How to Reconstitute Research Peptides

A clear, step-by-step overview of bringing a lyophilized research peptide into solution — for laboratory use only.

What reconstitution means

Research peptides ship as a lyophilized (freeze-dried) powder for stability. Reconstitution is the process of dissolving that powder in a suitable diluent — most commonly bacteriostatic water (BAC water) — to create a measured solution for research.

What you need

• The lyophilized peptide vial
• Bacteriostatic water as the diluent
• A sterile syringe and alcohol swabs

Step by step

• 1. Sanitize. Swab the rubber stopper of both the peptide vial and the BAC water vial.
• 2. Draw diluent. Withdraw your chosen volume of bacteriostatic water into the syringe.
• 3. Add slowly. Insert the needle at an angle and let the water run down the inside wall of the vial rather than directly onto the powder.
• 4. Dissolve gently. Swirl — do not shake — until the solution is clear.
• 5. Store. Refrigerate the reconstituted vial and keep it away from light.

Calculating concentration

Concentration is simply the peptide mass divided by the diluent volume. For example, adding 2 mL of BAC water to a 5 mg vial yields 2.5 mg/mL. Each Glow Lab Protocols product page lists a suggested reconstitution volume.

After reconstitution

See our storage & handling guide for temperatures and stability. Lyophilized vials store at −20 °C; reconstituted solutions are typically kept refrigerated.

Research use only. Not for human consumption. Content is provided for laboratory and educational purposes and is not medical advice.