How to Reconstitute Peptides

How to Reconstitute Peptides

Reconstitution is the process of dissolving lyophilized (freeze-dried) peptides in a liquid solution, typically bacteriostatic water. This step is essential before peptides can be used for research purposes.

What You'll Need

Before starting, gather all necessary materials:

Why Use Bacteriostatic Water?

Bacteriostatic water contains 0.9% benzyl alcohol, which prevents bacterial growth. This is crucial because:

Step-by-Step Reconstitution Process

Step 1: Prepare Your Workspace

Clean your work surface thoroughly with alcohol or disinfectant. Wash your hands with soap and water, or wear clean gloves. Ensure good lighting so you can see what you're doing.

Step 2: Allow Peptide to Reach Room Temperature

If your peptide was stored in the freezer, let it sit at room temperature for 5-10 minutes before reconstitution. This prevents condensation from forming inside the vial.

Step 3: Clean the Vial Tops

Using alcohol swabs, thoroughly clean the rubber stoppers on both the peptide vial and the bacteriostatic water vial. Let them air dry for about 10 seconds.

Step 4: Draw Bacteriostatic Water

Using a new insulin syringe:

Common reconstitution amounts:

Step 5: Add Water to Peptide Vial

This is the most critical step:

Step 6: Allow to Dissolve

After adding the water:

Step 7: Verify Complete Dissolution

The reconstituted solution should be:

If particles remain after 30 minutes of gentle swirling, the peptide may be damaged.

Step 8: Store Properly

Once reconstituted:

Calculating Concentration

After reconstitution, you need to know your concentration to dose accurately.

Formula: Peptide amount (mcg) ÷ Water added (ml) = Concentration (mcg/ml)

Example:

Use our [Peptide Calculator](/calculator) for precise calculations.

Common Mistakes to Avoid