Lumera Labs Journal · Canada
Peptide Reconstitution: Canadian Researcher's Reference Guide
Published 2024-04-15 · Lumera Labs Editorial · Kelowna, BC
Short answer: Add bacteriostatic water (0.9% benzyl alcohol) to the lyophilized peptide vial slowly down the side of the vial wall. Do not shake — gently swirl. Store reconstituted solution at 2–8°C and use within 28 days.
Materials
- Lyophilized peptide vial (Lumera Labs)
- Bacteriostatic water (BAC water) — 3 mL or 10 mL
- Sterile syringe with appropriate gauge needle (typically 25-27g, 1 mL or 3 mL syringe)
- Alcohol prep pads
- Sharps container for needle disposal
Bacteriostatic water vs sterile water
Bacteriostatic water (0.9% benzyl alcohol preservative) is preferred for research applications requiring storage of reconstituted solution beyond 24 hours. The benzyl alcohol prevents bacterial growth, extending usable lifespan to ~28 days at 2–8°C.
Sterile water contains no preservative. Use only for single-use applications where the entire reconstituted volume will be consumed within 24 hours, or for compounds incompatible with benzyl alcohol (rare; check compound spec).
Both are available at Lumera Labs accessories.
Volume calculations
The volume of water you add determines the concentration. Common targets:
| Peptide | Vial | BAC Water | Concentration |
|---|---|---|---|
| BPC-157 | 5 mg | 2 mL | 2.5 mg/mL |
| TB-500 | 10 mg | 2 mL | 5 mg/mL |
| Semaglutide | 5 mg | 2 mL | 2.5 mg/mL |
| Tirzepatide | 10 mg | 2 mL | 5 mg/mL |
| NAD+ | 100 mg | 5 mL | 20 mg/mL |
Reconstitution technique
- Inspect the lyophilized vial — the powder should be a uniform white plug at the bottom or visible as fine flakes against the vial wall.
- Wipe the rubber stopper of both vials with an alcohol prep pad and let air-dry.
- Draw the calculated volume of bacteriostatic water into your syringe.
- Insert the needle into the peptide vial at a 45° angle, against the inner glass wall — not directly onto the powder.
- Inject the water slowly, letting it run down the wall. Do not push aggressively.
- Remove the needle. Do not shake. Gently swirl the vial in your fingers for 10–15 seconds.
- Allow 5–10 minutes for full dissolution. The solution should be clear and free of particulates.
Storage after reconstitution
- Bacteriostatic water reconstitution: 2–8°C (refrigerator), use within 28 days
- Sterile water reconstitution: 2–8°C, use within 24 hours
- Long-term: some peptides can be aliquoted and frozen at -20°C for up to 60 days; this depends on the specific peptide's stability profile (consult your COA or contact us)
- Avoid: repeated freeze-thaw cycles — degrades peptide structure
Common issues
- Cloudy solution: incomplete dissolution. Wait 10 more minutes; gently swirl. If still cloudy, peptide may be partially degraded.
- Particulates floating: stop and contact lumeralabs@proton.me with photos. Possible contamination or degradation.
- Vacuum lost in vial: normal after reconstitution. Pressure equalizes when water is injected.
- Powder won't dissolve: some peptides require slight acidification (e.g., 1% acetic acid) before adding BAC water. Check compound-specific spec.
Browse research peptides · Bacteriostatic water →
Frequently Asked Questions
What is bacteriostatic water?
Sterile water with 0.9% benzyl alcohol added as a preservative. Used to reconstitute lyophilized research peptides for laboratory storage up to 28 days at 2-8 C.
Can I use tap water or distilled water?
No. Tap water contains microorganisms, and distilled water lacks bacteriostatic preservative. Always use pharmaceutical-grade bacteriostatic or sterile water.
How long does reconstituted peptide last?
With bacteriostatic water at 2-8 C, typically 28 days. With sterile water, 24 hours. Frozen at -20 C in single-use aliquots, up to 60 days for stable peptides.
Can I shake the vial to dissolve faster?
No. Shaking introduces foaming and shear stress that can denature peptide structure. Always swirl gently and allow time.
Where can I buy bacteriostatic water in Canada?
Lumera Labs supplies bacteriostatic water in 3 mL and 10 mL vials at lumerapeptide.com/products/bac-water/. Domestic Canadian shipping.
Disclaimer: All Lumera Labs products are supplied for laboratory research use only. Nothing in this article constitutes medical advice or a recommendation for human consumption. Refer to our research-use declaration for full terms.