How to Reconstitute Peptides

Step-by-step guide for safe and proper peptide preparation

For research purposes only. This guide is educational. Always consult a healthcare professional before using any peptide. Proper sterile technique is critical to prevent infection.

Step 1

Gather Your Supplies

  • Lyophilized peptide vial (check mg on label)
  • Bacteriostatic water (BAC water) — NOT sterile water
  • Alcohol swabs (70% isopropyl)
  • Insulin syringes (29-31 gauge, 0.5mL or 1mL)
  • A separate mixing syringe (1-3mL) for reconstitution

Always use bacteriostatic water (contains 0.9% benzyl alcohol) for multi-use vials. Sterile water has no preservative and allows bacterial growth once opened.

Step 2

Clean Everything

  • Wash hands thoroughly with soap and water
  • Wipe the rubber stopper on the peptide vial with an alcohol swab
  • Wipe the rubber stopper on the bacteriostatic water vial
  • Let both dry for 10-15 seconds — don't blow on them

Contamination is the #1 risk with injectable peptides. Treat this like a sterile procedure every time.

Step 3

Draw Bacteriostatic Water

  • Decide your reconstitution volume (typically 1-2 mL)
  • Pull air into the mixing syringe equal to the BAC water volume
  • Insert needle into the BAC water vial and inject the air
  • Invert the vial and slowly draw out the desired amount of BAC water
  • Remove air bubbles by tapping the syringe gently

Use our Dosage Calculator to determine the ideal reconstitution volume for your target dose.

Step 4

Add Water to Peptide Vial

  • Insert the needle into the peptide vial through the rubber stopper
  • Aim the needle at the SIDE of the glass wall — NOT directly onto the powder
  • Inject the BAC water SLOWLY — let it trickle down the glass wall
  • Do NOT shake, swirl vigorously, or drop the vial
  • Let gravity do the work — the powder will dissolve on its own

NEVER shake a peptide vial. This denatures the peptide and can reduce potency by 30-80%.

Peptides are fragile proteins. Direct impact from a water stream or shaking can denature (destroy) the peptide chains. Patience here = full potency.

Step 5

Wait for Full Dissolution

  • Place the vial upright on a flat surface
  • Wait 5-10 minutes for the lyophilized powder to fully dissolve
  • The solution should become completely clear with no visible particles
  • If needed, gently roll the vial between your palms — do NOT shake

Some peptides dissolve faster than others. BPC-157 typically dissolves in 2-3 minutes. IGF-1 LR3 may take 10+ minutes. Don't rush it.

Step 6

Store Properly

  • Store reconstituted peptide in the refrigerator (2-8°C / 36-46°F)
  • NEVER freeze reconstituted peptides
  • Use within 28-30 days of reconstitution
  • Keep away from direct light — wrap in foil if your fridge has a light
  • Unreconstituted peptides can be stored frozen for months

Label each vial with: peptide name, reconstitution date, concentration, and expiry (28 days from recon date).

Quick Dose Calculator

2,500

mcg/mL

0.100

mL per dose

10

syringe units

Draw to the 10-unit mark on a U-100 insulin syringe

Full Dosage Calculator