How much bacteriostatic water should I add to a 10 mg BPC-157 vial?

It depends on the working concentration you want. Adding 1 mL yields 10 mg/mL, 2 mL yields 5 mg/mL, and 5 mL yields 2 mg/mL. Larger diluent volumes give lower concentrations and better small-volume measurement precision for dose-response research; smaller volumes save freezer space. This is a laboratory concentration decision, not a dosing recommendation.

How long is reconstituted BPC-157 stable?

When reconstituted with bacteriostatic water and stored at 2–8 °C, research stocks are generally used within about 3–4 weeks. BPC-157 is notably stable in aqueous solution compared to many peptides, but freeze-thaw cycles, heat, and light still accelerate degradation, so aliquoting before freezing is recommended for long-term storage.

Should I shake the vial to dissolve BPC-157 faster?

No. Shaking introduces shear stress and foaming that can compromise peptide integrity. Add the diluent slowly down the inner glass wall and swirl gently or let the vial stand. BPC-157 typically dissolves quickly into a clear solution without agitation.

BPC-157 Reconstitution: Lab Prep Guide

Q: What diluent is best for BPC-157 reconstitution?

For research stocks that will be sampled multiple times, bacteriostatic water (sterile water with 0.9% benzyl alcohol) is the standard laboratory diluent because the benzyl alcohol suppresses microbial growth. BPC-157 is stable enough that it does not require an acidic diluent or co-solvent — plain bacteriostatic water fully dissolves it into a clear, colorless solution.

Q: Is BPC-157 from NeuroLabs safe to use?

BPC-157 is sold strictly for laboratory research use only. It is not for human or veterinary use, is not a drug or supplement, has not been evaluated by the FDA, and is not intended to diagnose, treat, cure, or prevent any disease. All handling guidance provided is for preparing research materials in a laboratory setting.

BPC-157 reconstitution is the laboratory process of dissolving lyophilized (freeze-dried) BPC-157 peptide into a sterile liquid diluent to produce a defined, workable stock concentration for in-vitro and preclinical research. Because BPC-157 is a stable pentadecapeptide fragment derived from a sequence of human gastric juice protein, it tolerates reconstitution well relative to more fragile peptides — but consistent, reproducible results still depend on correct diluent selection, accurate concentration math, and disciplined storage. This guide covers the compound-specific handling steps a research technician needs to prepare BPC-157 stock solutions accurately.

Research Use Only (RUO): BPC-157 supplied by NeuroLabs is intended strictly for laboratory research use only. It is not for human or veterinary use, is not a drug or dietary supplement, has not been evaluated by the FDA, and is not intended to diagnose, treat, cure, or prevent any disease. The handling guidance below describes laboratory preparation of research materials only and is not medical or dosing advice.

What Makes BPC-157 Different at the Bench

BPC-157 (Body Protection Compound-157) is a synthetic 15-amino-acid peptide with the sequence Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val, molecular weight approximately 1419 Da. In research models it has been studied for its interaction with angiogenic signaling — including modulation of the VEGFR2–Akt–eNOS pathway — and its influence on nitric oxide systems and growth-factor expression in tissue-repair models. For reconstitution purposes, the practically relevant fact is that BPC-157 is notably stable: it remains intact in aqueous solution and resists degradation under conditions that would compromise many peptides. This makes it forgiving, but not immune to freeze-thaw damage or microbial contamination. For the underlying biology, see our BPC-157 Research Guide: Mechanisms & Studies.

Choosing a Diluent

The standard laboratory diluent for reconstituting research peptide stocks intended for repeated sampling is bacteriostatic water (sterile water containing 0.9% benzyl alcohol). The benzyl alcohol suppresses microbial growth, which matters when a vial will be accessed multiple times over days or weeks. For single-use preparations, sterile water for injection or sterile 0.9% saline may be used, but these lack a preservative. BPC-157's stability means it does not require an acidic diluent or special co-solvent for dissolution — plain bacteriostatic water is sufficient in the vast majority of research preparations.

Bacteriostatic water — preferred for multi-draw research stocks; benzyl alcohol limits contamination.
Sterile water for injection — acceptable for immediate single-use preparation, no preservative.
0.9% sterile saline — isotonic option for certain assay compatibility needs.

For a deeper comparison, see Bacteriostatic Water for Peptide Research and the general Peptide Reconstitution Guide.

Step-by-Step BPC-157 Reconstitution Protocol

The following procedure assumes a standard lyophilized 10 mg vial such as BPC-157 10mg. Work in a clean environment; a laminar flow hood is ideal but a sanitized bench with aseptic technique is the practical minimum for RUO work.

Equilibrate. Allow the sealed lyophilized vial to reach room temperature. Reconstituting a cold vial can cause condensation and inconsistent dissolution.
Sanitize. Wipe both the peptide vial stopper and the bacteriostatic water vial stopper with 70% isopropyl alcohol and let dry.
Draw diluent. Using a sterile syringe, withdraw your calculated volume of bacteriostatic water (see math below).
Add slowly. Insert the needle at an angle and let the diluent run down the inner glass wall of the peptide vial. Do not spray directly onto the powder cake — shear force can stress peptide integrity.
Dissolve gently. Do not shake. Swirl the vial slowly, or let it stand for a few minutes. BPC-157 typically goes fully into solution quickly, yielding a clear, colorless liquid.
Inspect. A properly reconstituted stock is clear with no visible particulates or cloudiness. Discard any preparation that appears turbid.
Label and refrigerate. Record the concentration, diluent, and date, then store at 2–8 °C.

Concentration Math for BPC-157

The core relationship is: concentration = mass of peptide ÷ volume of diluent. Choosing your diluent volume sets your working concentration. The table below shows common outcomes for a 10 mg (10,000 mcg) BPC-157 vial.

Diluent added	Resulting concentration	Peptide per 0.1 mL (10 units on a U-100 syringe)
1 mL	10 mg/mL (10,000 mcg/mL)	1000 mcg
2 mL	5 mg/mL (5,000 mcg/mL)	500 mcg
5 mL	2 mg/mL (2,000 mcg/mL)	200 mcg

A larger diluent volume yields a lower concentration, which improves the precision of small-volume measurements in dose-response research. A smaller volume produces a more concentrated stock that occupies less freezer space. For guided calculations, use our Calculating Peptide Research Concentrations walkthrough.

Worked example

To prepare a 5 mg/mL stock from a 10 mg vial, add 2 mL of bacteriostatic water. To then measure a 250 mcg research aliquot: 250 mcg ÷ 5000 mcg/mL = 0.05 mL, which reads as 5 units on a U-100 (0.5 mL) insulin-style measuring syringe.

Storage and Stability

Handled correctly, reconstituted BPC-157 is among the more stable research peptides in solution, but the following practices preserve integrity and reproducibility across an experiment:

Lyophilized (unopened): store at -20 °C for long-term holding; short-term room-temperature exposure during shipping is tolerated well by this peptide.
Reconstituted stock: refrigerate at 2–8 °C and use within roughly 3–4 weeks for bacteriostatic-water preparations.
Freeze-thaw: minimize cycles. If long-term frozen storage of reconstituted material is required, aliquot into single-use portions first so you thaw only what a given assay needs.
Light and heat: keep vials shielded from direct light and away from heat sources; both accelerate peptide-bond degradation.

For the chemistry behind these limits, see Peptide Storage & Stability in the Lab.

Common Reconstitution Errors to Avoid

Shaking vigorously — introduces shear stress and foaming; swirl instead.
Spraying diluent onto the cake — direct high-velocity streams can stress the peptide; run it down the glass wall.
Skipping labeling — an unlabeled stock of unknown concentration or age is not usable for reproducible research.
Reusing needles — compromises sterility of a multi-draw vial.

Every NeuroLabs BPC-157 preparation is ≥99% purity and third-party COA-tested, giving your reconstitution a defined starting mass for accurate concentration work. For the broader framework, return to the Peptide Handling & Lab Practices Guide.