water — a process called reconstitution. This post walks through the equipment, the math, and the most common errors that turn into dosing mistakes.
What you'll need
- The BPC-157 vial — typically 5 mg lyophilized powder
- Bacteriostatic water — a 10 ml or 30 ml multi-dose vial
- A reconstitution syringe — usually a 3 ml syringe with a 22 g or 25 g needle for drawing the BAC water
- Insulin syringes (U-100) — for drawing the actual dose. 30-unit or 50-unit barrel sizes are most common for BPC-157
- Alcohol swabs — at least four per session
- A flat clean surface and good light
A note on bacteriostatic water vs sterile water: bacteriostatic water contains 0.9% benzyl alcohol as a preservative, which lets you re-enter the vial multiple times without contamination. Sterile water has no preservative — once you've punctured the stopper, the contents should be used immediately or discarded. For multi-dose peptide work, use bacteriostatic water.
Step 1 — Decide your target concentration
Before you mix anything, decide how concentrated you want the final solution. This determines how much BAC water you'll add.
The math is simple:
concentration_mg_per_ml = vial_mg ÷ BAC_water_ml
For a 5 mg BPC-157 vial:
| BAC water | Concentration | 0.25 mg dose = |
|---|---|---|
| 1 ml | 5.0 mg/ml | 5 units (U-100) |
| 2 ml | 2.5 mg/ml | 10 units |
| 3 ml | 1.67 mg/ml | 15 units |
| 5 ml | 1.0 mg/ml | 25 units |
More water = lower concentration = more units to draw per dose.
The 2 ml configuration is the most-used default for a 5 mg vial. It puts a typical 0.25 mg dose at 10 units on the syringe — easy to read, easy to verify, low decimal-place risk.
To verify the math against your specific vial, use the calculator:
Inputs
BPC-157 common vial sizes: 5 mg, 10 mg. Typical dose range: 0.2–0.5 mg. Research publications. Not medical advice.
for a 0.2 mg dose
- Concentration
- 2.50 mg/ml
- Volume
- 0.080 ml
- Per ml
- 100 u
Not medical advice. Always verify against your vial label and your provider's instructions. Re-check before drawing.
Step 2 — Reconstitute
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Wipe both stoppers. Swab the BPC-157 vial's stopper, then the bacteriostatic water vial's stopper, with separate alcohol swabs. Let them air-dry for 10–15 seconds.
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Draw the BAC water. Use your 3 ml syringe. Pull back 2 ml of air, push it into the BAC water vial (this equalizes pressure), then invert the vial and draw 2 ml of water.
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Add the water to the BPC-157 vial slowly. Insert the needle into the BPC-157 vial's stopper, then angle the needle so the water runs down the inside wall of the vial rather than spraying directly onto the powder. Spraying onto the powder can damage the peptide.
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Do not shake. Swirl gently in your palm until the powder is fully dissolved. This usually takes under a minute. The solution should be clear with no visible particles. If it looks cloudy or has clumps after a couple of minutes of swirling, something is wrong — don't use it.
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Date the vial. Write the reconstitution date on the cap or on a label. BPC-157 in BAC water is generally stable for 2–4 weeks refrigerated.
Step 3 — Draw your dose
Once reconstituted:
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Wipe the stopper again with a fresh alcohol swab.
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Pull back air in your insulin syringe equal to the volume you'll draw (e.g., 10 units for a 0.25 mg dose at 2.5 mg/ml). Inject the air into the vial — this prevents a vacuum and makes drawing smoother.
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Invert the vial, draw the dose to the marked line on the syringe, and check for air bubbles. Tap the syringe with the needle pointing up to coalesce any bubbles, then push them back into the vial. Re-draw if needed.
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Pull the needle out and inspect the dose one more time before injecting.
Step 4 — Storage
- Refrigerate between 36–46°F (2–8°C). Do not freeze.
- Do not store at room temperature for extended periods. Reconstituted BPC-157 degrades faster outside the fridge.
- Discard if the solution becomes cloudy, discolored, or has visible particles.
- Track the open date. Most providers recommend discarding reconstituted vials at 28 days, regardless of remaining volume.
The five most common errors
These are the ones that turn arithmetic into dosing mistakes:
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mg vs mcg confusion. BPC-157 doses are typically 0.25 mg (which is 250 mcg). If a recipe says "250" without units, double- check. A 250 mg dose is a 1000× overdose.
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Decimal-place slip. 0.25 ml ≠ 0.025 ml. The latter is 10× too small. Always read the syringe twice, including out loud.
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Wrong vial size. BPC-157 sometimes ships as 10 mg or 2 mg instead of 5 mg. Check the label every time.
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Wrong syringe. A U-40 insulin syringe with the same number of "units" delivers 2.5× less volume than a U-100 syringe. Use U-100 unless your provider specifies otherwise.
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Spraying water on the powder. Run the BAC water down the inside wall of the vial, not directly onto the lyophilized cake.
If your reconstitution math doesn't match what your provider gave you, do not inject. Cross-check before drawing. Decimal-place errors in injectable dosing have produced harms; they are the single most common preventable mistake in this category.
Tracking BPC-157 in the iOS app
The iOS app handles:
- The reconstitution math against any vial size
- Daily injection reminders for the typical 4-week BPC-157 cycle
- Body-map injection-site rotation (BPC-157 is often injected near the injury area; the body map helps you avoid same-site reuse)
- Vial-expiry warnings so you discard at 28 days
- A doctor-ready PDF showing your full cycle history
Related reading
- BPC-157 reference page — common doses and vial sizes
- Reconstitution calculator — full free web tool
- Wolverine Stack: BPC-157 + TB-500 — if you're pairing it
- What is a peptide? — the biology background
References
- PubMed: BPC-157 — full literature
- PubMed: bacteriostatic water sterility — preservative chemistry
- ClinicalTrials.gov: BPC-157