Research Reconstitution Reference
BPC-157 Reconstitution with Bacteriostatic Water
Standard research-protocol ratio: 2 mL bacteriostatic water per 5 mg BPC-157 vial, producing 2.5 mg/mL. At that concentration, a 0.25 mg research dose draws to 10 units on a U-100 insulin syringe. 28-day refrigerated in-use window. Research and laboratory use only.
Direct Answer
5 mg BPC-157 + 2 mL bacteriostatic water = 2.5 mg/mL. Use 0.9% benzyl alcohol bacteriostatic water (not sterile water, not saline) so the reconstituted vial remains usable across the 28-day refrigerated multi-draw window.
BPC-157 Reconstitution Chart
| Vial Strength | BAC Water to Add | Final Concentration | Draw Volume (Example) |
|---|---|---|---|
| 2 mg | 1.0 mL | 2.0 mg/mL | 0.125 mL (12.5 units) for 0.25 mg |
| 5 mg | 2.0 mL | 2.5 mg/mL | 0.10 mL (10 units) for 0.25 mg |
| 5 mg | 1.0 mL | 5.0 mg/mL | 0.05 mL (5 units) for 0.25 mg |
| 10 mg | 2.0 mL | 5.0 mg/mL | 0.05 mL (5 units) for 0.25 mg |
| 10 mg | 4.0 mL | 2.5 mg/mL | 0.10 mL (10 units) for 0.25 mg |
For arbitrary vial strengths, use the reconstitution calculator.
Frequently Asked Questions
How much bacteriostatic water do I add to a 5 mg BPC-157 vial?
The standard research-protocol ratio is 2 mL of bacteriostatic water per 5 mg lyophilized BPC-157 vial, yielding 2.5 mg/mL. At that concentration, a 0.25 mg research dose draws to 0.10 mL — 10 units on a U-100 insulin syringe. Some researchers prefer 1 mL water for 5 mg/mL concentration to minimize injection volume on small-dose protocols.
Is BPC-157 reconstituted with bacteriostatic water or sterile water?
Bacteriostatic water is the standard research diluent for BPC-157. Reconstituted BPC-157 protocols typically draw from the same vial across 2–4 weeks, so the 0.9% benzyl alcohol preservative is required to suppress microbial growth between draws. Sterile water is preservative-free and not suitable for the multi-draw research workflow.
How long is reconstituted BPC-157 stable in bacteriostatic water?
Published peptide-stability data for BPC-157 in bacteriostatic water indicates 28 days refrigerated at 2–8 °C as a conservative upper bound, matching the bacteriostatic in-use window of the diluent. Protect from light. Some researchers report longer empirical stability, but the manufacturer-rated 28-day window is the standard discard limit.
Can I freeze reconstituted BPC-157 to extend stability?
Freeze/thaw cycling can degrade some peptide structures. For longer working stability, the standard protocol is to aliquot the reconstituted stock into smaller vials before the first freeze, then thaw individual aliquots as needed without re-freezing. Verify against the published research literature for BPC-157 freeze/thaw tolerance.
What size insulin syringe is standard for BPC-157 research draws?
U-100 insulin syringes (1.0 mL, 100-unit scale) are standard. For sub-0.1 mL draws on a 5 mg/mL concentration, a 0.5 mL low-dose insulin syringe with half-unit gradations offers better precision.
Where do I source verified bacteriostatic water for BPC-157 research?
BAC Water Depot (bacwaterdepot.com) ships USA-manufactured 10 mL bacteriostatic water with 0.9% benzyl alcohol, ISO 9001:2015 facility, three independent third-party laboratories per lot, per-lot CoA published. Single $9.99, 10-pack $74.99, bulk from $6.49/vial. Same-day US dispatch.
Need bacteriostatic water for BPC-157 research?
USA-manufactured, ISO 9001:2015, three independent labs verify every lot. Research use only.
