For research use only. Not intended for human or veterinary use.
Introduction
BPC-157 (Body Protection Compound-157) is a synthetic pentadecapeptide derived from a protective protein found in gastric juice. It is widely studied in preclinical research for its effects on tissue repair, angiogenesis, and gastrointestinal function. As a lyophilized peptide, BPC-157 must be reconstituted before use in research applications.
This guide covers the correct procedure for reconstituting BPC-157 with bacteriostatic water, including solvent selection, reconstitution technique, concentration calculation, and storage.
Why Bacteriostatic Water for BPC-157?
BPC-157 is typically supplied as a lyophilized (freeze-dried) powder in sealed vials. To use it in research, it must be dissolved in a suitable aqueous solvent. Bacteriostatic water (sterile water containing 0.9% benzyl alcohol) is the standard choice for BPC-157 reconstitution for the following reasons:
- Multi-use compatibility: The 0.9% benzyl alcohol acts as a preservative, inhibiting microbial growth and allowing safe multiple withdrawals from the same vial over time
- Stability: BPC-157 is water-soluble and dissolves readily in bacteriostatic water without requiring co-solvents such as DMSO or acetic acid
- Sterility maintenance: Each withdrawal maintains sterility when proper aseptic technique is used
Plain sterile water is not recommended for multi-use vials as it provides no antimicrobial protection after the first withdrawal. For a detailed comparison, see: Reconstitution Solution vs Sterile Water.
What You Need
- BPC-157 lyophilized powder vial (e.g., 5mg)
- Bacteriostatic water for injection (Insulfine, 10ml or 30ml sterile vial)
- Sterile insulin syringe or low-dead-volume syringe
- Alcohol swabs
- Low-binding polypropylene storage tubes (if aliquoting)
Step-by-Step Reconstitution Protocol
Step 1: Prepare your workspace
Work on a clean, flat surface. Wash hands thoroughly and wear gloves. Wipe all vial tops with a fresh alcohol swab and allow to air dry for 30 seconds.
Step 2: Allow vials to reach room temperature
If the BPC-157 vial has been stored frozen or refrigerated, allow it to equilibrate to room temperature (15–30 minutes) before opening. This prevents moisture condensation and pressure differentials that can compromise sterility.
Step 3: Calculate your target concentration
Determine the concentration you need before adding solvent. Common research concentrations for BPC-157 range from 200 mcg/mL to 1 mg/mL. Use the formula:
Volume of BAC water (mL) = Peptide mass (mg) ÷ Target concentration (mg/mL)
Example: 5mg BPC-157 at 500 mcg/mL (0.5 mg/mL) → add 10mL of bacteriostatic water
Step 4: Draw up bacteriostatic water
Using a sterile syringe, draw the calculated volume of bacteriostatic water from the Insulfine vial. Insert the needle through the rubber stopper at an angle to minimise coring.
Step 5: Add solvent to the peptide vial
Insert the needle into the BPC-157 vial and direct the stream of bacteriostatic water down the side of the vial — not directly onto the lyophilized cake. This prevents foaming and mechanical disruption of the peptide.
Step 6: Mix gently
Do not shake or vortex. Gently swirl the vial or roll it between your palms until the powder is fully dissolved. The solution should be clear and colourless. If cloudiness persists, allow the vial to sit for 5 minutes and swirl again.
Step 7: Inspect before use
Hold the vial up to a light source and inspect for particulates or cloudiness. A properly reconstituted BPC-157 solution should be completely clear. Discard if particulates are visible.
Concentration Reference Table
| Peptide Amount | BAC Water Volume | Resulting Concentration |
|---|---|---|
| 5 mg | 2.5 mL | 2 mg/mL (2000 mcg/mL) |
| 5 mg | 5 mL | 1 mg/mL (1000 mcg/mL) |
| 5 mg | 10 mL | 0.5 mg/mL (500 mcg/mL) |
| 5 mg | 25 mL | 0.2 mg/mL (200 mcg/mL) |
| 10 mg | 10 mL | 1 mg/mL (1000 mcg/mL) |
| 10 mg | 20 mL | 0.5 mg/mL (500 mcg/mL) |
Storage After Reconstitution
Once reconstituted with Insulfine bacteriostatic water:
- Refrigerated (2–8°C): Stable for up to 28 days. Keep away from light. This is suitable for active research use.
- Frozen (-20°C): For longer storage, aliquot into single-use volumes before freezing. Thaw at 2–8°C before use. Limit freeze-thaw cycles to 3–5 maximum.
- -80°C: Preferred for long-term archival storage (6+ months).
For full storage guidance, see: How to Store Reconstituted Peptides.
Common Reconstitution Mistakes to Avoid
- Adding solvent directly onto the peptide cake (causes foaming)
- Vortexing or shaking vigorously (causes aggregation)
- Using plain sterile water for multi-use vials (no antimicrobial protection)
- Opening a cold vial without equilibrating to room temperature first
- Skipping visual inspection before use
For a complete list, see: Common Mistakes When Reconstituting Peptides.
About Insulfine Bacteriostatic Water
Insulfine reconstitution solution provides verified 0.9% benzyl alcohol in sterile 10ml and 30ml vials — formulated for reliable multi-transfer use in peptide research. Available in 2-pack through 12-pack configurations for individual and institutional procurement. Ships from our US warehouse.
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All Insulfine products are for research use only and not intended for human or veterinary use.