How to Reconstitute Research Peptides
Reconstitution is the process of dissolving a lyophilized (freeze-dried) peptide powder into a liquid solution for use in research protocols. Done correctly, it produces a stable, sterile solution at a known concentration. Done incorrectly, it can degrade the compound, introduce contamination, or produce an inaccurate concentration that invalidates research results.
What You Need
Before reconstituting any peptide, gather the following:
Bacteriostatic Water (BAC Water): The standard solvent for research peptide reconstitution. Contains 0.9% benzyl alcohol as a preservative, which inhibits microbial growth and extends the stability of the reconstituted solution. Do not use sterile water for injection — it lacks the preservative and results in a much shorter stability window.
Insulin syringes (U-100): The standard syringe for peptide research. U-100 syringes hold 1mL and are marked in units (100 units = 1mL, so 1 unit = 0.01mL). Use our Dosing Calculator to convert your target dose to the correct unit mark.
Alcohol swabs: 70% isopropyl alcohol swabs for sterilizing vial tops before every needle insertion.
Step-by-Step Protocol
Follow this sequence for every reconstitution:
Step 1 — Calculate your BAC Water volume. Determine the concentration you want (mg/mL) and calculate the volume of BAC Water needed. Example: 10mg peptide at 2mg/mL requires 5mL BAC Water. Use our Reconstitution Guide for pre-calculated volumes for every J.Pharma product.
Step 2 — Swab both vial tops. Wipe the rubber stopper on the peptide vial and the BAC Water vial with a fresh alcohol swab. Allow 30 seconds to air dry completely before inserting any needle.
Step 3 — Draw BAC Water. Insert the syringe needle through the BAC Water vial stopper and draw the calculated volume into the syringe. Remove the needle.
Step 4 — Inject slowly down the vial wall. Insert the needle into the peptide vial and angle the tip so the BAC Water flows slowly down the inside glass wall — never directly onto the powder cake. This prevents foaming and mechanical degradation of the peptide chain.
Step 5 — Swirl gently. Roll the vial slowly between your palms. Do not shake, vortex, or invert rapidly. Most peptides dissolve within 30-90 seconds. Some (NAD+, larger peptides) may take several minutes.
Step 6 — Inspect and refrigerate. Solution should be clear. Some compounds have characteristic colors (GHK-Cu is blue — this is normal and expected). Refrigerate immediately at 2-8°C. Label with the date of reconstitution.
Concentration Reference Table
Use this table as a reference for standard research concentrations across J.Pharma's catalog:
| Compound | Vial Size | BAC Water | Concentration |
|---|---|---|---|
| GLP-3 | 10mg | 1mL | 10mg/mL |
| GLP-3 | 20mg | 2mL | 10mg/mL |
| GLP-2 | 10mg | 1mL | 10mg/mL |
| BPC-157 + TB500 | 20mg | 2mL | 10mg/mL |
| GHK-Cu | 100mg | 3mL | 33.3mg/mL |
| MOTS-C | 10mg | 1mL | 10mg/mL |
| NAD+ | 500mg | 5mL | 100mg/mL |
| Tesamorelin | 10mg | 2mL | 5mg/mL |
| Semax | 10mg | 2mL | 5mg/mL |
| HCG | 10000IU | 2mL | 5000IU/mL |
For full parameters including stability windows and special handling notes, see the complete Reconstitution Guide.
Storage and Stability
Lyophilized powder (before reconstitution): Most peptides are stable at room temperature for weeks and indefinitely when refrigerated. Exceptions: NAD+ should be refrigerated even in powder form. Light-sensitive compounds (NAD+, MT-2) should be stored away from direct light.
Reconstituted solution: Refrigerate at 2-8°C immediately after reconstitution. Do not freeze — freezing can denature peptide chains and alter concentration through ice crystal formation. Most peptides reconstituted in BAC Water are stable for 28-42 days refrigerated. Exceptions include NAD+ (14-21 days) and Glutathione (14-21 days).
Light-sensitive compounds: NAD+, MT-2 (Melanotan 2), and Glutathione should be wrapped in aluminum foil after reconstitution. Light degrades these compounds at a measurable rate.
Draw Volume Calculations
Once you have a reconstituted peptide at a known concentration, calculating your draw volume is straightforward:
Formula: Draw volume (mL) = Target dose (mg) / Concentration (mg/mL)
Example: You have GLP-3 reconstituted at 10mg/mL and your research protocol calls for 2mg. Draw volume = 2mg / 10mg/mL = 0.2mL = 20 units on a U-100 syringe.
For automated calculations with a visual syringe reference, use our free Dosing Calculator — select the compound, enter your BAC Water volume and target dose, and get the exact draw volume and syringe mark.